When a client calls and says 'it's just a small A&A — extending the kitchen a bit, maybe a new balcony', we never take that at face value. Not because we don't trust you, but because we've seen too many 'small' jobs turn into full reconstructions once we actually measure the setbacks or open up a wall. Here's what we check before we even talk price, and why it matters more than whether your neighbour did the same thing.

Why 'Small' A&A Can Mean Different Things to URA and BCA

To most homeowners, 'small' means the physical size of the work. A 2-metre kitchen extension feels small compared to adding a whole storey. But to the authorities — and to us as your builder — what matters is whether the work changes your plot ratio, touches structure, breaches setbacks, or alters drainage. A 2-metre extension can trigger full submissions if it pushes you past your allowable GFA or breaks the 2-metre setback line. We've had clients surprised that their 'small' rear extension needed a Qualified Person's endorsement and a 6-week URA wait.

The first thing we do is pull your existing approved plans. If you don't have them, we request them from the authorities. We need to see what was approved versus what's actually built. On about half the landed A&A enquiries we get, there's already unapproved work on-site — a previous owner's balcony, a extended roof, a kitchen that crept past the original footprint. That changes everything, because URA won't approve new A&A on top of illegal existing work. You'll need to regularise first, and sometimes that means tearing things down.

Plot Ratio and GFA: The Hidden Limit

Your land has a maximum Gross Floor Area you're allowed to build, calculated from your plot ratio. If you're already at or near that limit, even a small extension won't fly. We calculate your existing GFA from the approved plans, add the proposed extension, and check it against your zoning limit. If you're over, the conversation shifts — you can't add, but you might be able to reconfigure. Or you accept that the work requires tearing something else down to stay compliant.

We've had clients who wanted a 10 sqm rear extension discover they were already 15 sqm over their allowable GFA from a previous owner's unapproved loft. In that case, it's not a small A&A anymore. It's a regularisation, possibly a partial rebuild, and definitely a longer timeline.

Structural Load: When a 'Non-Structural' Change Isn't

Clients often tell us 'we're not touching structure, just extending outward'. But if you're extending a floor slab, adding a balcony, or putting a new roof over an existing space, you're adding load. That load has to go somewhere — through columns, beams, footings. We check whether the existing structure was designed to take it.

On older landed homes — anything built before the 1990s, especially — the original structural drawings often don't exist, or the work was done without proper engineering. If we're adding load, we may need to do a structural assessment first. That means opening up finishes to locate beams, testing concrete strength, checking rebar. It's not expensive relative to the whole job, but it's not instant. And if the existing structure is under-spec'd, we're into strengthening works — steel brackets, micropiling, underpinning.

We saw this on a terrace house in the east where the client wanted to cantilever a small balcony off the second storey. Sounded simple. But the existing external wall turned out to be a partition, not load-bearing, and the floor slab was already deflecting. We ended up installing two new steel columns down to the foundation and retrofitting the slab. Still doable, still worth it for the client, but not the 'quick two-week job' they'd imagined.

Load-Bearing Walls vs Partitions

If your A&A involves knocking down a wall, we check whether it's load-bearing before we quote. On paper plans, it's not always obvious. On site, we look for beam connections, wall thickness, alignment with columns above and below. If it's load-bearing and you want it gone, we install a beam to carry the load instead. That's steel or reinforced concrete, engineered, with temporary propping during works. It changes cost and time, and it absolutely requires a PE's endorsement.

We don't guess. If there's doubt, we open a small section or we assume load-bearing and price conservatively. We've never regretted being cautious here.

Setbacks, Boundaries, and Why Your Neighbour's Extension Doesn't Legalise Yours

URA's setback rules — typically 2 metres from the boundary for the main building, sometimes less for minor structures — are the most common blocker for 'small' A&A. Clients see their neighbour's rear extension and assume it's legal. Often it's not. Or it was approved under older rules. Or it's a minor overhang that URA allows case-by-case but won't approve for you without a formal waiver request.

We measure your existing setbacks with a laser measure and cross-check against your approved plans and the cadastral boundary. If your proposed extension breaches the setback, we tell you upfront. You can apply for a waiver, but URA grants them selectively and never guarantees. We've seen waivers approved for 0.5-metre encroachments on rear setbacks where there's no neighbour impact. We've also seen outright rejections for side setbacks, especially on corner lots.

The worst situation is when a client has already started work based on what their neighbour did. We've been called mid-construction to 'just finish it off', only to find the footings are 0.8 metres into the setback. At that point, you're into enforcement risk. We don't continue unapproved work. Ever. You'll need to apply for retention or demolish and rebuild compliant. Both cost more than doing it right the first time.

