SingRank Singapore
Most landed renovation advice you will read online opens with a price per square foot. That is the wrong first question, and it is why so many landed projects stall before a single wall comes down.
A landed house renovation in Singapore is governed by an approval chain — URA planning permission, a BCA plan submission, and a Qualified Person to sign it — and that chain, not your finishes budget, sets your timeline. Owners who choose tiles first and discover the approval path second routinely lose months. Owners who work the other way round rarely do.
This article is about that chain. Not about what marble costs.
What counts as A&A works
A&A stands for addition and alteration — renovation of an existing landed house rather than demolition and rebuild. It covers extensions, internal reconfiguration, structural changes and re-servicing, while retaining the existing structure.
The distinction matters because A&A and rebuild sit on different regulatory tracks, carry different submission requirements, and cost differently. Getting the classification wrong at the start is the most expensive administrative mistake available to a landed owner.
Do I need URA approval to renovate my landed house?
If your works change the building's footprint, height, envelope or use, yes — you need planning permission from the Urban Redevelopment Authority. Purely internal, non-structural cosmetic work generally does not. The line sits at whether you are changing what the building is, not how it looks inside.
Structural changes may require planning permission from URA alongside plan submission to BCA, with a Qualified Person involved throughout.
The three-part approval chain, in order
Landed approval is not one form. It is a sequence, and the parts do not run in parallel by default:
- URA planning permission — governs what you may build: envelope, setbacks, height, gross floor area.
- BCA plan submission — governs whether the structure is safe to build as drawn.
- Qualified Person — a registered architect or professional engineer who prepares and submits the plans and carries professional accountability for them.
You cannot skip the third one. In Singapore a QP is not a formality or an optional consultant; the submission legally requires one.
What a Qualified Person actually is
A Qualified Person is a registered architect or professional engineer authorised to submit building plans to the authorities. They are personally accountable for the structural integrity of what they submit, which is why their fee is not the line to squeeze.
This is the judgment call we would give you plainly: engage the QP before you engage anyone about finishes. The QP's drawings define what is legally buildable. Every downstream decision — layout, budget, contractor scope — depends on that document existing.
Envelope control, in plain terms
Envelope control is the invisible box your house has to stay inside. It governs height, setbacks from the boundary, and how much gross floor area the plot may carry — and it is decided per plot, not per neighbourhood.
This is why "my neighbour built a second storey" is not evidence that you can. Their plot, their zoning, possibly their approval granted under different controls. Your QP reads your plot's parameters and tells you what your box actually is, and that number frames every design conversation afterwards.
Why the order of operations decides your timeline
Run the wrong sequence and here is what happens. You commission an interior concept, fall in love with it, then discover at the QP stage that the extension breaches envelope control. The design goes back. The approval clock restarts. You have spent money to learn a constraint that was published all along.
Run the right sequence and the constraint shapes the concept from day one. Same house, same rules, months of difference.
Who engages the QP, and when the fee lands
The owner engages the Qualified Person, not the contractor. That matters, because the QP's professional accountability runs to the authorities and to you — placing them under a builder's control would defeat the point of the role.
The fee therefore lands early, before construction pricing exists. Owners planning cash flow around a single "renovation budget" are often caught by this: design and submission costs precede the build, sometimes by months.
How long does landed renovation approval take?
Approval duration varies with scope and with how complete the first submission is. Simple internal A&A moves faster than anything touching envelope, GFA or structure. Resubmissions — triggered by incomplete drawings or a design that breaches a control — are the single largest source of delay.
The honest answer is that no one can quote you a date before your QP has seen the property and the plot's specific controls. Anyone who does is guessing.
What happens if you build without approval
Unauthorised works on landed property are not a paperwork problem that goes away. They surface at the worst possible moment — usually when you sell, when a buyer's lawyer asks for the approval records and finds a structure with none.
The practical consequence is that unapproved work can have to be regularised or removed at your cost, and the sale stalls until it is resolved. That risk is inherited, too: buy a landed property with unapproved additions and the problem becomes yours. It is worth asking the question during due diligence rather than discovering it during your own renovation.
