You bought the terrace house. Good bones, unbeatable location, and a previous owner who clearly stopped caring sometime around 2009. Then the real question lands on the kitchen table: do you renovate what’s there, or knock it down and start fresh? That one decision shapes your budget, your timeline, and how many government bodies you’ll deal with this year. A proper landed property renovation Singapore project is far less about choosing tiles than most owners expect, and far more about what the authorities will actually let you build.

At Reno Bros, the landed jobs we take on tend to start the same way. People arrive convinced they want a full rebuild. Then they hear the cost and the timeline, and Addition & Alteration works suddenly look more sensible. Both routes are valid. You just need to know which one your project really falls into before you fall in love with a mood board.

A&A or Reconstruction: The Line That Decides Everything

This is the fork in the road, and Singapore draws the line fairly precisely. A&A (Addition & Alteration) means you keep a substantial part of the existing house and build around it. To stay on the A&A track, your additional gross floor area generally cannot exceed 50% of the existing approved GFA, and you must keep more than half of the existing external walls. Cross either threshold, add a storey, or shift major load-bearing structure, and you have walked into reconstruction territory.

Reconstruction means heavier review from both URA and BCA, a different cost base, and a longer runway. For a tired 1970s house with a cramped layout and low ceilings, a rebuild often beats patching an old shell. But pretending an ambitious A&A is “just renovation” is how people get caught halfway through with a stop-work order taped to the gate.

A few markers that usually push a project from A&A into reconstruction:

• Adding a storey or raising the roofline to gain habitable space
• Removing or rebuilding more than half the external walls
• Major changes to the structural frame, columns, or foundations
• Pushing GFA past the 50% mark against the approved figure

The Paperwork Nobody Warns You About

Here is the part that catches first-time landed owners off guard. You cannot submit your own plans. Any A&A or reconstruction needs a Qualified Person (QP), a registered architect, plus a Professional Engineer where structure is involved, to lodge the submissions. Their sign-off is what makes it legal.

Two bodies, two concerns. URA handles planning: GFA, site coverage, building height, setbacks, and keeping your design inside the permissible building envelope. BCA handles structural safety and code compliance. If your house shares a boundary with a neighbour, party wall considerations come in too, and that talk is far easier early than after you have cracked open a shared structure. Any rewiring still needs a Licensed Electrical Worker (LEW) to sign off.

Budget honestly for the professionals. QP and engineering fees typically run around 8% to 12% of construction cost, and it is not a line you get to shave off. Approvals usually take two to four months, depending on how clean your submission is. A QP who knows the envelope rules cold saves you a resubmission cycle, which can quietly swallow a month.

What a Landed Renovation Actually Costs

Numbers swing wildly, because “landed” covers everything from a light refresh of an intermediate terrace to a gut-and-extend on a semi-detached. The bands we see hold up in practice:

• Interior-led A&A (lighter touch): from around SGD 80,000 for cosmetic, finishes-focused work where the structure stays put
• Mid-range A&A on a terrace or semi-D: roughly SGD 120,000 to 250,000, often near SGD 180 to 300 per square foot of works
• Full gut renovation or rebuild: comfortably SGD 400,000 and up, once you factor in size, finishes, and any basement or pool works

Finishes move the needle hard. Sintered stone and large-format porcelain cost more than standard tiling, and a solid timber staircase runs a multiple of a laminate-clad one. A good Lamitak or EDL laminate carries a feature wall beautifully for a fraction of the price. What you cannot see, though, is where you should never chase the cheapest quote: waterproofing, structural reinforcement, drainage falls. Spend on the membrane, economise on the feature wall. Repainting a wall is cheap. Reopening a leaking one is not.

Realistic Timelines, Not Optimistic Ones

If a contractor promises you a finished landed home in three months, be sceptical. For A&A works, plan for a build period of roughly 6 to 12 months, and that is after design and approvals. Stack those on top, and a realistic A&A from first meeting to handover often runs the better part of a year. Reconstruction stretches longer still.

So where does the time go? Approvals first, then demolition and structural works, which for a three-storey terrace can run seven to nine months on the build side alone. Wet works and waterproofing need curing time and a 24 to 48 hour ponding test before tiling, and that stage cannot be rushed without inviting a leak later. After that come services, offsite carpentry, ceilings, painted finishes in Nippon or Dulux, and a defects round.

Frequently Asked Questions

Do I really need an architect, or can my contractor handle the submissions?

If your works fall under A&A or reconstruction, you need the architect. A Qualified Person must make the submissions, and a contractor cannot legally lodge the plans. Purely cosmetic interior work that touches no structure and adds no GFA may not need a submission at all. But the moment you move walls, change the footprint, or add floor area, the QP is non-negotiable.

Is A&A always cheaper than rebuilding?

Usually, though not always. A&A saves the cost of full demolition and a fresh foundation, and it tends to be faster. But if the existing structure is in poor shape, you can spend heavily just to reinforce an old shell, money that might have bought a better house had you rebuilt. We read the bones honestly first. Nobody wins from pouring SGD 200,000 into a frame that should have come down.

How long before I can actually move in?

For an A&A project, a year from first design meeting to keys is fair. Interior-only refreshes move faster, reconstruction takes longer. Anyone quoting a few months for a structural landed job is either skipping approvals or setting you up to be disappointed.

Getting It Right the First Time

Landed renovation rewards planning and punishes improvisation. The regulatory layer, the structural stakes, the scale: all of it means a strong project manager is worth more than the flashiest showroom. If you are weighing an A&A against a rebuild, look through our past projects, browse our renovation services, or reach us via the contact page. You can also message Reno Bros on WhatsApp, and we will tell you straight which path makes sense for your place.

Related Reads

• Condo Renovation Guide: Rules, Timelines and Design Wins
• Permit Guide for HDB Hacking, Wet Works and Renovation Approvals
• The 2026 Guide to Renovation Costs and Budgeting