How much do A&A works cost for a landed house in Singapore?

The cost comes down to how much you are adding and whether the work is structural or only a replan of the inside. The state of the existing house matters too, along with how much has to come out and be put back, the finishes you pick, and access. A middle terrace with one narrow front is slower and dearer to work on than a detached plot a lorry can drive into. We walk the house first, then price the actual job.

Do A&A works need URA and BCA approval?

The qualified person checks the actual proposal against URA planning and BCA building-control requirements, including any applicable exemptions. Where structural submissions and a permit to carry out structural works are required, plan approval alone is not permission to start. We coordinate that professional team and the paperwork. Approval timing depends on the proposal and the authority review.

How long do A&A works take?

Longer than most people expect, and it depends on the scope. A replan of the inside can be a smaller job, while a large structural extension involves more work, with design and approval time on top of the build. Approval timing is set by the authorities, not by us. We give you a proper schedule once the drawings are done, rather than a confident number on the first call.

Is A&A cheaper than tearing down and rebuilding?

Often, but not always. Extending may retain suitable parts of the structure and services, reducing replacement work. Retention of previously approved non-conforming structures is subject to URA conditions and professional assessment; it is not an automatic benefit of calling a project A&A. Rebuilding wins when the house is in poor shape, when the layout you want means gutting it anyway, or when your plot allows a much bigger house. We compare both for your house before we quote.

Do I need to appoint an architect or engineer myself?

No. We bring in the architect and, if the work is structural, the engineer, so you do not have to go and find them. They sit inside the same contract as the build, which means the drawings and the site are not two separate conversations for you to referee. The architect still answers to the authorities independently, and that is a protection for you, not for us.

Can I add a storey or an attic to my existing landed house?

Possibly, subject to the planning envelope and a structural assessment. The two proposals have different planning implications: URA classifies an additional storey as reconstruction, while an attic addition may qualify as A&A if it meets the applicable criteria. The qualified person checks the form and allowable envelope, and the engineer assesses the existing structure and any strengthening needed before the layout is fixed.

Can I extend a terrace or semi-detached house at the rear or the side?

An extension may be possible, depending on the plot and proposal. Rear and side options need separate setback, boundary and structural checks. How far you can go depends on the space that must stay clear behind you, the ground level, any drain running there and what sits on the boundary. A middle terrace has shared walls on both sides, and a shared wall holds up two houses, so cutting into it affects next door too. We check the boundary and the shared walls early.

Do I need to move out while the works are running?

For structural work, usually yes. Hacking, demolition and structural roof work can be noisy and dusty, the power and water go off at times, and an empty house is far easier to keep safe. A replan kept to one part of the inside can sometimes be done in stages while you stay put. We tell you which one your job is at the site visit, rather than saying you can stay and then asking you to move halfway through.

Extend your home without knocking it down

A&A Works

A&A works can include qualifying extensions, attic additions and layout changes to an existing landed home. URA treats an additional storey as reconstruction, so the qualified person checks the correct classification before the design is fixed. We coordinate the architect, engineer and build, check the existing structure, and establish the approvals and permits needed before the relevant work starts.

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Why Choose Us

What You Get

One Contract, One Company

We are the main contractor, not a middleman. The architect, the engineer, the trades and the site all sit under one contract with us, so you have one number to call and one company answerable for the result.

We Deal With the Authorities

The qualified person checks which planning and building submissions apply, and the engineer handles the structural scope. We coordinate the drawings, authority responses and required approvals and permits before the relevant works begin.

We Check the House First

Older landed homes hide surprises: shallow foundations, crumbling concrete, a wall shared with next door. We look at what is actually there before the design is fixed, not after demolition has started.

Detailed for the Rain

The junction between old and new is where leaks start. New roofs, extensions and openings get proper falls, flashings, gutters and waterproofing where they meet the existing house, because Singapore rain finds anything less.

Options

Materials & Systems

Concrete Frame

A structural option for extensions, wet areas and roof works where specified by the engineer. The existing foundations and structure must be assessed for the proposed loads.

Steel Frame

Lighter than concrete and quicker to put up. Useful for a rear room or an attic, and on tight terrace plots where a crane or a lorry cannot get close.

Lightweight Walls

Light block or steel studs with cement board, for replanning rooms and for new walls upstairs. Much easier on an existing floor than brick.

Aluminium Doors and Glazing

Sliding doors, screens and roof glass for a new extension, chosen for driving rain and built with proper drainage channels rather than relying on sealant.

How It Works

Our Process

We Come and Look

We walk the house with you. We look at the structure, the roof, where your boundary runs and where the pipes and cables sit, and we get clear on what you want the house to do. Free, and you owe us nothing afterwards.

We Work Out What Is Possible

The architect checks what your plot allows and the engineer checks what your house can carry. This is also where we compare extending against rebuilding, and tell you honestly which one your house is better suited to.

We Get It Approved

The architect draws the job up and files it with URA and BCA, with the other agencies where the work pulls them in. We put the drawings together and answer whatever comes back. How long this takes is not ours to set, so we will not give you a date we cannot keep.

We Build It

We board up the site and sheet over whatever we are not touching. Then demolition and hacking, then the structure, roof and outside walls, then wiring, plumbing and aircon, then finishes. One team, one schedule, regular updates.

We Sign Off and Hand Over

The architect gets the completed work signed off with the authorities. Then we walk the house with you, list anything that needs putting right, fix it, and hand you the approved drawings and paperwork for your records.

Real people, real care

What working with us looks like

A thorough, free site assessment. We measure and plan around your home.

Careful, protected work by people who take pride in the finish.

A proper walkthrough and handover. We see it through to the end.

Common Questions

A&A Works FAQ

A&A means additions and alterations, but the planning category has specific criteria for added floor area and changes to walls, structure and roof. Qualifying extensions and attic additions can fall within it. An additional storey is classified by URA as reconstruction even when much of the house remains. The qualified person checks the proposal against the current criteria before we settle the scope.

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Resources

A&A Works Guides

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