20 Best Waterproofing Contractors in Singapore

Leaks from a bathroom or roof are the kind of problem that drags on, and in a flat they can turn into an argument with the neighbours fast. Good waterproofing is mostly invisible when it's done right, which is exactly why it's worth picking the contractor carefully.
The firms on this list hold BCA's waterproofing installation workhead, CR09. We ranked them on their CR09 grade, years since incorporation, how many other BCA registrations they hold and how complete their public record is. Most hold CR09 at L1, so the other criteria do alot of the sorting here.
How this list was ranked
Each firm gets 0 to 5 points on four things, multiplied by a weight: BCA CR09 (Waterproofing Installation) grade ×4, years since incorporation ×2, other BCA workheads ×2, and how complete its public record is ×1. The total is scaled to 10. We checked 33 firms and show the top 20. Google reviews are shown as not checked until we've checked them for every firm here. Full method
Quick comparison
| # | Company | Area | Score |
|---|---|---|---|
| 1 | Seng Foo Building Construction Pte. Ltd. | Bukit Batok | 8.7 |
| 2 | Excell Enterprise Pte. Ltd. | Yishun | 6.9 |
| 3 | Witflux Engineering Pte. Ltd. | Yishun | 6.9 |
| 4 | Ab Associates Pte. Ltd. | Woodlands | 6.7 |
| 5 | Diamond Glass Enterprise Pte. Ltd. | Bedok | 6.2 |
| 6 | Mutiara (FE) Pte. Ltd. | Tuas | 6.0 |
| 7 | Bestlink Construction Pte. Ltd. | Sembawang | 5.8 |
| 8 | Envirotec Controls (Asia Pacific) Pte. Ltd. | Serangoon | 5.8 |
| 9 | Buildfolio Global Pte. Ltd. | Woodlands | 5.3 |
| 10 | Inn Interior Enterprise Pte Ltd | Clementi | 5.3 |
| 11 | Fibrwrap Construction Pte. Ltd. | Bukit Merah | 5.3 |
| 12 | Lee Hong Lee Construction Pte. Ltd. | Sungei Kadut | 5.3 |
| 13 | I Design & Build Pte. Ltd. | Tampines | 5.3 |
| 14 | Alliancz International Pte. Ltd. | Geylang | 5.3 |
| 15 | Skyler Construction Pte. Ltd. | Geylang | 5.3 |
| 16 | Galaxy Studio Interior Pte. Ltd. | Woodlands | 5.3 |
| 17 | Wsh Experts Pte. Ltd. | Kallang | 5.3 |
| 18 | Acolite Construction (S) Pte. Ltd. | Geylang | 5.1 |
| 19 | Dezign Format Pte Ltd | Sembawang | 5.1 |
| 20 | Regius Construction & Civil Engineering Pte. Ltd. | Serangoon | 5.1 |
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The ranking
Seng Foo Building Construction Pte. Ltd.
8.7/10Based in Bukit Batok in the West region, Seng Foo Building Construction has 38 years on ACRA's books (incorporated 1988). Its CR09 registration is grade L4 and it also carries 4 other BCA workheads. When we checked its website it described renovation, fit-out work.
- Registered address
- 2 Bukit Batok Street 23 #02-01 Bukit Batok Connection, Singapore 659554
- UEN
- 198801331R
- Incorporated
- 1988 (38 yrs)
- BCA CR09
- Grade L4, valid to 1 January 2027
- Other BCA workheads
- CW01 B1, CW02 C3, ME05 L1, ME06 L1
- HDB DRC listed
- No / not on record
- Office phone
- +65 6562 2235
- Website
- sengfoo.com
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade4 × 4
- Years trading5 × 2
- Other BCA workheads5 × 2
- Public record completeness3 × 1
Record checked 16 October 2026 · source
Excell Enterprise Pte. Ltd.
6.9/10Based in Yishun in the North region, Excell Enterprise has 3 years on ACRA's books (incorporated 2023). Its CR09 registration is grade L5 and it also carries 1 other BCA workhead. When we checked its website it described renovation, fit-out work.
