How they compare on reviews, projects, home types, history and transparency, plus who each may suit, renovation cost benchmarks and what to check before you sign.
Written and reviewed by the Zenith Arc Design Team
Updated 3 November 2026.
We screened 49 Singapore interior design firms against CaseTrust, BCA and HDB records on 3 October 2026. That first round of checks is done for you. Of these, 22 passed every check. The ten below scored highest of those 22 on reviews, published projects, home types covered, operating history and transparency. We checked the listed firms' evidence on the dates shown in Sources. Under this guide's method, the top three are Zenith Arc, Ovon Design and Urban Home Design, within about three points of each other.
Find your fit fast
Zenith Arc publishes this guide and ranks first under its scoring formula. Every listed firm, including us, was assessed using the same eligibility checks and scoring criteria. The guide helps homeowners check registrations, reviews and published information before choosing a firm.
| # | Firm | Score | Best for (examples in profile) | Qanvast rating (reviews) | Qanvast projects | Property types (own site) | Registered since (UEN) |
|---|---|---|---|---|---|---|---|
| 1 | Zenith Arc Top ranked | 91.4 | Layout changes in resale homes | 4.79 (163) | 161 | HDB · Condo · Landed · Commercial | 2016 |
| 2 | Ovon Design | 90.0 | Japandi or wabi-sabi HDB flats | 4.83 (168) | 146 | HDB · Condo · Landed · Commercial | 2017 |
| 3 | Urban Home Design | 89.2 | Homes themed on a specific reference | 4.99 (402) | 187 | HDB · Condo · Landed · Commercial | 2020 |
| 4 | Starry Homestead | 88.0 | Japandi across property types | 4.80 (480) | 402 | HDB · Condo · Landed · Commercial | 2014 |
| 5 | Eight Design | 86.4 | Custom carpentry and smart-home features (firm's description) | 4.74 (218) | 30 | HDB · Condo · Landed · Commercial | 2013 |
| 6 | Fifth Avenue Interior | 86.1 | BTO flats in a chosen style | 4.72 (398) | 304 | HDB · Condo · Landed · Commercial | 2015 |
| 7 | Space Atelier | 85.5 | Resale HDB flats and condos | 4.69 (410) | 302 | HDB · Condo · Landed · Commercial | 2014 |
| 8 | Juz Interior | 81.5 | Inspecting published budgets and timelines | 4.82 (227) | 113 | HDB · Condo · Landed | 2013 |
| 9 | Darwin Interior | 81.3 | Furniture and soft furnishings chosen with the layout | 4.81 (300) | 101 | HDB · Condo · Landed | 2011 |
| 10 | Flo Design | 80.2 | Comparing published HDB budgets | 4.85 (306) | 267 | HDB · Condo · Landed · Commercial | 2017 |
Best for: Layout changes in resale homes
Best for: Japandi or wabi-sabi HDB flats
Best for: Homes themed on a specific reference
Best for: Japandi across property types
Best for: Custom carpentry and smart-home features (firm's description)
Best for: BTO flats in a chosen style
Best for: Resale HDB flats and condos
Best for: Inspecting published budgets and timelines
Best for: Furniture and soft furnishings chosen with the layout
Best for: Comparing published HDB budgets
These are the ten highest-scoring firms among the 22 that met this guide's eligibility checks. All ten held CaseTrust accreditation, BCA CR06 registration and an HDB Directory listing when we last checked (sources and check dates). Use the scores to decide whom to meet first. They don't measure design taste, and a gap of two or three points is small. "Best for" notes are our editorial suggestions from each firm's published portfolio. They don't affect scores and aren't awards or exclusive specialties.
Where the columns come from: registration status is from official records (CaseTrust, BCA and HDB). The Qanvast columns are platform data, as Qanvast displayed them on 11 October 2026; we didn't verify them review by review. Property types are from each firm's own website, and "Registered since" is the company's UEN registration year.
Your home, your style and your budget matter more than the ranking. Start with the closest match below, then read those firms’ profiles. Examples reflect published portfolios and are not exhaustive; omission from a category doesn’t mean a firm can’t do that work.
Narrow the ten firms by property type, style or published project costs. Matching firms keep their ranking order.
Matches reflect what this guide documents: property types on each firm's own website, style labels on its published projects and project costs on its own site. They don't cover every service a firm offers, so a firm that doesn't match may still do that work.
No firm matches all of these filters on the evidence this guide documents. That doesn't mean no firm can do the work: remove a filter, or ask firms directly.
