How much does waterproofing cost in Singapore?
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Key takeaways
- Most waterproofing jobs in Singapore land between SGD 500–SGD 25,000 — known locally as waterproofing contractor.
- Waterproofing is unlicensed as a trade in Singapore, but bathroom, roof and facade waterproofing are common and inter-unit ceiling seepage is governed by a defined BCA inspection process between neighbouring units. Re-waterproofing a bathroom means hacking and re-tiling.
- Prices below are researched national ranges, updated July 2026 — not quotes.
Waterproofing prices by job size in Singapore
| Job size | Low | Typical | High |
|---|---|---|---|
| Wet-area / sealant (small) Bathroom re-waterproofing or small sealant job | SGD 500 | SGD 1,200 | SGD 2,800 |
| Roof / membrane system Roof or larger membrane waterproofing | SGD 2,000 | SGD 4,500 | SGD 9,000 |
| Full structural waterproofing Facade or full below-ground/structural system | SGD 6,000 | SGD 12,000 | SGD 25,000 |
Per-unit rates
| Unit | Low | Typical | High |
|---|---|---|---|
| per square metre | SGD 40 | SGD 80 | SGD 150 |
What affects the price
- Job size and scope — bigger or more complex jobs move you up the ranges above.
- Access and condition — hard-to-reach areas, older properties or neglected maintenance add labour time.
- Materials and quality level — where materials are involved, the grade you choose often matters more than labour.
- Urgency — same-day or out-of-hours work usually carries a premium.
- Where you live — large metros in Singapore typically run above the national range; smaller towns below it.
How to save
- Get at least three quotes and compare like-for-like scopes, not just totals.
- Be flexible on timing — off-peak slots are often cheaper.
- Bundle related tasks into one visit to spread call-out costs.
- Agree the scope in writing up front to avoid change-order surprises.
How to hire a waterproofing pro in Singapore
- Confirm the contractor is experienced with wet areas, roofs and inter-unit seepage
- Get the water source diagnosed — bathroom membrane, roof or facade ingress
- For HDB/condo seepage, check whether the town council or MCST is involved
- Ask for a written scope, product spec and guarantee
- Check the contractor's insurance and references
Red flags
- Surface coating pitched over an unaddressed leak
- No diagnosis of the seepage source
- Ignores inter-unit responsibility rules
- Company-only warranty with no backing
- Full payment up front
How Handld researches prices
These are researched estimates, not quotes and not our transaction data. We compile ranges from published sources — national statistics, trade bodies and incumbent cost guides — normalise them to SGD, and adjust city pages by a population-based cost tier. Last updated July 2026. Basis: Singapore waterproofing contractor listings, extrapolated from regional guides.
Frequently asked questions
Can I waterproof a basement myself?
Small sealant jobs on a minor damp patch are DIY-able, but below-ground waterproofing against groundwater pressure is specialist work — get it wrong and you trap water or flood the space. Full basement systems should be designed and installed by a qualified specialist.
What's the difference between damp proofing and waterproofing?
Damp proofing resists moisture and rising damp (like a damp-proof course in a wall); waterproofing resists liquid water under pressure, as in a basement below the water table. Below-ground and wet-area work needs true waterproofing, not just a damp treatment.
What waterproofing does a bathroom or wet area need?
Wet areas need a waterproof membrane behind tiles on floors and walls, correctly detailed at junctions and drains. In many countries this is regulated work with a standard to meet — a failed shower membrane is one of the most common and costly building defects.
Do I need a guarantee or warranty?
Yes — reputable structural waterproofing comes with an insurance-backed guarantee so the cover survives if the contractor ceases trading. Ask whether the guarantee is company-backed or independently insured, because a company-only warranty is worth little if they close.
How much does waterproofing cost?
It depends on the method and area. Internal sealants and damp-proofing for a small area are the cheapest option; cavity-drain membranes and tanking cost more; a full basement or below-ground waterproofing system is the most expensive, running into five figures. The cause of the water dictates the right system.
Why is my damp problem being oversold?
A common trap is a 'free survey' that always diagnoses rising damp and sells a chemical damp-proof course, when the real cause is condensation, a leaking gutter or bridged damp course. Get an independent, qualified diagnosis before paying for injected chemicals.
What does waterproofing cost in Singapore?
A bathroom re-waterproofing typically runs SGD 500-2,800, roof or membrane systems SGD 2,000-9,000, and larger structural jobs SGD 6,000-25,000.
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