Why there is no price on this page
You will not find a figure here, and that is deliberate.
Landed properties differ by plot, by age, by conservation status, by what a previous owner did without approval, and by what the QP finds when the drawings go in. A published landed price would do one of two things: understate your project and set up a variation order later, or overstate it and cost you a conversation you should have had.
Neither serves you. Tell us the property and we will tell you what it needs — after we have looked at it, not before.
What an old house spends money on that you cannot see
The largest cost items on an ageing landed property are almost never the ones owners budget for. Roof waterproofing, soil treatment and full plumbing overhauls sit behind finishes, and they are discovered rather than specified.
Treat contingency as a real line rather than an optimistic afterthought. A roof that needs re-waterproofing does not care that you allocated the reserve to a kitchen island.
Three water paths a flat does not have
Apartments have one wet-area problem. Landed houses have three: the roof, the external envelope, and — where one exists — the basement. Each has its own detailing, its own failure mode, and its own remedial cost.
The mechanism is the same one that produces inter-floor leaks in flats — water finding a path through a failed membrane — just with more surfaces to fail, and no management corporation to arbitrate it.
The advice we would push back on
The most common piece of landed renovation advice is to get three quotes and compare them. On landed work, that advice fails — and it fails for a structural reason, not a moral one.
Before a QP has produced approved drawings, three contractors are pricing three different assumptions about scope. The quotes are not comparable because the projects are not the same project. Comparing them tells you which contractor is most optimistic, not which is best value.
The fix is straightforward and it gives you the leverage back: get the drawings first, then send the same approved scope to every contractor. Now the quotes describe one project and the differences mean something.
What conservation status changes
Some landed properties sit within conservation areas, where façade, roof form and specific elements are controlled. If your property does, the constraint is not negotiable and it should be established before any design work begins. Your QP will identify this at the outset — another reason the QP comes first.
Structural work on an old house is a discovery process
Landed stock in Singapore spans decades of construction standards. Wiring, plumbing and structural detailing from an earlier era frequently do not match what the drawings suggest, and what is found on site changes the scope.
Budget for discovery as a line, not as a surprise.
Substrate problems look the same everywhere
Landed floors fail for the same reasons flat floors do: movement, moisture, and a screed that was never level. The symptoms are identical too. Our explanation of why tiles pop and lift applies directly, and on landed property the affected area is simply larger.
The same decision logic applies to the floor method, too — our breakdown of when hacking genuinely earns its cost against an overlay sets out the four conditions that decide it.
How landed differs from HDB and condo work
The three property types are genuinely different regulatory animals. HDB work runs on HDB permits and the licensed contractor directory. Condo work runs on MCST by-laws and, for structural change, BCA. Landed work runs on URA planning permission plus BCA submission plus a QP.
Our comparison of Singapore renovation laws across HDB and condo sets out the first two in detail, and our resale condo renovation guide covers how the MCST route works in practice.
Which contractor requirements apply to landed work
Landed work does not require an HDB contractor licence, because HDB does not regulate private property. What it requires is a contractor competent in structural and A&A works, operating under the QP's approved drawings, and appropriately registered with BCA for the scope involved.
Our guides to HDB licensed contractors and to construction contractors in Singapore explain which registration covers what, so you can match the requirement to your actual scope rather than assuming one licence covers everything.
Who does what on a landed project
Three roles, and confusing them causes most of the friction on landed jobs:
- The QP designs and submits, and is accountable to the authorities.
- The contractor builds what the approved drawings specify.
- The owner decides scope and finishes — inside the envelope the approvals allow.
An interior designer may sit alongside these, but a designer is not a substitute for a QP. Our guide to interior designer pricing and scope covers where that role starts and stops.
Before you brief a designer
Bring the QP's parameters to the first design conversation. A designer working without the plot's envelope, setback and GFA constraints will produce something beautiful and possibly unbuildable, and you will pay for the redesign.