Your home type changes the rules, the biggest cost risks and what to ask a firm. Use this table to prepare before you meet anyone. Each firm’s profile shows the home types it has published projects for.
| Home type | Rules to know | What moves the cost | Ask each firm | Budget guide |
|---|---|---|---|---|
| BTO / new HDB flat | HDB renovation guidelines apply, and the contractor must be on HDB’s Directory of Renovation Contractors. In a newly built flat, the bathroom and toilet wall and floor finishes can’t be removed for the first 3 years after the block is completed. | How much carpentry you build, and the material grades | An itemised quotation: carpentry lengths and materials, electrical points, and whether the design fee is separate | 4-room: about S$50,000–S$60,000 (Qanvast 2026 projection) → costs |
| Resale HDB flat | The same HDB guidelines and directory apply; some works need an HDB permit. | Hacking, rewiring, plumbing and fixing a previous owner’s alterations | How they inspect the existing condition, and whether repairs are priced separately from new work (what hacking can uncover) | 4-room: about S$70,000–S$81,600 → costs |
| Condo | MCST house rules can limit working hours and require protection and deposits. Structural elements can’t be altered without a Professional Engineer’s assessment and the required approval (BCA guidance). | Protection, restricted hours, hacking limits, and condition if resale | Who handles the MCST paperwork and deposits, and how the schedule fits the allowed hours | New: S$40,000–S$52,000; resale: S$80,000–S$105,000 → costs |
| Landed home | For A&A or structural work, ask your Qualified Person (QP) to confirm the required URA planning permission or lodgement and BCA approvals before work starts. | Interior refresh vs A&A vs rebuild | What the firm handles vs what you or your QP submit, and how trades and site access are coordinated | Interior: from about S$120,000 (terrace); A&A from about S$450,000 → landed costs |
| Shop or office | Landlord approval, fixed handover dates and reinstatement at the end of the lease. Fire safety works, such as layout changes that affect escape routes or changes to sprinklers and fire alarms, may need SCDF approval: ask your Qualified Person (QP) to confirm whether full SCDF plan approval, MAA lodgement or an exemption applies before work starts. | Downtime, M&E works and reinstatement | Their commercial track record, and who obtains approvals | Not covered: this guide is residential-led |
BTO / new HDB flat
Rules to know: HDB renovation guidelines apply, and the contractor must be on HDB’s Directory of Renovation Contractors. In a newly built flat, the bathroom and toilet wall and floor finishes can’t be removed for the first 3 years after the block is completed.
What moves the cost: How much carpentry you build, and the material grades
Ask each firm: An itemised quotation: carpentry lengths and materials, electrical points, and whether the design fee is separate
Budget guide: 4-room: about S$50,000–S$60,000 (Qanvast 2026 projection) → costs
Resale HDB flat
Rules to know: The same HDB guidelines and directory apply; some works need an HDB permit.
What moves the cost: Hacking, rewiring, plumbing and fixing a previous owner’s alterations
Ask each firm: How they inspect the existing condition, and whether repairs are priced separately from new work (what hacking can uncover)
Budget guide: 4-room: about S$70,000–S$81,600 → costs
Condo
Rules to know: MCST house rules can limit working hours and require protection and deposits. Structural elements can’t be altered without a Professional Engineer’s assessment and the required approval (BCA guidance).
What moves the cost: Protection, restricted hours, hacking limits, and condition if resale
Ask each firm: Who handles the MCST paperwork and deposits, and how the schedule fits the allowed hours
Budget guide: New: S$40,000–S$52,000; resale: S$80,000–S$105,000 → costs
Landed home
Rules to know: For A&A or structural work, ask your Qualified Person (QP) to confirm the required URA planning permission or lodgement and BCA approvals before work starts.
What moves the cost: Interior refresh vs A&A vs rebuild
Ask each firm: What the firm handles vs what you or your QP submit, and how trades and site access are coordinated
Budget guide: Interior: from about S$120,000 (terrace); A&A from about S$450,000 → landed costs
Shop or office
Rules to know: Landlord approval, fixed handover dates and reinstatement at the end of the lease. Fire safety works, such as layout changes that affect escape routes or changes to sprinklers and fire alarms, may need SCDF approval: ask your Qualified Person (QP) to confirm whether full SCDF plan approval, MAA lodgement or an exemption applies before work starts.
What moves the cost: Downtime, M&E works and reinstatement
Ask each firm: Their commercial track record, and who obtains approvals
Budget guide: Not covered: this guide is residential-led
See our own examples: HDB projects · condo projects · landed projects · commercial projects. For HDB-specific consultation questions, see our HDB interior designer guide.
Grouped headings collect related labels. ✓ means the firm has at least one published project labelled with that style; each firm's own wording and the named project are in its profile evidence. Style ticks are not scored and don't affect the ranking.
| Style | Zenith Arc | Ovon Design | Urban Home Design | Starry Homestead | Fifth Avenue Interior | Space Atelier | Juz Interior | Flo Design |
|---|---|---|---|---|---|---|---|---|
| Minimalist / Muji | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Not listed for this style |
| Japandi | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Not listed for this style |
| Wabi-sabi | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Not listed for this style |
| Scandinavian | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Modern luxury | Yes | Yes | Not listed for this style | Yes | Yes | Yes | Yes | Yes |
| Contemporary | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Farmhouse | Yes | Yes | Not listed for this style | Yes | Yes | Not listed for this style | Yes | Not listed for this style |
| Mid-century modern | Yes | Yes | Yes | Yes | Yes | Not listed for this style | Yes | Not listed for this style |
| Industrial | Yes | Yes | Yes | Not listed for this style | Yes | Yes | Yes | Not listed for this style |
| Colonial | Yes | Yes | Not listed for this style | Yes | Yes | Yes | Not listed for this style | Not listed for this style |
Minimalist / Muji
Japandi
Wabi-sabi
Scandinavian
Modern luxury
Contemporary
Mid-century modern
For what each style looks like, see our interior design styles guide.
