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Not every renovation needs both bathrooms done at once. A single toilet renovation package suits a 3-room flat with one bathroom, or an owner upgrading a tired master bath in a larger flat. It costs far less than a full 2-toilet job and finishes in days. If you only need one toilet renovated, this guide covers the real 2026 prices, what overlay and hacking each include, and the HDB rules that apply to a single bathroom.
Key Takeaway
A single toilet renovation starts from S$5,500 with RCS, an HDB-licensed contractor (Licence HB-11-5877Z). Overlay suits a newer flat and completes in 3 to 4 days, while an older resale toilet needs hacking, new waterproofing, and a 48-hour water test.
You will know when a one-toilet job makes sense, what the package covers, and how overlay differs from hacking for a single bathroom. The sections below run through cost, scope, permits, and a day-by-day timeline for renovating just one toilet.
When a Single Toilet Renovation Makes Sense
A single toilet renovation fits two situations: a flat with only one bathroom, or a selective upgrade of one bathroom in a larger flat. You renovate what needs work and leave the rest, controlling cost.
One-Bathroom Flats Like 3-Room and 2-Room
A 3-room or 2-room flat carries a single bathroom, so a one-toilet package covers the whole flat in one job. This is the natural scope for a compact unit, whether a new BTO or an ageing resale. A 3-room owner pays for one bathroom, not a 2-toilet package sized for a larger flat. A single-toilet job also fits owners staging a renovation across phases. The trade-off: if your flat has two bathrooms, doing them separately costs more in total than a combined 2-toilet package, because each visit carries its own mobilisation, haulage, and setup.
Upgrading One Bathroom in a Larger Flat
Owners of 4-room and 5-room flats often renovate a single bathroom when the master ensuite dates faster than the common toilet. A selective upgrade refreshes the bathroom you use most without the cost of doing both. You target spend where it matters — refreshing tiles, a vanity, and a rainshower in the room you use daily. This suits a mid-life refresh rather than a full move-in renovation. The trade-off: matching a new master bath to an unrenovated common toilet can look uneven, so plan whether you want a consistent finish across both bathrooms eventually.
Single Toilet Renovation Cost in 2026
A single toilet renovation starts from S$5,500 with RCS. The method — overlay or hacking — drives the price more than anything else, because hacking adds demolition, new waterproofing, and a mandatory test.
RCS Single Toilet Price Range
A basic single toilet renovation runs S$5,500 to S$6,500 with RCS, while a premium single toilet with higher-end finishes runs S$7,500 to S$8,500. The scope covers one bathroom end to end: surfaces, sanitary ware, a shower set, a water heater, and accessories. An owner renovating one bathroom pays a fraction of a 2-toilet package, which starts from $10,290. For the full component breakdown across toilet scopes, see our toilet renovation cost guide. The trade-off: imported fixtures, a frameless screen, or a smart toilet each add a separate line, so the premium range climbs with the upgrades you select.
Overlay Versus Hacking for One Toilet
Overlay suits a newer flat with sound waterproofing, while hacking is mandatory for an older resale toilet with leaks or dated finishes. Overlay lays new tiles over the existing floor with no demolition, finishing in 3 to 4 days. Hacking strips the bathroom to bare structure, lays a new HDB-approved membrane, and runs a 48-hour water retention test. An older resale single toilet therefore costs more and takes longer than an overlay on a near-new flat. Check our flooring guide for surface options. The trade-off: overlay is cheaper but only works while the existing waterproofing holds, so a leaking toilet must be hacked.
What Drives Your Final Toilet Cost
Tile grade, fixtures, and the renovation method move a single toilet budget most. A bathroom runs roughly S$1,300 to S$2,600 for hacking and tiling alone in 2026, according to MoneySmart renovation cost data (2026), before fixtures and finishes. A hacked resale toilet therefore starts higher than an overlay, then climbs with each fixture upgrade. Treat the base figure as the floor, not the total. For a firm price, request an itemised quotation, because a single bathroom still carries the full cost of waterproofing and a water heater that a larger job spreads across two toilets.
What a Single Toilet Package Covers
A single toilet package delivers one complete, working bathroom: new surfaces, sanitary ware, and hot water. The scope matches the chosen method — overlay or hacking.
Tiling and Waterproofing
An overlay package lays new tiles over the existing finish, while a hacking package replaces the waterproofing membrane underneath. For overlay on a newer flat, the original membrane stays intact, so no water test is needed. For a hacked resale toilet, a new HDB-approved membrane is mandatory, followed by a 48-hour water retention test monitored for leaks. The waterproofing step is the single most important line in a resale toilet quote, because a failed test means redoing the work. The trade-off: skipping or rushing waterproofing to save cost risks an inter-floor leak, for which the homeowner is fully liable.
Sanitary Ware, Shower, and Heater
A single toilet package fits the full fixture set one bathroom needs to work. The scope covers a WC with soft-close seat, a basin with mixer tap, a shower or rainshower set, a storage or instant water heater, and accessories such as a towel rack and paper holder. The bathroom is fully usable at handover, not a shell awaiting a separate plumbing contract. A compact 3-room bathroom favours a space-saving layout. The trade-off: premium brands such as Grohe or Hansgrohe and a smart toilet are add-ons, so list any upgrade in the quote rather than assuming it sits in the base scope.
