# Waterproofing & Roofing in Singapore

For ceiling leaks in HDB flats caused by wear and tear, HDB's Goodwill Repair Assistance scheme pays 50% of the repair cost, with the upper and lower flat owners splitting the rest. If the upper flat's renovation caused it, that owner pays in full. Bathroom waterproofing alone typically costs about $500–$1,500.

## Key facts
- Listings: 24
- Matched to a government licence/register: 12
- Median years in business: 15

## Prices in Singapore
2026 estimates. Costs depend on whether tiles must be hacked, the size of the bathroom, and the waterproofing system used.

| Service | Typical price | Notes |
|---|---|---|
| Bathroom waterproofing membrane only | S$500–S$1,500 per bathroom |  |
| Waterproofing with hacking and retiling | S$3,100–S$4,700 per bathroom | Includes hacking, membrane and new wall and floor tiles |
| Full bathroom renovation | S$3,000–S$17,500 per bathroom | Scope and fittings drive cost |

## How to choose
- For HDB ceiling leaks, report to HDB first; HDB will investigate the cause and advise whether the Goodwill Repair Assistance scheme applies before you hire anyone.
- Ask the contractor how they will find the source (e.g. ponding test, moisture meter) before quoting a fix.
- Ask which system they use: full hacking and new membrane, or non-hacking methods such as overlay membranes or nano-injection.
- Get a written warranty on waterproofing specifically, not just on tiling.
- For bathroom hacking in HDB flats, use a contractor from HDB's Directory of Renovation Contractors with a permit.

## Red flags
- Quoting a fix without testing where the water is coming from.
- Sealing only the surface grout and calling it waterproofing.
- No warranty, or a warranty that excludes leaks.

## Listings (top 24)
- [Hydro-Seal Engineering Pte Ltd](https://lookup.sg/biz/hydro-seal-engineering-pte-ltd), Hougang · #03-78 Defu Lane 10 Block 30 · 14 min walk from Kovan MRT · BCA registered · registered 1995
- [Tat Soon Metal Works Pte Ltd](https://lookup.sg/biz/tat-soon-metal-works-pte-ltd), Sungei Kadut · 7 Mandai Link #10-10 · 19 min walk from Yew Tee MRT · BCA registered · registered 2003
- [Tong Seng Huat Engineering Pte Ltd](https://lookup.sg/biz/tong-seng-huat-engineering-pte-ltd), Sungei Kadut · 41 Kranji Way · BCA registered · registered 1986
- [Flux Solutions Pte Ltd](https://lookup.sg/biz/flux-solutions-pte-ltd), Bishan · 55 Serangoon North Ave 4 #02-11 S9 555859 · 4 min walk from Bishan MRT · BCA registered · registered 2011
- [Kind Building Services Pte Ltd](https://lookup.sg/biz/kind-building-services-pte-ltd), Sembawang · 11 Yishun Industrial Street 1 North Spring Bizhub #03-109 · 10 min walk from Sembawang MRT · BCA registered · registered 2010
- [Le Fong Building Services Pte Ltd](https://lookup.sg/biz/le-fong-building-services-pte-ltd), Serangoon · 50 Serangoon North Ave 4 #02-01 · 24 min walk from Tongkang LRT · BCA registered · registered 2012
- [B4 Water Leakage Specialist Pte Ltd](https://lookup.sg/biz/b4-water-leakage-specialist-pte-ltd), Serangoon · 50 Serangoon North Ave 4 #06-10 · 24 min walk from Tongkang LRT · BCA registered · registered 2015
- [Roof Doctors Pte Ltd](https://lookup.sg/biz/roof-doctors-pte-ltd), Yishun · 1 Yishun St 23, #05-14 YS-One · 15 min walk from Yishun MRT · BCA registered · registered 2011
- [Buildbest Roofing & Construction Pte. Ltd.](https://lookup.sg/biz/buildbest-roofing-and-construction-pte-ltd), Bukit Batok · Wcega Tower, 21 Bukit Batok Cres, #10-71 · 19 min walk from Bukit Batok MRT · BCA registered · registered 2016
- [Roofers Home & Decor Pte Ltd](https://lookup.sg/biz/roofers-home-and-decor-pte-ltd), Geylang · 6 Ubi Rd 1, #04-05 · 4 min walk from Macpherson MRT · BCA registered · registered 2022
- [2ezBuilders Pte Ltd](https://lookup.sg/biz/2ezbuilders-pte-ltd), Clarke Quay · 8 Ubi Rd 2 #04-30 Zervex Building · 4 min walk from City Hall MRT · registered 2019
- [A&A M&E Renovation Aluminium Metal & Stainless Steel Works](https://lookup.sg/biz/a-and-a-m-and-e-renovation-aluminium-metal-and-stainless-steel-works), Serangoon · 20 Ang Mo Kio Industrial Park 2A AMK TechLink · 22 min walk from Fernvale LRT
- [Best Solution Awning Roof Contractor Singapore](https://lookup.sg/biz/best-solution-awning-roof-contractor-singapore), Robertson Quay · #09-04 Thong Chai Building 50 Chin Swee Rd 169874 · 5 min walk from Chinatown MRT
- [Bestcoat Contract Services Pte Ltd](https://lookup.sg/biz/bestcoat-contract-services-pte-ltd), Sembawang · Admiralty St No.10 · BCA registered · registered 1995
- [SP Roofing Contractor Pte. Ltd. - Roofing, Waterproofing & Renovation Singapore](https://lookup.sg/biz/sp-roofing-contractor-pte-ltd-roofing-waterproofing-and-renovation-sin), Geylang · 368 Geylang Rd, Singapore · 8 min walk from Aljunied MRT
- [SingaporeMidas Awnings](https://lookup.sg/biz/singaporemidas-awnings), Clarke Quay · 1090 Lower Delta Road #04-06U · 2 min walk from Fort Canning MRT
- [The Roofing Specialist](https://lookup.sg/biz/the-roofing-specialist), Kovan · 33D Lowland Road · 1 min walk from Kovan MRT
- [Egner Building Technologies](https://lookup.sg/biz/egner-building-technologies), Clementi · 48 Toh Guan Rd E · 17 min walk from Jurong East MRT · BCA registered · registered 1995
- [Roofing Singapore Pte Ltd](https://lookup.sg/biz/roofing-singapore-pte-ltd), Bedok · Empire Technocentre, 30 Kaki Bukit Rd 3 · 8 min walk from Kaki Bukit MRT · registered 1990
- [Lee Wall Cladding & Roofing Pte Ltd](https://lookup.sg/biz/lee-wall-cladding-and-roofing-pte-ltd), Orchard · 1 Scotts Rd #24-10 Shaw Centre · 2 min walk from Orchard MRT · registered 2011
- [ODA Engineering Pte Ltd](https://lookup.sg/biz/oda-engineering-pte-ltd), Geylang · Paya Ubi Industrial Park, 51 Ubi Ave 1 · 6 min walk from Ubi MRT · registered 2022
- [High Tech Roofing Roof Waterproofing Contractor Specialist](https://lookup.sg/biz/high-tech-roofing-roof-waterproofing-contractor-specialist), Geylang · 627-A, Aljunied Rd, BizTech Centre, #01-04, singapore · 5 min walk from Mattar MRT
- [Asiatech Roofing and Waterproofing Pte Ltd](https://lookup.sg/biz/asiatech-roofing-and-waterproofing-pte-ltd), Serangoon · 5 ANG MO KIO INDUSTRIAL PARK 2A #07-24 AMK TECH II
- [Hightech Roofing Singapore](https://lookup.sg/biz/hightech-roofing-singapore), Ang Mo Kio · BizTech Centre · 4 min walk from Yio Chu Kang MRT