Zenith Arc Pro Tip: Pair your mood board with a floor plan, ideally with measurements. A mood board shows the look you like. Without accurate measurements, though, even a beautiful design may not work in practice: a wardrobe that blocks a window, or a dining table that leaves no room to walk past. If you don't have a measured plan, ask whether the firm measures your home before it starts designing.
What should I budget? Budget for the agreed renovation scope, such as carpentry, hacking, tiling, electrical work and finishes, and ask whether design fees are included. Size, condition, scope and material choice all move the total. Qanvast's benchmarks give a starting range:
HDB flats: Qanvast's 2026 projections
| Flat | New BTO | Resale HDB |
|---|---|---|
| 3-room | S$40,800–S$52,500 | S$55,000–S$68,300 |
| 4-room | S$50,000–S$60,000 | S$70,000–S$81,600 |
| 5-room | S$60,600–S$76,500 | S$80,800–S$98,900 |
Source: Qanvast, "What are the Expected Renovation Costs for HDB Flats in 2026?" (published 12 February 2026; checked 28 October 2026). These are projections from 2025 project medians with a 1–2% inflation assumption, not observed 2026 averages.
Condos: Qanvast's 2025 benchmarks
| Condo | Average renovation cost |
|---|---|
| New condo | S$40,000–S$52,000 |
| Resale condo | S$80,000–S$105,000 |
Source: Qanvast Renovation Cost Calculator, which labels these "average renovation costs in 2025" (checked 28 October 2026).
Landed homes: a wide range, because the scope varies so much
Landed projects vary far more than flats or condos. One owner may want an interior refresh; another needs A&A (addition and alteration) works or a full rebuild. The cost depends on how much work is done and what it covers, so any range is wide. Only a site visit and an agreed scope can narrow it. As a broad starting point:
| House type | Interior renovation | A&A or reconstruction |
|---|---|---|
| Terrace | S$120,000–S$200,000 | S$450,000–S$1.3 million |
| Semi-detached | S$180,000–S$350,000 | S$900,000–S$3 million |
| Bungalow (non-GCB) | S$350,000–S$650,000 | S$1.5 million–S$5 million |
Source: Zenith Arc's renovation cost calculator, our own indicative ranges (checked 27 October 2026). The interior figures are at standard specification. The A&A bands are indicative construction costs only; QP and submission fees are excluded. Design fees are excluded where charged separately from the build.
These are broad benchmarks, not a quotation for your home. Our interior design cost guide covers premium full-service scope, including landed homes. Its figures and the benchmarks above use different sources and scopes, so they are not directly comparable. For a range matched to your property type, condition, size and scope, use our renovation cost calculator. It isn't a quotation: final pricing needs a site survey, confirmed scope and material selections.
Is the design fee separate? It depends on the firm. Some include design in the renovation quotation; others charge for it separately. Ask what the design stage covers (layout plans, 3D drawings, revisions), whether it's itemised, and whether any design fee is credited if you go ahead. A limited advertised package is not the same as a whole-renovation budget, so compare full quotations, not headline prices.
Registrations take a few minutes to check, and each register tells you something different. Search by company name or UEN:
Then check that the company name and UEN on your quotation match what the registers show. For warning signs to watch for, see how to avoid interior design scams.
Our renovation safety guide covers payment schedules, contracts and red flags in detail. For an HDB flat, our HDB interior designer guide has a longer list of consultation questions and a shortlist scorecard.
Resale flats: what hacking can uncover. Hacking can reveal concealed pipes or a previous owner’s alterations that aren’t on the floor plan. A careful firm documents what it finds, explains the implications and checks what approval or qualified professional is needed before that work continues.
Compare your shortlist side by side
Give each firm the same brief, then record what its quotation, project examples and written terms actually show. Our printable three-firm worksheet keeps confirmed answers and unresolved questions in one place. It doesn't replace checking the contract.
Open the shortlist worksheet · Download the one-page PDF
HDB flat? See the detailed HDB scorecard and consultation questions.
How to read each profile.
Ask each firm to confirm the scope, completion and cost of any example that matches your home.
Score 91.4. Zenith Arc plans whole-home renovations around the way you live, bringing layouts, materials and built-in storage together. Its work spans contemporary minimalist, Japandi and farmhouse-inspired interiors, with details such as handleless cabinetry, arches and Peranakan tile accents. If you're looking for a luxurious home that feels personal, the approach gives as much thought to how rooms work together as to how they look.
Project example (as published on the firm's own website; checked 26 October 2026)
| Named project | 589 Woodlands Drive 16 (2025) |
|---|---|
| Property type | Resale HDB executive apartment |
| Floor area | 119 sqm |
| Scope | Itemised: wall hacking, tiling and flooring, false ceiling, feature wall, carpentry, plumbing and painting |
| Firm-published renovation cost | S$137,000 for that scope |
| Duration | 12 weeks |
| Exclusions | Listed: electrical works, lighting fixtures, air-conditioning, wallpaper, loose furniture and appliances, and bathroom accessories |
Firm's own statements (company claims):
How Zenith Arc handles variations (company practice):
Worth checking with this firm: the written warranty schedule for the materials you choose, since longer coverage applies only to selected materials.