What a Single Toilet Package Excludes
A single toilet package covers one bathroom only, so a second toilet, the kitchen, or other rooms sit outside it. Relocating fixtures or changing the toilet footprint also moves the job beyond a standard package, because it triggers hacking and an HDB permit. An owner who later wants the second bathroom done pays a separate mobilisation, so weigh a single job against a combined 2-toilet package upfront. The trade-off: doing one toilet now and another later costs more in total than both together, but it spreads the spend, which suits a phased budget.
HDB Rules for a Single Toilet Renovation
A single toilet still follows the same HDB rules as a larger bathroom job. A licensed contractor applies for any permit and handles the waterproofing compliance.
When One Toilet Needs a Permit
Hacking tiles, replacing waterproofing, relocating plumbing, and installing a water heater all require an HDB permit, while overlay and like-for-like replacement do not. Only a contractor in the HDB Directory of Renovation Contractors can apply, and approval takes up to three weeks, according to the Housing and Development Board (2026). A hacked single toilet therefore needs a permit even though only one bathroom is involved. RCS handles every application under Licence HB-11-5877Z and uses BCA-registered waterproofing specialists. Verify any contractor on the official HDB directory before signing, because the owner stays liable for unauthorised works.
The 48-Hour Water Test on a Hacked Toilet
Any hacked toilet must pass a 48-hour water retention test before tiling proceeds, even for a single bathroom. The contractor floods the floor with 20 to 30mm of water and monitors it for two days, checking the ceiling of the neighbour below for any moisture. A resale single-toilet timeline includes this fixed waiting period that an overlay job skips entirely. The test is the proof your waterproofing works. The trade-off: a failed test means a full waterproofing redo adding one to two weeks, which is exactly why only a BCA-registered specialist should perform the membrane work.
Single Toilet Timeline and Comparing Quotes
An overlay single toilet finishes in 3 to 4 days, while a hacked resale toilet takes longer because of waterproofing and the water test. Planning happens before work begins.
How Long One Toilet Takes
An overlay single toilet runs about three to four working days from start to handover, covering surface prep, tiling, fixtures, and a final clean. A hacked resale single toilet stretches to one to two weeks, adding demolition, a new membrane, and the mandatory 48-hour water test. The method, not the size, sets your timeline for a single bathroom. Confirm whether your toilet needs overlay or hacking before booking. The trade-off: a backordered imported fixture can delay either method, so confirm stock before the start date to keep a short job on schedule.
Comparing Single Toilet Quotes
Compare quotes of equal scope, never headline prices, because a single bathroom still carries fixed costs that a cheap quote may hide. A quote that omits the water heater, waterproofing, or haulage is not cheaper once those items reappear. Two single-toilet quotes are only comparable when both list the same method, fixture grade, and inclusions. Our guide on how to read a renovation quotation shows the exact lines to check. Also confirm the contractor appears in the HDB directory and uses BCA-registered waterproofing specialists, especially for a hacked resale toilet.
FAQ: Single Toilet Renovation Package
How much does a single toilet renovation cost in Singapore in 2026?
A single toilet renovation starts from S$5,500 with RCS for a basic scope, rising to S$7,500 to S$8,500 for premium finishes. A 2-toilet package starts from $10,290 instead. The method matters most: a hacked resale toilet costs more than an overlay on a newer flat.
Can I renovate just one toilet in my HDB flat?
Renovating a single toilet is common, both for 3-room and 2-room flats with one bathroom and for owners upgrading one bathroom in a larger flat. You pay only for the bathroom you renovate. Doing two separately costs more in total than a combined 2-toilet package.
Should I choose overlay or hacking for one toilet?
Overlay suits a newer flat with sound waterproofing and finishes in 3 to 4 days. Hacking is mandatory for an older resale toilet with leaks or dated finishes, adding a new membrane and a 48-hour water test. A leaking toilet must be hacked, not overlaid.
Do I need an HDB permit to renovate one toilet?
A permit is required for hacking, waterproofing replacement, plumbing relocation, and water-heater installation, even for a single toilet. Overlay and like-for-like replacement need no permit. Only a contractor in the HDB Directory of Renovation Contractors can apply, and approval takes up to three weeks.
How long does a single toilet renovation take?
An overlay single toilet finishes in about three to four working days. A hacked resale single toilet takes one to two weeks, because it adds demolition, a new waterproofing membrane, and the mandatory 48-hour water retention test before tiling can proceed.
Renovate Your Single Toilet with a Licensed Team
Whether you have one bathroom or want to refresh just the master, a single toilet renovation is faster and cheaper than a full job. RCS renovates single toilets under Licence HB-11-5877Z, uses BCA-registered waterproofing specialists, and prices each line transparently from S$5,500. Explore our full toilet renovation packages or check credentials in our HDB licensed contractors guide. Request a free HDB renovation quote from our licensed team and refresh your bathroom sooner.