Design and approval are not sequential enemies — a good designer works happily inside a known box. The problem is only ever the unknown box. For context on where the property-type differences begin, see our Singapore property guide covering flats through bungalows and our home renovation guide.
Verify your contractor's registration yourself
We are HDB Licensed, BCA Registered and hold BizSafe Level 3. Check it rather than believe it — BCA registration is publicly verifiable, and we wrote a step-by-step guide to verifying BCA registration so you can run the check on any contractor, including us.
On landed work this matters more than on HDB work, because the sums are larger and the structural exposure is real.
Wet areas and waterproofing on landed property
Landed houses have roofs, external walls and often basements — three water paths a flat simply does not have. Waterproofing scope on landed work is therefore broader than the bathroom membrane most owners are thinking of. Our guide to reading a waterproofing quote covers the questions to ask.
Neighbours, noise and party walls
Terrace and semi-detached houses share structure with the property next door, which makes party-wall works a conversation before they are a construction task. Noise rules for private property differ from HDB's, and the practical answer is early notice to neighbours. See our guide on how renovation noise complaints are handled in Singapore.
If you are buying the property first
The best time to understand a landed property's renovation constraints is before you commit to buying it. Envelope control, conservation status and plot ratio are knowable in advance and they materially change what the house can become. Our complete guide to buying property in Singapore and our guide for foreign buyers cover the acquisition side, including Singapore Land Authority approval for landed purchases.
A shorter version of everything above
Establish the classification. Engage a QP. Get URA planning permission and the BCA submission done. Then, and only then, price the build against approved drawings.
Every landed project we have seen go badly went badly because those four steps happened in a different order.
What to send us to get a real answer
We have worked on HDB, condominium and landed property renovation projects since 2017. For landed work specifically, the useful first conversation needs the property address, the age of the house, whether you already have a QP engaged, and what you are trying to achieve — extension, reconfiguration, re-servicing, or all three.
Send that and we will tell you what the approval path looks like for your property and what the build scope realistically involves. We do not publish landed prices, because a number without your drawings would be a guess. Ask us and you get an assessment instead.
WhatsApp or call +65 8784 8742, or email rcs@renovationcontractorsingapore.com. You can also look through our project gallery and our earlier essential guide to landed house renovations.
Frequently asked questions
Do I need URA approval to renovate a landed house in Singapore?
You need URA planning permission if the works change the building's footprint, height, envelope or use. Purely internal, non-structural cosmetic work generally does not require it. Structural changes typically require URA planning permission together with a BCA plan submission.
What is a Qualified Person and do I really need one?
A Qualified Person is a registered architect or professional engineer authorised to prepare and submit building plans, and personally accountable for them. For landed works involving structural change or submission to the authorities, engaging one is a legal requirement, not an option.
What does A&A mean in Singapore renovation?
A&A means addition and alteration — renovating and extending an existing house rather than demolishing and rebuilding. A&A retains the existing structure and works within it, which is what separates it from a demolition-and-rebuild project.
How much does a landed house renovation cost in Singapore?
We do not publish a landed price list, because cost depends on the approved drawings, the plot's controls and what the property's condition turns out to be. Send us the property details and we will assess it rather than quote you a number we cannot stand behind.
Why do older landed houses need a bigger contingency?
Because the largest costs are invisible until work starts: roof waterproofing, soil treatment and full plumbing overhauls. These are discovered during construction rather than specified at quotation, which is why contingency belongs in the budget as a line rather than a hope.
Should I get three quotes before starting a landed renovation?
Not before you have approved drawings. Without them, each contractor prices a different assumed scope, so the quotes are not comparable. Obtain the QP's approved drawings first, then send the identical scope to every contractor you are considering.
Disclaimer
This article is general information about the regulatory process for landed property renovation in Singapore and is not legal, engineering or financial advice. Renovation Contractor Singapore does not publish a landed price list; no figure in this article should be read as a quotation. Approval requirements, timelines and controls vary by property, plot and conservation status, and are determined by the relevant authorities — confirm your property's specific requirements with a Qualified Person and with URA and BCA directly. Requirements described reflect published guidance at the time of writing.