| Score breakdown | reviews 18.0/25 · projects 13.4/15 · property types 15/15 · history 20/20 · transparency 25/25 |
|---|---|
| Website | zenitharc.com.sg |
| Official records | |
| Company | Zenith Arc Pte Ltd · UEN 201602351R |
| CaseTrust | Accredited (renovation businesses), valid to 29 May 2027 |
| BCA | CR06 grade L1, valid to 1 July 2027 |
| HDB Directory | Listed |
| Platform data (Qanvast, 11 October 2026) | |
| Qanvast | 4.79 from 163 reviews · 161 projects on profile |
| Links to the records | |
| Online records | Qanvast profile · BCA Directory record · CaseTrust and HDB: search their directories by UEN |
| Company-published information (firm's own website) | |
| Property types on own site | HDB, condo, landed and commercial service pages |
| Published on own site | Six-step design process · project costs on project pages · FAQs · handover warranty documentation |
| Style examples (firm's own labels) | Minimalist: 151 Cavenagh Road · "Minimalist, Japandi": 8A Upper Boon Keng · Wabi Sabi: Irwell Hill Residences · "Japandi Scandinavian": 517D Jurong West Street 52 · Modern Luxury: One Pearl Bank · Minimalist Farmhouse: 75B Redhill Road · Contemporary: 12 Serangoon Gardens Terrace · "Mid-Century, Modern": The Edge on Cairnhill · "Modern industrial, Scandinavian": 115A Alkaff Crescent · Modern Colonial: 589 Woodlands Drive 16 |
Score 90.0. Ovon Design creates practical, personal homes in styles from Scandinavian to wabi-sabi, with built-in storage and finishes chosen for everyday upkeep. In a Tampines 4-room flat, it paired dark wood, off-white laminates and muted green, and reworked a compact kitchen to fit the appliances. The firm says it shares mood boards and 3D visuals before work begins, which helps you settle the look early.
Project example (as published on the firm's own website; checked 26 October 2026)
| Named project | Grounded, 641A Tampines |
|---|---|
| Property type | 4-room HDB flat (BTO or resale not stated) |
| Floor area | 93 sqm (1,001 sq ft) |
| Scope | Not itemised |
| Firm-published renovation cost | $40,000, as listed on the firm's project page; scope not itemised |
| Duration | Not published |
| Exclusions | Not published |
Confirm the scope and current pricing with the firm.
Worth checking with this firm: how its e-warranty registration works and what the warranty covers.
| Score breakdown | reviews 18.9/25 · projects 13.1/15 · property types 15/15 · history 18/20 · transparency 25/25 |
|---|---|
| Website | ovon-d.com |
| Official records | |
| Company | Ovon Design Pte. Ltd. · UEN 201712182W |
| CaseTrust | Accredited (renovation businesses), valid to 2 June 2027 |
| BCA | CR06 grade L1, valid to 1 December 2027 |
| HDB Directory | Listed |
| Platform data (Qanvast, 11 October 2026) | |
| Qanvast | 4.83 from 168 reviews · 146 projects on profile |
| Links to the records | |
| Online records | Qanvast profile · BCA Directory record · CaseTrust and HDB: search their directories by UEN |
| Company-published information (firm's own website) | |
| Property types on own site | HDB, condo, landed and commercial service pages |
| Published on own site | Step-by-step renovation process (HDB, condo and landed pages) · project budgets in its articles · e-warranty registration page · FAQ page |
| Style examples (firm's own labels) | "Wabi-sabi, Minimalist": Mori · Japandi: Anzen · Wabi-sabi: Yohaku · "Scandinavian, Farmhouse": Timber Nest · Modern Luxe: Terra Luxe · Farmhouse: Ember Hours · Industrial: Brut · Contemporary: Atlas · "Vintage, Colonial": Chapters of Home · "Eclectic, Mid-century Modern": Chromatic |
Score 89.2. Urban Home Design combines light wood, soft palettes and built-in storage in calm, minimalist interiors, sometimes shaped around a cultural theme such as a Japanese ryokan or a Balinese retreat. Glass partitions, rounded edges and open layouts keep its homes bright and easy to live in. Its work spans HDB flats, condos, landed homes and commercial spaces, so you can compare designs across property types.
Project example (as published on the firm's own website; checked 26 October 2026)
| Named project | A Ryokan Retreat, Hougang Street (completed 2021) |
|---|---|
| Property type | 5-room HDB flat (BTO or resale not stated) |
| Floor area | 110 m² |
| Scope | Not itemised |
| Firm-published renovation cost | S$105,000, shown on the firm's project list rather than the project page |
| Duration | Not published |
| Exclusions | Not published |
Worth checking with this firm: completed homes by the designer who would handle yours, in your property type, as the company has the shortest history of the ten.
