# Renovation Contractors in Serangoon

HDB flat owners must use contractors listed in HDB's Directory of Renovation Contractors (DRC), and works like hacking walls or replacing floors need an HDB permit. Qanvast's 2025 data puts a typical 4-room renovation at about $51,000–$62,000 for a BTO and $64,000–$80,000 for a resale flat.

## Key facts
- Listings: 17
- Matched to a government licence/register: 11
- Median years in business: 19

## Prices in Singapore
Expected 2025 HDB renovation costs from Qanvast, based on 259 BTO and 302 resale projects. Resale flats cost more because of hacking, rewiring and replumbing. Hidden works can push costs up significantly.

| Service | Typical price | Notes |
|---|---|---|
| 3-room BTO | S$36,100–S$43,700 per flat | Fewer than 30 data points; indicative |
| 4-room BTO | S$51,000–S$61,800 per flat |  |
| 5-room BTO | S$67,000–S$82,400 per flat |  |
| 3-room resale | S$51,000–S$61,800 per flat | Full reconfiguration can cost much more |
| 4-room resale | S$64,300–S$80,300 per flat |  |
| 5-room resale | S$84,300–S$97,000 per flat |  |
| Hacking and disposal of floor tiles | S$3–S$8 per sq ft | Requires an HDB permit; screeding extra |

## Licences
- **Directory of Renovation Contractors (DRC)** (Housing & Development Board (HDB), required): Under the Housing & Development (Renovation Control) Rules, HDB flat owners must only engage contractors listed in the DRC for renovation works. DRC contractors apply for HDB permits on your behalf and can be given demerit points or debarred for breaches. Check: https://www.hdb.gov.sg/managing-my-home/renovation-and-maintenance/renovation/important-information-on-renovations
- **CaseTrust accreditation for renovation businesses** (Consumers Association of Singapore (CASE), optional): Voluntary. Accredited firms cap the initial deposit at 20% of contract value, buy a deposit performance bond, use the CaseTrust Standard Renovation Contract and give at least a 12-month workmanship warranty. A joint CaseTrust–RCMA scheme exists for RCMA members. Check: https://casetrust.case.org.sg/Home/casetrustlist
- **BCA Approved Window Contractor** (Building and Construction Authority (BCA), required): Window installation or replacement must be done by a BCA-approved window contractor (registered under workhead RW01) using trained window installers. For HDB flats the firm must also be listed with HDB. Check: https://www1.bca.gov.sg/public/private-property-ownership/approved-window-contractors

## How to choose
- Verify the contractor is in HDB's Directory of Renovation Contractors before signing, and confirm they will apply for any permit needed (hacking, flooring, windows, piping changes).
- Get at least three itemised quotations based on the same scope and drawings, with quantities (sq ft, foot run) and brands, so you can compare like for like.
- Prefer a CaseTrust-accredited firm if you want deposit protection: the initial deposit is capped at 20% and protected by a performance bond.
- Tie progress payments to completed milestones, not dates, and hold back a final payment until defects are rectified.
- Ask to see a completed project of similar age and flat type, especially for resale flats where rewiring and replumbing are common.

## Red flags
- Asking for more than 20–30% upfront, or full payment for carpentry before it is installed.
- Offering to hack walls or change floors without an HDB permit to save time.
- Lump-sum quotes without quantities, brands or specifications.
- Contractors who are not in the DRC but offer to 'use a friend's licence'.
- Pressure to sign on the spot with a limited-time discount.

