# Waterproofing Cost Singapore 2026: Toilets, Ceilings, Roofs, Spalling | Seepwise

> Waterproofing cost in Singapore for 2026: published ranges for toilet waterproofing, hacking, spalling repair, and why roofs and leaks are quoted after inspection.

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# How Much Does Waterproofing Cost in Singapore (2026)?

Updated 2026-10-10 · by Seepwise 

 Short answer: Published 2026 contractor guides put a toilet waterproofing package (membrane, screed and ponding test) at about S$800 to S$2,500 per toilet, plus about S$800 to S$1,500 for hacking and disposal. Spalling patches were quoted from about S$300 to S$1,200 in 2017. Landed roofs have no reliable published rate and are priced after inspection. GST and re-tiling may be extra. 
[Seepwise](/) writes these guides from HDB, MND and BCA sources and published Singapore price data; each claim links to where it comes from. 

## Published ranges, by job

 Job Published range Source 
 Toilet waterproofing package (membrane, screed, ponding test) S$800 to S$2,500 per toilet 2026 contractor guides ([Triton](https://www.tritoncon.sg/blog/waterproofing-cost-singapore), [PRDT](https://www.prdt.com.sg/blog/bathroom-renovation-cost-singapore/), [Hock Star](https://hockstar.sg/bathroom-renovation-cost-singapore/)) 
 Hacking and disposal S$800 to S$1,500 per bathroom Same 2026 guides 
 Hacking and disposal, by area about S$3 to S$8 per sq ft [Smart Calculator](https://www.smartcalculator.sg/housing/flooring-cost-calculator), Jul 2026 
 Screeding, by area about S$1 to S$3 per sq ft [Smart Calculator](https://www.smartcalculator.sg/housing/flooring-cost-calculator), Jul 2026 
 Full HDB toilet renovation about S$5,000 to S$8,000 [MoneyBees](https://themoneybees.co/blog/hdb-toilet-renovation), 2026 
 Spalling concrete patch to whole toilet ceiling about S$300 to S$1,200 [PropertyGuru](https://www.propertyguru.com.sg/property-management-news/2017/1/144444/fix-spalling-concrete-before-it-becomes-a-serious-problem), 2017 (older) 
 Landed roof waterproofing No reliable published rate Priced after inspection 

These are published market figures from contractors and calculators, not our prices. Your quote depends on the inspection. 

## What changes the price

- Hacking or not. Hacking and disposal can match the cost of the waterproofing itself.

- Area and shape. More floor and more wall upturn means more membrane.

- Substrate condition. Cracked or uneven slabs need repair before any membrane.

- Tiles. Re-tiling is often quoted separately.

- Access and floor. Lifts, debris removal and working hours in condos.

- GST. Ask whether 9% GST is in or out.

## Cost by situation

- One leaking HDB toilet, old flat: a waterproofing package plus hacking, shared with your neighbour if the leak is into their ceiling, possibly with HDB’s Goodwill Repair Assistance co-paying half. See who pays.

- New BTO with a leak: report to HDB; the 5-year warranty may cover it.

- Spalling in the bathroom ceiling: a patch repair, or GRA at 50%.

- Landed flat roof: inspection first; the substrate decides.

Get a personalised range with the [waterproofing cost estimator](/tools/waterproofing-cost-estimator/). 

## Bottom line

For a toilet, budget the published S$800 to S$2,500 package plus S$800 to S$1,500 for hacking, and check GST and tiles. For leaks and roofs, the price follows the inspection. [Request an inspection](/contact/#request) for a quote on your actual job. 

Want this checked at your home? 
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A specialist will contact you on the number you gave. If water is near electrics, switch off that circuit at the distribution board and keep clear until then. 

## More questions

 Why do waterproofing quotes vary so much? + 
Scope. Some quotes include screed, hacking, tiles and GST; others do not. Compare line by line. Is GST included in waterproofing quotes? + 
Not always. Guides flag 9% GST as a common hidden cost, so ask. Can I get a price without an inspection? + 
For a toilet package, an indicative range. For a leak or a roof, the source and substrate decide the price, so expect a quote after inspection. [Related serviceToilet waterproofingA wet area that stays dry for years needs three things done in order: membrane, screed, test.](/toilet-waterproofing/) 

Related guides 
- Hacking vs Non-Hacking Waterproofing: Which Fixes Your Leak?
- Do You Need an HDB Permit for Toilet Waterproofing?
- What Is a Ponding Test, and Why Does It Matter?
- How Much Does Toilet Waterproofing Cost in Singapore (2026)? 

Get the source found and the rules applied to your leak. 
A specialist calls you back to book an inspection. Tell us what you see and the type of home. 
 [Request an inspection](/contact/#request)