| Score breakdown | reviews 23.4/25 · projects 13.8/15 · property types 15/15 · history 12/20 · transparency 25/25 |
|---|---|
| Website | urbanhomedesign.com.sg |
| Official records | |
| Company | Urban Home Design Pte Ltd · UEN 202005941D |
| CaseTrust | Accredited (renovation businesses), valid to 8 April 2030 |
| BCA | CR06 grade L1, valid to 1 April 2028 |
| HDB Directory | Listed |
| Platform data (Qanvast, 11 October 2026) | |
| Qanvast | 4.99 from 402 reviews · 187 projects on profile |
| Links to the records | |
| Online records | Qanvast profile · BCA Directory record · CaseTrust and HDB: search their directories by UEN |
| Company-published information (firm's own website) | |
| Property types on own site | HDB and condo service pages; landed and commercial projects shown |
| Published on own site | Renovation process · project costs on its design page · after-sales support statement · FAQs |
| Style examples (firm's own labels) | "Scandinavian minimalist": Changi Rise · "modern minimalism with Japandi warmth": Tampines GreenCourt · "Japanese-style wabi-sabi": Elegant Zen Living · Scandinavian: Kampung Arang Road · "Industrial-themed": Toy Factory · Contemporary: Tampines Ave · "Biophilic Mid-Century Modern": Queen Street |
Score 88.0. Starry Homestead works across a wide range of styles, from Japandi and Scandinavian to Peranakan and wabi-sabi, and says its concepts come with 3D visuals and material palettes before work starts. Its made-to-measure carpentry shows in a Tengah flat, where light oak, shoji-inspired screens and a built-in window bench set a calm Japandi tone. With a range this broad, ask to see finished homes in the style you have in mind.
Project example (as published on the firm's own website; checked 26 October 2026)
| Named project | Garden Bloom @ Tengah |
|---|---|
| Property type | Listed among the firm's BTO projects; flat type not stated |
| Floor area | Not published |
| Scope | Not itemised |
| Firm-published renovation cost | Not published |
| Duration | Not published |
| Exclusions | Not published |
Worth checking with this firm: examples that match your flat type and budget, from its large portfolio.
| Score breakdown | reviews 19.3/25 · projects 15.0/15 · property types 15/15 · history 20/20 · transparency 18.8/25 |
|---|---|
| Website | starryhomestead.com |
| Official records | |
| Company | Starry Home Pte. Ltd. (trades as Starry Homestead) · UEN 201416585D |
| CaseTrust | CaseTrust Gold (renovation businesses), valid to 10 August 2030 |
| BCA | CR06 grade L1, valid to 1 July 2028 |
| HDB Directory | Listed |
| Platform data (Qanvast, 11 October 2026) | |
| Qanvast | 4.80 from 480 reviews · 402 projects on profile |
| Links to the records | |
| Online records | Qanvast profile · BCA Directory record · CaseTrust and HDB: search their directories by UEN |
| Company-published information (firm's own website) | |
| Property types on own site | HDB (BTO and resale), condo, landed and commercial project sections |
| Published on own site | Step-by-step process · cost ranges by property type · FAQs · no warranty duration found on its site on the check date |
| Style examples (firm's own labels) | "Modern, Farmhouse, Muji" (tagline "Where Zen Minimalist Meets Modern Farmhouse"): Jurong West St 42 · Japandi: Garden Bloom @ Tengah · Wabi-Sabi: Chempaka Court · Scandinavian: Kalidasa Avenue · Modern Luxury: North Gaia · "Modern Contemporary Luxe": Parc Clematis · Mid-Century: Bishan Street 22 · Colonial: Bukit Teresa Road |
Score 86.4. Eight Design describes a modern-to-contemporary approach and says it combines custom furniture from an in-house carpentry team with smart-home features such as voice-activated lighting. If built-ins or home automation matter to you, ask to see finished examples in your flat type.
Project example (as published on the firm's own website; checked 26 October 2026)
| Named project | Not published: its HDB renovation page has a gallery labelled as past BTO projects, but we didn't find an individually documented project |
|---|---|
| Property type | BTO (gallery heading) |
| Floor area | Not published |
| Scope | Not published |
| Firm-published renovation cost | Not published |
| Duration | Not published |
| Exclusions | Not published |
Worth checking with this firm: completed work beyond the 30 projects on its Qanvast profile, ideally in your property type.
| Score breakdown | reviews 17.4/25 · projects 9.0/15 · property types 15/15 · history 20/20 · transparency 25/25 |
|---|---|
| Website | eightdesign.com.sg |
| Official records | |
| Company | Eight Design Pte. Ltd. · UEN 201310463Z |
| CaseTrust | CaseTrust Gold (renovation businesses), valid to 6 August 2030 |
| BCA | CR06 grade L1, valid to 1 March 2028 |
| HDB Directory | Listed |
| Platform data (Qanvast, 11 October 2026) | |
| Qanvast | 4.74 from 218 reviews · 30 projects on profile |
| Links to the records | |
| Online records | Qanvast profile · BCA Directory record · CaseTrust and HDB: search their directories by UEN |
| Company-published information (firm's own website) | |
| Property types on own site | HDB, condo, landed and commercial service pages |
| Published on own site | Consultation-led process · cost ranges by property type · warranty and defect-rectification statement · FAQs |
Score 86.1. Fifth Avenue Interior works in many styles, including modern contemporary, mid-century modern, Japandi and wabi-sabi, across BTO and resale flats and condos. In one Japandi-mix BTO flat, deep timber tones, earthy colours and tactile materials give each room its own character within one overall look. If members of your household want different looks, ask how it keeps separate rooms connected.