Drainage, Soil, and the Things You Can't See

If your A&A adds roofed area or impermeable surface, you're changing site drainage. PUB requires you to manage stormwater on your own land — no increase in runoff to the public drain. For small A&A, that might mean adding a rainwater harvesting tank, improving soil permeability elsewhere, or installing a detention system. We flag this early because drainage solutions take space. If your land is tight, it affects where you can build.

We also check for existing drains and utilities below your proposed extension. On older landed plots, the sewer lateral, stormwater drains, and sometimes old septic soakaway pits aren't always where the plans say they are. We've dug trial pits on rear extensions and found a live sewer line exactly where the client wanted a column footing. That's relocatable, but it adds cost and requires PUB approval.

Soil Conditions and Shallow Foundations

For ground-floor extensions, we consider soil bearing capacity. Most of Singapore's landed areas have reasonable soil, but if you're near reclaimed land, coastal areas, or old mining sites, we may need deeper footings or piling even for a small extension. We check the original site investigation report if available, or we budget for a few rounds of soil boring if the extension is substantial. It's rare for truly small A&A, but when it's needed, it's non-negotiable.

What Happens After We Check

Once we've done the above, we know whether your 'small A&A' is actually small, or whether it's tipped into something bigger. If it's genuinely straightforward — compliant setbacks, no structural changes, existing approvals all in order — we can quote firm and move fast. Submission to URA is streamlined, BCA structural plan approval is minimal or waived, and you're looking at 8-12 weeks from go-ahead to completion, depending on scope.

If checks reveal complications, we give you options. Sometimes it's a minor redesign — shift the extension inward 0.5 metres to clear the setback. Sometimes it's a staged approach — regularise first, then extend. And sometimes, honestly, the complications mean the job isn't worth doing as A&A, and you're better off considering a full rebuild or a different design altogether. We've walked clients through that conversation more than once. It's not the answer they wanted, but it's the accurate one, and it saves them from throwing money at a project that will never get approved.

Our In-House QP and Submissions

Because we have a Qualified Person in-house, we handle the URA and BCA submissions as part of the build. You're not coordinating between architect, engineer, and builder. We do the checks, we draft the submission drawings, we apply, we respond to authority queries, and we build to the approved plans. It's faster and there's no finger-pointing if something needs revision. When the authorities ask for a detail clarification or a revised drainage proposal, we handle it same-day, because the person who signs the drawings sits three desks away from the person pricing the steel.

When to Call Larry Contractors Instead

If your A&A is really about interior changes — hacking tiles, moving partition walls that aren't load-bearing, re-doing finishes, upgrading M&E — that's not our scope. We're builders, not renovators. Our sister company, Larry Contractors, is HDB-licensed for renovation and finishing works. They handle everything that doesn't involve structure, foundations, or authority submissions. If you're not sure where the line is, call us anyway and we'll point you in the right direction. No one benefits from the wrong contractor doing the wrong scope.

Frequently Asked Questions

Can I just extend my kitchen without approval if it's under 2 metres?

No. Any extension to your building footprint requires URA approval, regardless of size. The 2-metre figure you're thinking of is likely the setback requirement, not an exemption threshold. We've seen homeowners assume small extensions are allowed without approval — they're not. URA enforcement is real, and you'll be required to apply for retention or demolish. We don't build unapproved work.

My neighbour extended rearward and it looks like it's within the setback. Can I do the same?

Maybe, but don't assume. Your neighbour's extension might have been approved under older rules, or with a waiver, or it might be unapproved. We check your specific site conditions, cadastral boundary, and current URA guidelines before advising. What was approved for one property isn't automatically approved for another, even on the same street.

How long does a small A&A take from enquiry to completion?

If it's genuinely straightforward and all existing work is approved, we're looking at roughly 2-3 weeks for us to complete checks and drawings, 4-6 weeks for URA approval, and then 6-10 weeks build time depending on scope. So about 3-4 months total. If we find complications — unapproved existing work, structural issues, setback breaches — add time for regularisation or redesign. We give you a realistic timeline after the initial checks, not before.

Do I need an architect and an engineer separately, or does Wong Lye handle that?

We have both in-house. Our Qualified Person handles architectural submissions to URA and structural submissions to BCA. You deal with us, one contract, one coordination point. It's faster and cleaner than engaging separate consultants, and it means the person designing the work understands how we're going to build it.

What if I've already done some unapproved work and now want to extend further?

We'll need to regularise the existing unapproved work first before URA will approve any new A&A. That means applying for retention if it's compliant, or removing it if it's not. We can guide you through that process, but it adds time and cost. The earlier you flag it, the more options you have. We've sorted out plenty of these situations — it's fixable, but it's never faster or cheaper than doing it right from the start.

If you're planning any A&A work — small or otherwise — talk to us before you commit to a design or a budget. We'll check what actually needs checking, tell you what's possible, and give you a fixed-price quote based on reality, not assumptions. Message us on WhatsApp at +65 9107 2601 and we'll arrange a site visit.