## By area
- Geylang: 4
- Serangoon: 4
- Clarke Quay: 2
- Hougang: 2
- Sembawang: 2
- Sungei Kadut: 2
- Ang Mo Kio: 1
- Bedok: 1
- Bishan: 1
- Bukit Batok: 1
- Clementi: 1
- Downtown Core: 1
- Kovan: 1
- Museum: 1
- Orchard: 1

## FAQs
### Who pays for a ceiling leak in an HDB flat?
If HDB finds the leak is due to wear and tear, its Goodwill Repair Assistance scheme pays 50% of the repair cost and the upper and lower flat owners share the remaining 50% equally. If the upper flat's renovation or a faulty pipe within it caused the leak, the upper flat owner pays in full. GRA covers the floor slab repair, not damaged fixtures such as carpentry.

### Who pays for a ceiling leak in a condo?
Condos follow the Building Maintenance and Strata Management Act. Under section 101(8), a leak through your ceiling is presumed to come from the unit above unless proven otherwise, so the upper owner is generally responsible for repairs. This differs from HDB's cost-sharing scheme. Your MCST can help arrange inspections between owners.

### How much does bathroom waterproofing cost in Singapore?
Applying a waterproofing membrane alone typically costs about $500–$1,500 per bathroom in 2026. If the old tiles must be hacked and replaced, waterproofing plus retiling is around $3,100–$4,700 per bathroom. Non-hacking methods approved by HDB, such as overlay membranes, can avoid retiling in some cases.

### Can leaks be fixed without hacking the toilet?
Sometimes. HDB has identified non-hacking repair methods, including a nanotechnology waterproofing system and an overlay waterproofing membrane system, as alternatives for residents who do not want to hack their toilet tiles. Whether they work depends on the leak's cause, so get the source diagnosed first.

## Sources
- 99.co: Tackling ceiling leaks and water seepage in HDB flats: https://www.99.co/singapore/insider/tackling-ceiling-leaks-water-seepage-hdb/
- MND written answer on resolving persistent water seepage in HDB flats: https://mnd.gov.sg/newsroom/speeches/view/written-answer-by-ministry-of-national-development-on-strengthening-capability-and-solutions-to-resolve-persistent-water-seepage-and-leakage-problems-in-hdb-flats
- SingSaver: Condo inter-floor water leakage, who pays: https://www.singsaver.com.sg/insurance/blog/condo-inter-floor-water-leakage-guide-singapore

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Source: Lookup (https://lookup.sg) · Data as of October 2026 · Listings compiled from Singapore government open data (data.gov.sg), OneMap and Overture Maps places. Free listings never show contact details; featured listings are labelled.