Project example (as published on the firm's own website; checked 26 October 2026)
| Named project | The Samurai |
|---|---|
| Property type | 4-room HDB BTO flat |
| Floor area | 1,020 sq ft |
| Scope | Not published |
| Firm-published renovation cost | Not published |
| Duration | Not published |
| Exclusions | Not published |
Worth checking with this firm: if your project would run beyond 4 December 2026, that its CaseTrust accreditation has been renewed.
| Score breakdown | reviews 17.4/25 · projects 15.0/15 · property types 15/15 · history 20/20 · transparency 18.8/25 |
|---|---|
| Website | fifthavenue.com.sg |
| Official records | |
| Company | Fifth Avenue Interior Pte Ltd · UEN 201504177G |
| CaseTrust | CaseTrust-RCMA joint accreditation, valid to 4 December 2026 |
| BCA | CR06 grade L1, valid to 1 September 2027 |
| HDB Directory | Listed |
| Platform data (Qanvast, 11 October 2026) | |
| Qanvast | 4.72 from 398 reviews · 304 projects on profile |
| Links to the records | |
| Online records | Qanvast profile · BCA Directory record · CaseTrust and HDB: search their directories by UEN |
| Company-published information (firm's own website) | |
| Property types on own site | HDB, condo, landed and commercial project categories |
| Published on own site | Process (space planning onwards) · project costs in its project articles · warranty and after-sales statement · no FAQ section found |
| Style examples (firm's own labels) | Minimalist: Creamy · Japandi: Border · Wabi-Sabi: Hojicha · Scandinavian: Hygge · Modern Luxe: The Watergardens · Farmhouse: Lake Grande · Modern Industrial: Urban Brick · Modern Contemporary: Twin · Mid-Century Modern: Fluid · Colonial: Unbeatable |
Score 85.5. Space Atelier's portfolio includes modern contemporary, modern minimalist and Scandinavian interiors with clean lines. Its work ranges from BTO and resale flats to condos, landed homes and a penthouse. Projects are credited to named designers, which makes it easier to find one whose finished homes match the look you want.
Project example (as published on the firm's own website; checked 26 October 2026)
| Named project | 4 Room BTO @ Tampines Green Jade |
|---|---|
| Property type | 4-room BTO flat |
| Floor area | Not published |
| Scope | Not published |
| Firm-published renovation cost | Not published |
| Duration | Not published |
| Exclusions | Not published |
Worth checking with this firm: its CaseTrust status if your project would run beyond 14 November 2026.
| Score breakdown | reviews 16.7/25 · projects 15.0/15 · property types 15/15 · history 20/20 · transparency 18.8/25 |
|---|---|
| Website | spaceatelier.com.sg |
| Official records | |
| Company | Space Atelier Pte Ltd · UEN 201407904G |
| CaseTrust | CaseTrust-RCMA joint accreditation, valid to 14 November 2026 |
| BCA | CR06 grade L1, valid to 1 June 2028 |
| HDB Directory | Listed |
| Platform data (Qanvast, 11 October 2026) | |
| Qanvast | 4.69 from 410 reviews · 302 projects on profile |
| Links to the records | |
| Online records | Qanvast profile · BCA Directory record · CaseTrust and HDB: search their directories by UEN |
| Company-published information (firm's own website) | |
| Property types on own site | BTO, resale, condo, EC, landed and commercial project sections |
| Published on own site | "How we work" process · cost guides with budget ranges · FAQs · no warranty terms found |
| Style examples (firm's own labels) | Modern Minimalist: 4 Room BTO @ Tampines Green Jade · Modern Japandi: 4 Room BTO @ Tengah · Modern Wabi-Sabi: 2 Bedroom Condo @ Lentor Central · Modern Scandinavian: Resale 2 Room HDB @ Upper Street · Modern Luxury: 4 Room BTO @ Toa Payoh · Modern industrial: 4 Room BTO @ Punggol · Modern Contemporary: 4 Room BTO @ Bartley Walk · modern colonial: Resale 2 Bedroom Condo @ Boathouse |
Score 81.5. Juz Interior works in many looks, from Scandinavian and Japandi to wabi-sabi, eclectic and farmhouse, across HDB flats, condos and landed homes. Recent projects use rounded carpentry, warm wood and hidden storage, and a Tampines flat adds a whitewashed brick wall and ceiling beams that conceal the cabling. Several of its projects are published with their renovation cost, year and duration, which helps when you set a budget.
Project example (as published on the firm's own website; checked 26 October 2026)
| Named project | 648C Tampines St 62 (completed 2023) |
|---|---|
| Property type | New HDB flat (flat type not stated) |
| Floor area | Not published |
| Scope | Not itemised |
| Firm-published renovation cost | $56,200 |
| Duration | 12 weeks |
| Exclusions | Not published |
Worth checking with this firm: what its listed portfolio costs include, since each portfolio page shows one.