- Registered address
- 6 Yishun Industrial Street 1 #08-02 North View Bizhub, Singapore 768090
- UEN
- 202314617Z
- Incorporated
- 2023 (3 yrs)
- BCA CR09
- Grade L5, valid to 1 July 2027
- Other BCA workheads
- CW01 C3
- HDB DRC listed
- No / not on record
- Office phone
- Not available
- Website
- excellenterprise.com.sg
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade5 × 4
- Years trading2 × 2
- Other BCA workheads2 × 2
- Public record completeness3 × 1
Record checked 16 October 2026 · source
Witflux Engineering Pte. Ltd.
6.9/10On BCA's register it holds CR09 at grade L3 (valid to 1 May 2027). The company's been around since 2011 and is based in Yishun in the North region. Other workheads: CR06, CW01, CW02. When we checked its website it described renovation, fit-out work.
- Registered address
- 1 Yishun Industrial Street 1 #04-23 A'Posh Bizhub, Singapore 768160
- UEN
- 201133226K
- Incorporated
- 2011 (15 yrs)
- BCA CR09
- Grade L3, valid to 1 May 2027
- Other BCA workheads
- CW01 B2, CW02 C1, CR06 L2
- HDB DRC listed
- No / not on record
- Office phone
- +65 6262 3435
- Website
- witflux.com.sg
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade3 × 4
- Years trading4 × 2
- Other BCA workheads4 × 2
- Public record completeness3 × 1
Record checked 16 October 2026 · source
Ab Associates Pte. Ltd.
6.7/10On BCA's register it holds CR09 at grade L3 (valid to 1 July 2027). The company's been around since 2013 and is based in Woodlands in the North region. Other workheads: CR06, CW01. When we checked its website it described renovation, fit-out work.
- Registered address
- 31 Woodlands Close #03-05 Woodlands Horizon, Singapore 737855
- UEN
- 201331123W
- Incorporated
- 2013 (13 yrs)
- BCA CR09
- Grade L3, valid to 1 July 2027
- Other BCA workheads
- CW01 C3, CR06 L1
- HDB DRC listed
- No / not on record
- Office phone
- +65 6909 2427
- Website
- abassociates.com.sg
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade3 × 4
- Years trading4 × 2
- Other BCA workheads3 × 2
- Public record completeness4 × 1
Record checked 16 October 2026 · source
Diamond Glass Enterprise Pte. Ltd.
6.2/10Based in Bedok in the East region, Diamond Glass Enterprise has 20 years on ACRA's books (incorporated 2006). Its CR09 registration is grade L2 and it also carries 3 other BCA workheads. When we checked its website it described alteration, reinstatement work.
- Registered address
- 7 Kaki Bukit Road 1 #B1-14 Eunos Technolink, Singapore 415937
- UEN
- 200610366D
- Incorporated
- 2006 (20 yrs)
- BCA CR09
- Grade L2, valid to 1 November 2028
- Other BCA workheads
- CW01 C3, CR01 Single Grade, CR06 L1
- HDB DRC listed
- No / not on record
- Office phone
- +65 6221 0704
- Website
- diamondglass.com.sg
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade2 × 4
- Years trading4 × 2
- Other BCA workheads4 × 2
- Public record completeness4 × 1
Record checked 16 October 2026 · source
Mutiara (FE) Pte. Ltd.
6.0/10Based in Tuas in the West region, Mutiara (FE) has 22 years on ACRA's books (incorporated 2004). Its CR09 registration is grade L1 and it also carries 4 other BCA workheads.
- Registered address
- 17B Tuas Road, Singapore 637815
- UEN
- 200406336W
- Incorporated
- 2004 (22 yrs)
- BCA CR09
- Grade L1, valid to 1 January 2028
- Other BCA workheads
- CW01 C1, CW02 C3, CR06 L4, ME06 L1
- HDB DRC listed
- No / not on record
- Office phone
- +65 6462 3393
- Website
- mutiara.com.sg
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade1 × 4
- Years trading5 × 2
- Other BCA workheads5 × 2
- Public record completeness3 × 1
Record checked 16 October 2026 · source
Bestlink Construction Pte. Ltd.
5.8/10Bestlink Construction was incorporated in 1996, so about 30 years ago, and its registered office is in Sembawang in the North region. BCA lists it under CR09 at grade L1 (valid to 1 July 2027), and it also holds CR06, CW01, CW02. When we checked its website it described renovation, fit-out work.
