Additional and Alteration Works (A&A) are common terms used in Singapore’s construction industry. A&A works refer to the renovation or alteration of an existing building or structure. In the context of interior design, A&A works can include the addition of new rooms or spaces, the removal of walls or partitions, and the installation of new fixtures or fittings.

At Zenith Arc, we specialize in transformative A&A and reconstruction works that breathe new life into interior spaces. Our skilled team of experts excels in delivering comprehensive solutions that revitalize outdated or damaged areas, bringing them up to modern standards while preserving their unique character. Whether it’s a residential property, commercial space, or hospitality venue, our reconstruction services are tailored to meet your specific needs and vision.


Frequently requested A&A works on Zenith Arc:

  • interior-design

    Interior Modifications

    Make impactful changes without disrupting the existing structure. Create stunning designs that enhance your space while adhering to guidelines that protect your deposit and future tenant satisfaction.

  • swimmer

    Swimming Pool

    Swimming pool construction doesn’t impact the structural integrity of your building. Enjoy the benefits of a pool without compromising the existing structure.

  • pond

    Backyard Ponds

    Tranquil water features not only create a peaceful ambiance but also serve as habitats for aquatic life. Experience the calming allure of a well-designed garden pond through our interior company’s services.

  • balcony

    Verandas and Balconies

    These extensions seamlessly blend the beauty of nature with your home, providing a perfect spot to relax and unwind. We’re specialized in creating captivating designs that transform these spaces into inviting retreats.

  • garage

    Porch and Garage

    We specialize in turning your porch into a cozy extension of your living space, complete with comfortable seating areas and charming décor. Additionally, if you require additional storage, a workshop, or a dedicated area to showcase your prized vehicles, our skilled team can customize a garage that perfectly suits your unique needs.

  • joist


    Transform this underutilized space into a functional and inviting area that adds value to your home. Whether you envision a cozy retreat, a home office, or extra storage, our expert team will create a customized design that maximizes the space and meets your specific needs.


Determine the Scope of the Project

We begin by clarifying all the things you want to be included in the reconstruction project. As an interior design company, it is also our job to advise you on important elements that should be part of the reconstruction works.

Create Master Design Plan

The scope is then translated into a design plan. This is intended to serve as the big picture and help our renovation contractors manage the project. You also get an idea of what to expect at the end.

Refine Design Per Budget

After your input and reassessment of budget requirements, we will fine-tune the design. This ensures we complete the job within your budget.

Get Working & Drawing Permits

We then get working on the drawings for your home or office building to understand the area of construction. We also get the required permits, so the process goes smoothly without violating any regulations.

Construction Starts

The actual work starts once we have all the designs and permits in place. We keep you updated on the progress and work fast without compromising on the quality of craftsmanship.

Project Complete

We review everything in our design plan to ensure we’ve covered the project scope properly. After confirmation we let you know that your new space is ready for review.


When considering Additional and Alteration Works (A&A) in Singapore, it’s essential to consult with us as the criteria and regulations can vary depending on your type of unit and more.

We are well-versed in the permits required by the Building and Construction Authority (BCA), the Singapore Housing and Development Board (HDB), and/or the Urban Redevelopment Authority (URA) for your specific project. Contact us today to ensure compliance and receive expert guidance for your A&A needs.


We’ll provide a detailed cost breakdown for A&A and reconstruction works, ensuring full transparency regarding the allocation of your budget. Throughout each stage of the interior design process, we keep you informed about expenses and their impact on your budget, empowering you to make informed decisions and effectively manage your financial constraints.


Tell us about your idea, and we will provide you with a non-obligatory quote.