| Score breakdown | reviews 19.1/25 · projects 12.4/15 · property types 11.2/15 · history 20/20 · transparency 18.8/25 |
|---|---|
| Website | juzinterior.com |
| Official records | |
| Company | Juz Interior Pte. Ltd. · UEN 201312013K |
| CaseTrust | Accredited (renovation businesses), valid to 18 October 2027 |
| BCA | CR06 grade L1, valid to 1 January 2029 |
| HDB Directory | Listed |
| Platform data (Qanvast, 11 October 2026) | |
| Qanvast | 4.82 from 227 reviews · 113 projects on profile |
| Links to the records | |
| Online records | Qanvast profile · BCA Directory record · CaseTrust and HDB: search their directories by UEN |
| Company-published information (firm's own website) | |
| Property types on own site | HDB, condo and landed projects (no commercial service or project found) |
| Published on own site | Ten-step "How it works" · renovation cost on each portfolio page · FAQ page · no warranty terms found |
| Style examples (firm's own labels) | "Minimalist", "Muji" (tags): 458 Yishun Ave 11 · Japandi: 403A Toa Payoh 1 · Wabi Sabi: Kim Keat Ripples II · Scandinavian: 233A Upper Aljunied Parkview · Modern Luxury: Fernvale Vines · Farmhouse: 648C Tampines St 62 · Industrial: 302 Tengah Parc Point · Contemporary: 130A Toa Payoh · Mid Century Modern: 316 Tengah Parc Glen |
Score 81.3. Darwin Interior says it puts practicality and harmony ahead of flamboyance, with a process that runs from design and material sourcing to project management and final styling. In a Sumang Lane resale flat, a bright Scandinavian look came from choosing furniture, accessories and soft furnishings alongside the layout. If you want help furnishing as well as renovating, ask what styling is included.
Project example (as published on the firm's own website; checked 26 October 2026)
| Named project | Sumang Lane |
|---|---|
| Property type | 3-room resale HDB flat |
| Floor area | 68 sqm |
| Scope | Not itemised (presented as a before-and-after case study) |
| Firm-published renovation cost | Not published |
| Duration | Not published |
| Exclusions | Not published |
Worth checking with this firm: what its stated three-year warranty covers.
| Score breakdown | reviews 19.1/25 · projects 12.2/15 · property types 11.2/15 · history 20/20 · transparency 18.8/25 |
|---|---|
| Website | darwininterior.com.sg |
| Official records | |
| Company | Darwin Design & Developments Pte. Ltd. (brand: Darwin Interior) · UEN 201101102Z |
| CaseTrust | CaseTrust-RCMA joint accreditation, valid to 21 September 2029 |
| BCA | CR06 grade L1, valid to 1 May 2028 |
| HDB Directory | Listed |
| Platform data (Qanvast, 11 October 2026) | |
| Qanvast | 4.81 from 300 reviews · 101 projects on profile |
| Links to the records | |
| Online records | Qanvast profile · BCA Directory record · CaseTrust and HDB: search their directories by UEN |
| Company-published information (firm's own website) | |
| Property types on own site | States HDB, condo and landed work (no commercial service or project found) |
| Published on own site | Design process page · three-year warranty statement · FAQ · no project costs found on its own pages |
Score 80.2. Flo Design works under its own style labels, including "modern luxury", "quiet luxury" and "curvatures", alongside Scandinavian and contemporary designs, for HDB flats, condos and landed homes. The firm says its designs start from each client's lifestyle, with attention from fabric choices to furniture placement. Several projects are published with flat type and cost, so ask for photos and the scope behind any example close to your home.
Project example (as published on the firm's own website; checked 26 October 2026)
| Named project | 612 Bedok Reservoir Rd |
|---|---|
| Property type | 5-room resale HDB flat |
| Floor area | Not published |
| Scope | Not itemised |
| Firm-published renovation cost | $80,000 |
| Duration | Not published |
| Exclusions | Not published |
Worth checking with this firm: how it runs a project step by step, as we didn't find a published process on its site.
| Score breakdown | reviews 20.0/25 · projects 14.7/15 · property types 15/15 · history 18/20 · transparency 12.5/25 |
|---|---|
| Website | flodesign.com.sg |
| Official records | |
| Company | Flo Design Pte Ltd · UEN 201705883C |
| CaseTrust | Accredited (renovation businesses), valid to 23 June 2027 |
| BCA | CR06 grade L1, valid to 1 November 2028 |
| HDB Directory | Listed |
| Platform data (Qanvast, 11 October 2026) | |
| Qanvast | 4.85 from 306 reviews · 267 projects on profile |
| Links to the records | |
| Online records | Qanvast profile · BCA Directory record · CaseTrust and HDB: search their directories by UEN |
| Company-published information (firm's own website) | |
| Property types on own site | HDB, condo and landed service pages; commercial projects |
| Published on own site | Project costs on its portfolio list · FAQs · no process steps or warranty terms found |
| Style examples (firm's own labels) | Scandinavian: 612 Bedok Reservoir Rd · Modern Luxury: 556 Choa Chu Kang North 6 · Contemporary: 692B Choa Chu Kang Cres |
Qanvast SuperTrust (for context, not scored). SuperTrust is an annual Qanvast badge for top-rated firms. The counts include past years, so they don't show current status. Years awarded, as shown on each Qanvast profile:
| Firm | Years |
|---|---|
| Zenith Arc | 4 |
| Ovon Design | 4 |
| Urban Home Design | 7 |
| Starry Homestead | 11 |
| Eight Design | none shown |
| Fifth Avenue Interior | 11 |
| Space Atelier | 11 |
| Juz Interior | 4 |
| Darwin Interior | 5 |
| Flo Design | 5 |
Who could be included. A firm had to meet all of these on the check date:
| Check | What we required | Where we checked |
|---|---|---|
| Direct ID firm | Designs and delivers interiors for Singapore homes, with residential projects on its own website | The firm's website |
| CaseTrust | Current CaseTrust accreditation for renovation businesses (any scheme) | CaseTrust accredited business list |
| BCA | Current BCA registration under workhead CR06 (Interior Decoration & Finishing Works) | BCA Directory |
| HDB | Listed in HDB's Directory of Renovation Contractors | HDB Directory of Renovation Contractors |
| One company | The brand matches one legal company across the CaseTrust, BCA and HDB records | The same three registers |
We started with 49 firms on 3 October 2026. They were the firms named in the previous version of this guide, firms appearing in Singapore search results for “best interior designer” searches, and firms featured on Qanvast’s SuperTrust page. 22 met every check. No firm paid to be included.