- Registered address
- 15A Senoko Way, Singapore 758037
- UEN
- 199603379E
- Incorporated
- 1996 (30 yrs)
- BCA CR09
- Grade L1, valid to 1 July 2027
- Other BCA workheads
- CW01 B2, CW02 C3, CR06 L1
- HDB DRC listed
- No / not on record
- Office phone
- +65 6366 1112
- Website
- bestlink.com.sg
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade1 × 4
- Years trading5 × 2
- Other BCA workheads4 × 2
- Public record completeness4 × 1
Record checked 16 October 2026 · source
Envirotec Controls (Asia Pacific) Pte. Ltd.
5.8/10On BCA's register it holds CR09 at grade L1 (valid to 1 January 2027). The company's been around since 2009 and is based in Serangoon in the North-East region. Other workheads: CR01, ME01, ME05, ME06, ME09. When we checked its website it described air-conditioning, renovation, fit-out work.
- Registered address
- 50 Serangoon North Avenue 4 #07-14 First Centre, Singapore 555856
- UEN
- 200919625D
- Incorporated
- 2009 (17 yrs)
- BCA CR09
- Grade L1, valid to 1 January 2027
- Other BCA workheads
- CR01 Single Grade, ME01 L1, ME05 L1, ME06 L1, ME09 L1
- HDB DRC listed
- No / not on record
- Office phone
- +65 6570 0501
- Website
- envirotec-controls.com
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade1 × 4
- Years trading4 × 2
- Other BCA workheads5 × 2
- Public record completeness4 × 1
Record checked 16 October 2026 · source
Buildfolio Global Pte. Ltd.
5.3/10Based in Woodlands in the North region, Buildfolio Global has 10 years on ACRA's books (incorporated 2016). Its CR09 registration is grade L2 and it also carries 2 other BCA workheads.
- Registered address
- 31 Woodlands Close #04-12 Woodlands Horizon, Singapore 737855
- UEN
- 201606660G
- Incorporated
- 2016 (10 yrs)
- BCA CR09
- Grade L2, valid to 1 June 2028
- Other BCA workheads
- CW01 C2, CR06 L2
- HDB DRC listed
- Yes
- Office phone
- +65 6560 0019
- Website
- buildfolioglobal.com
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade2 × 4
- Years trading3 × 2
- Other BCA workheads3 × 2
- Public record completeness4 × 1
Record checked 16 October 2026 · source
Inn Interior Enterprise Pte Ltd
5.3/10On BCA's register it holds CR09 at grade L1 (valid to 1 June 2027). The company's been around since 1972 and is based in Clementi in the West region. Other workheads: CR06, CW01.
- Registered address
- 34 Toh Guan Road East #01-26 Enterprise Hub, Singapore 608579
- UEN
- 197200905E
- Incorporated
- 1972 (54 yrs)
- BCA CR09
- Grade L1, valid to 1 June 2027
- Other BCA workheads
- CW01 C1, CR06 L3
- HDB DRC listed
- Yes
- Office phone
- +65 6316 5471
- Website
- inninterior.com.sg
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade1 × 4
- Years trading5 × 2
- Other BCA workheads3 × 2
- Public record completeness4 × 1
Record checked 16 October 2026 · source
Fibrwrap Construction Pte. Ltd.
5.3/10Fibrwrap Construction was incorporated in 2002, so about 24 years ago, and its registered office is in Bukit Merah in the Central region. BCA lists it under CR09 at grade L1 (valid to 1 January 2027), and it also holds CW01, CW02. When we checked its website it described renovation, fit-out work.
- Registered address
- 1 Jalan Kilang Timor #04-06 Pacific Tech Centre, Singapore 159303
- UEN
- 200203354E
- Incorporated
- 2002 (24 yrs)
- BCA CR09
- Grade L1, valid to 1 January 2027
- Other BCA workheads
- CW01 C2, CW02 C3
- HDB DRC listed
- No / not on record
- Office phone
- +65 6898 5248
- Website
- fibrwrapsg.com
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade1 × 4
- Years trading5 × 2
- Other BCA workheads3 × 2
- Public record completeness4 × 1
Record checked 16 October 2026 · source
Lee Hong Lee Construction Pte. Ltd.
5.3/10Based in Sungei Kadut in the North region, Lee Hong Lee Construction has 24 years on ACRA's books (incorporated 2002). Its CR09 registration is grade L1 and it also carries 2 other BCA workheads. When we checked its website it described renovation, fit-out work.
- Registered address
- 6D Mandai Estate #09-12 M-Space, Singapore 729938
- UEN
- 200202635W
- Incorporated
- 2002 (24 yrs)
- BCA CR09
- Grade L1, valid to 1 May 2028
- Other BCA workheads
- CW01 C3, CR06 L1
- HDB DRC listed
- Yes
- Office phone
- +65 6292 3158
- Website
- leehonglee.com.sg
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade1 × 4
- Years trading5 × 2
- Other BCA workheads3 × 2
- Public record completeness4 × 1
Record checked 16 October 2026 · source
I Design & Build Pte. Ltd.
5.3/10On BCA's register it holds CR09 at grade L1 (valid to 1 June 2027). The company's been around since 2004 and is based in Tampines in the East region. Other workheads: CR06, CW01.
- Registered address
- 12 Changi South Street 1, Singapore 486786
- UEN
- 200404950M
- Incorporated
- 2004 (22 yrs)
- BCA CR09
- Grade L1, valid to 1 June 2027
- Other BCA workheads
- CW01 C3, CR06 L4
- HDB DRC listed
- Yes
- Office phone
- +65 6259 1567
- Website
- i-design.com.sg
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade1 × 4
- Years trading5 × 2
- Other BCA workheads3 × 2
- Public record completeness4 × 1
Record checked 16 October 2026 · source
Alliancz International Pte. Ltd.
5.3/10Alliancz International was incorporated in 2006, so about 20 years ago, and its registered office is in Geylang in the Central region. BCA lists it under CR09 at grade L1 (valid to 1 February 2027), and it also holds CR01, CR06, CW01. When we checked its website it described renovation, fit-out work.
- Registered address
- 40 Ubi Crescent #01-02 Ubi Techpark, Singapore 408567
- UEN
- 200616212Z
- Incorporated
- 2006 (20 yrs)
- BCA CR09
- Grade L1, valid to 1 February 2027
- Other BCA workheads
- CW01 C1, CR01 Single Grade, CR06 L1
- HDB DRC listed
- No / not on record
- Office phone
- +65 6743 3313
- Website
- allianczinternational.com
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade1 × 4
- Years trading4 × 2
- Other BCA workheads4 × 2
- Public record completeness4 × 1
Record checked 16 October 2026 · source
Skyler Construction Pte. Ltd.
5.3/10Based in Geylang in the Central region, Skyler Construction has 11 years on ACRA's books (incorporated 2015). Its CR09 registration is grade L1 and it also carries 3 other BCA workheads. When we checked its website it described electrical, renovation, fit-out work.
- Registered address
- 2 Kallang Pudding Road #09-13 Mactech Building, Singapore 349307
- UEN
- 201537231H
- Incorporated
- 2015 (11 yrs)
- BCA CR09
- Grade L1, valid to 1 December 2027
- Other BCA workheads
- CW01 C3, CR06 L1, ME05 L1
- HDB DRC listed
- Yes
- Office phone
- Not available
- Website
- skylerconstruction.com
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade1 × 4
- Years trading4 × 2
- Other BCA workheads4 × 2
- Public record completeness4 × 1
Record checked 16 October 2026 · source
Galaxy Studio Interior Pte. Ltd.
5.3/10Galaxy Studio Interior was incorporated in 2018, so about 8 years ago, and its registered office is in Woodlands in the North region. BCA lists it under CR09 at grade L1 (valid to 1 July 2028), and it also holds CR06, CW01, ME01, ME05.
- Registered address
- 69 Woodlands Industrial Park E2 Nordix, Singapore 757481
- UEN
- 201842359D
- Incorporated
- 2018 (8 yrs)
- BCA CR09
- Grade L1, valid to 1 July 2028
- Other BCA workheads
- CW01 C3, CR06 L4, ME01 L1, ME05 L1
- HDB DRC listed
- Yes
- Office phone
- +65 6970 5988
- Website
- galaxystudio.net
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade1 × 4
- Years trading3 × 2
- Other BCA workheads5 × 2
- Public record completeness4 × 1
Record checked 16 October 2026 · source
Wsh Experts Pte. Ltd.