A firm can be missing from the ranking for one of four reasons:
This is not a judgement of any firm’s work. Firms can ask us to re-check (see Corrections).
How each firm was scored (out of 100).
| Criterion | Weight | How it is measured |
|---|---|---|
| Homeowner reviews | 25% | Qanvast average rating, adjusted for the number of reviews so that a high score from a handful of reviews counts for less |
| Published projects | 15% | Number of Singapore projects on the firm's Qanvast profile |
| Property types covered | 15% | Service pages or completed projects for HDB, condo, landed and commercial on the firm's own website |
| Operating history | 20% | Years since the company's UEN registration year |
| Homeowner transparency | 25% | Whether the firm's own website explains its process, shows costs (project costs or price ranges), states its warranty or after-sales terms, and answers common questions |
Why these weights, and what happens if you change them.
The review sub-score shown in each firm’s records (out of 25) comes from this adjusted rating. It is not the raw Qanvast ranking.
Design taste is not scored, and nor are the Best-for notes, style labels or picker entries. Use each firm’s completed projects to judge style for yourself.
An award tells you that a project or firm met one organiser’s criteria in one year. It doesn’t replace checking current registrations, recent reviews, contract terms and comparable projects. Look at who organised it, the year and category, and whether it judged design or service.
Two organisers that publish their winners:
Qanvast’s SuperTrust is a platform badge based on homeowner ratings and operational reliability, not a juried design award. This guide doesn’t score awards.
Talking to Zenith Arc? If you would like us on your shortlist, book a consultation through our contact page or WhatsApp +65 9851 8810.
It depends on your property, scope, budget and priorities. Under this guide’s published method (eligibility checks plus five weighted criteria), Zenith Arc, the publisher of this guide, ranks first, followed closely by Ovon Design and Urban Home Design. Different priorities and weightings can produce a different order.
We screened 49 firms on 3 October 2026; 22 passed all the safety and eligibility checks: CaseTrust, BCA CR06, HDB Directory and matching company identity. The ranking puts those safety checks first, then scores each firm on what homeowners ask for most: homeowner reviews (25%), published projects (15%), property types covered (15%), operating history (20%) and homeowner transparency (25%). The ten highest-scoring firms from that eligible pool are listed.
A renovation budget is different from a design-only fee. Qanvast’s February 2026 projections put a 4-room BTO renovation at about S$50,000–S$60,000 and a 4-room resale HDB renovation at S$70,000–S$81,600; these are broad benchmarks, not a quotation for your home. Our interior design cost guide covers premium-tier full-service budgets and cost drivers, with a different scope, so the figures are not directly comparable.
Some do, and others include design in the renovation quotation. Ask each firm what the design stage covers (layout plans, 3D drawings, revisions), whether it is charged separately, and whether any design fee is credited if you go ahead with the renovation. Compare full quotations rather than design fees alone.
An ID firm designs the space and manages the trades that build it. A renovation contractor carries out work to someone else’s specification. Many Singapore ID firms do both, so when you compare quotations, check whether design and project management are included.
CASE says its accredited renovation businesses must use a standard renovation contract and protect deposits through a performance bond. Check the firm’s current accreditation and the contract and bond documents for the protection that applies to your project, alongside the payment, warranty and dispute terms.
Search the firm’s name or UEN in the CaseTrust list, the BCA Directory and HDB’s Directory of Renovation Contractors (links above). The company name and status should match your quotation. For warning signs to watch for, see how to avoid interior design scams.
Qanvast’s February 2026 guide estimates 8–10 weeks for a 4-room BTO or resale HDB renovation. Ask each firm whether its schedule includes design, approvals and material lead times, and get a project-specific handover date.
Resale flats may need hacking, disposal, rewiring, plumbing changes and surface repairs that new flats don’t. Ask for quotations that list removal, repairs and new work separately, so you can compare them.
Three to five is a practical starting point. Give each firm the same brief, floor plan and scope, then compare the quotations and proposed approach on the same basis.
This guide covers a selected candidate pool, not every firm in Singapore. A firm may not have been screened, may not have met or been verifiable against the eligibility checks on the check date, or may have scored outside the top ten. Absence is not a judgement of its work; firms can request a recheck through our contact page.
Corrections. Firms and readers can ask for a factual correction through our contact page. Tell us which section is affected and link an official source. We review supported corrections within five working days.
What this guide can’t tell you.
Sources and check dates:
Zenith Arc Pte Ltd · UEN 201602351R · 24 New Industrial Rd, #04-03 INSPACE, Singapore 536210