5.3/10On BCA's register it holds CR09 at grade L1 (valid to 1 July 2027). The company's been around since 2018 and is based in Kallang in the Central region. Other workheads: CR01, CR06, CW01, CW02, ME01 and more. When we checked its website it described electrical, renovation, fit-out work.
- Registered address
- 80 Bendemeer Rd #07-05, Singapore 339949
- UEN
- 201805323R
- Incorporated
- 2018 (8 yrs)
- BCA CR09
- Grade L1, valid to 1 July 2027
- Other BCA workheads
- CW01 C3, CW02 C3, CR01 Single Grade, CR06 L1, ME01 L1, ME05 L1, ME06 L1
- HDB DRC listed
- No / not on record
- Office phone
- +65 6909 1434
- Website
- wshexperts.com.sg
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade1 × 4
- Years trading3 × 2
- Other BCA workheads5 × 2
- Public record completeness4 × 1
Record checked 16 October 2026 · source
Acolite Construction (S) Pte. Ltd.
5.1/10On BCA's register it holds CR09 at grade L1 (valid to 1 December 2026). The company's been around since 1984 and is based in Geylang in the Central region. Other workheads: CR06, CW01. When we checked its website it described renovation, fit-out work.
- Registered address
- 37 Lorong 23 Geylang #05-03 Yu Li Industrial Building, Singapore 388371
- UEN
- 198401013N
- Incorporated
- 1984 (42 yrs)
- BCA CR09
- Grade L1, valid to 1 December 2026
- Other BCA workheads
- CW01 C3, CR06 L1
- HDB DRC listed
- No / not on record
- Office phone
- +65 6747 2322
- Website
- acolite.com.sg
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade1 × 4
- Years trading5 × 2
- Other BCA workheads3 × 2
- Public record completeness3 × 1
Record checked 16 October 2026 · source
Dezign Format Pte Ltd
5.1/10Based in Sembawang in the North region, Dezign Format has 34 years on ACRA's books (incorporated 1992). Its CR09 registration is grade L1 and it also carries 2 other BCA workheads.
- Registered address
- 2 Woodlands Sector 1 #03-21 Woodlands Spectrum, Singapore 738068
- UEN
- 199203233Z
- Incorporated
- 1992 (34 yrs)
- BCA CR09
- Grade L1, valid to 1 July 2027
- Other BCA workheads
- CW01 C2, CR06 L3
- HDB DRC listed
- No / not on record
- Office phone
- +65 6756 2928
- Website
- dezignformat.com
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade1 × 4
- Years trading5 × 2
- Other BCA workheads3 × 2
- Public record completeness3 × 1
Record checked 16 October 2026 · source
Regius Construction & Civil Engineering Pte. Ltd.
5.1/10Regius Construction & Civil Engineering was incorporated in 2003, so about 23 years ago, and its registered office is in Serangoon in the North-East region. BCA lists it under CR09 at grade L1 (valid to 1 August 2027), and it also holds CR06, CW01. When we checked its website it described renovation, fit-out work.
- Registered address
- 5004 Ang Mo Kio Avenue 5 #04-02 Techplace Ii, Singapore 569872
- UEN
- 200311929W
- Incorporated
- 2003 (23 yrs)
- BCA CR09
- Grade L1, valid to 1 August 2027
- Other BCA workheads
- CW01 C3, CR06 L3
- HDB DRC listed
- No / not on record
- Office phone
- +65 6484 2209
- Website
- regiusconstruction.com.sg
- Google reviews
- Not checked yet, not scored
How it scored
- BCA CR09 grade1 × 4
- Years trading5 × 2
- Other BCA workheads3 × 2
- Public record completeness3 × 1
Record checked 16 October 2026 · source
Before you hire
Ask what system they'll use and whether they'll do a ponding test before tiling over it. Ask for the warranty terms in writing and what's excluded. If the leak is coming from a unit above you, sort out who's responsible with your neighbour or MCST first, it saves arguments later.
Questions people ask
What is CR09?
It's BCA's registration workhead for waterproofing installation. Grades go from L1 to L6 depending on the size of contracts the firm is cleared for.
Can my renovation contractor do the waterproofing?
Many can, and several firms here are also general renovation contractors. For roofs or a persistent leak a CR09 registered firm is a sensible choice.