## Listings (top 17)
- [Chye Thiam Maintenance](https://lookup.sg/biz/chye-thiam-maintenance), Serangoon · 32 Jln Kelulut · 12 min walk from Fernvale LRT · BCA registered · registered 1988
- [Regius Construction & Civil Engineering](https://lookup.sg/biz/regius-construction-and-civil-engineering), Serangoon · 5004 Ang Mo Kio Ave 5 · 24 min walk from Fernvale LRT · BCA registered · registered 2003
- [Asialand Construction Pte Ltd](https://lookup.sg/biz/asialand-construction-pte-ltd), Serangoon · 7030 Ang Mo Kio Ave 5, #07-15 Northstar @ AMK · 21 min walk from Tongkang LRT · BCA registered · registered 2008
- [Astec Technology Pte Ltd](https://lookup.sg/biz/astec-technology-pte-ltd), Serangoon · 7030 Ang Mo Kio Ave 5, #04 - 34 Northstar @ AMK · 21 min walk from Tongkang LRT · BCA registered · registered 2012
- [Space Systems Pte Ltd](https://lookup.sg/biz/space-systems-pte-ltd), Serangoon · 5029 Ang Mo Kio Ind Park 2, #01-151 · 17 min walk from Ang Mo Kio MRT · registered 1993
- [One Stop Builders](https://lookup.sg/biz/one-stop-builders), Serangoon · 7030 Ang Mo Kio Ave 5, #05-30 · 21 min walk from Tongkang LRT · registered 2019
- [Kang Sheng Engineering](https://lookup.sg/biz/kang-sheng-engineering), Serangoon · 55 Serangoon North Ave 4, #04-11 S9 @ Serangoon North · 23 min walk from Tongkang LRT · BCA registered · registered 2014
- [Home Fibre Industrial](https://lookup.sg/biz/home-fibre-industrial), Serangoon · 5048 Ang Mo Kio Ind Park 2, #01-613 · 17 min walk from Ang Mo Kio MRT · BCA registered · registered 2001
- [Singa Plasterceil Pte Ltd](https://lookup.sg/biz/singa-plasterceil-pte-ltd), Serangoon · Ang Mo Kio Industrial Park 2A, #01-17 Blk 5 · BCA registered · registered 2003
- [Metalex Engineering Pte Ltd](https://lookup.sg/biz/metalex-engineering-pte-ltd), Serangoon · 5041 Ang Mo Kio Ind Park 2 · 16 min walk from Ang Mo Kio MRT · BCA registered · registered 1994
- [Improtech Pte Ltd](https://lookup.sg/biz/improtech-pte-ltd), Serangoon · 1 Ang Mo Kio Industrial Park 2A · 23 min walk from Fernvale LRT · BCA registered · registered 1997
- [Aik Sing Construction & Engineering](https://lookup.sg/biz/aik-sing-construction-and-engineering), Serangoon · 3 Ang Mo Kio Industrial Park 2A, #02-11 AMK Tech 1 · 22 min walk from Fernvale LRT · BCA registered · registered 2015
- [Alexis Construction Pte Ltd](https://lookup.sg/biz/alexis-construction-pte-ltd), Serangoon · Northstar @ AMK, 7030 Ang Mo Kio Ave 5 · 22 min walk from Tongkang LRT · BCA registered · registered 2017
- [Khoon Engineering Contractor](https://lookup.sg/biz/khoon-engineering-contractor), Serangoon · 5000 Ang Mo Kio Ave 5, #04-01 · 23 min walk from Ang Mo Kio MRT · registered 1988
- [Kingsteel Engineering Construction](https://lookup.sg/biz/kingsteel-engineering-construction), Serangoon · 20 Ang Mo Kio Industrial Park 2A, #07-09 · registered 2007
- [MEAGA Pte. Ltd.](https://lookup.sg/biz/meaga-pte-ltd), Serangoon · 7030 Ang Mo Kio Ave 5, #08-19 Northstar @ AMK · 22 min walk from Tongkang LRT · registered 2022
- [Mecba Technology](https://lookup.sg/biz/mecba-technology), Serangoon · Northstar, AMK, 7030 Ang Mo Kio Avenue 5

## FAQs
### How much does it cost to renovate an HDB flat in 2025–2026?
Qanvast's 2025 figures put a 3-room BTO at about $36,100–$43,700, a 4-room BTO at $51,000–$61,800 and a 5-room BTO at $67,000–$82,400. Resale flats cost more: about $64,300–$80,300 for a 4-room and $84,300–$97,000 for a 5-room, because of hacking, rewiring and replumbing. Budget a contingency for hidden works.

### Do I need a permit to renovate my HDB flat?
Some works need HDB approval and others do not. Hacking or removing walls, replacing or raising floor finishes, window replacement and changes to sanitary piping all need approval, which your DRC contractor applies for. Simple works such as painting, carpentry and installing lights or fans generally do not. Check HDB's renovation guidelines for your specific works.

### What is HDB's Directory of Renovation Contractors?
It is HDB's list of contractors allowed to carry out renovation works in HDB flats. Under the Housing & Development (Renovation Control) Rules, flat owners must only engage DRC-listed contractors. HDB can fine errant contractors, give demerit points and debar those who exceed the threshold, and unauthorised works must be reinstated at the owner's and contractor's cost.

### Can I change my BTO toilet tiles immediately?
Owners of new BTO flats are generally required to wait three years before removing wall or floor finishes in toilets, to avoid damaging the original waterproofing. Tiling over existing tiles is an alternative some owners use. Any toilet works that affect floor finishes or piping still require a permit, so confirm the current rule with HDB or your DRC contractor.

### What protection do I get from a CaseTrust renovation firm?
CaseTrust-accredited renovation businesses cap your initial deposit at 20% of the total cost and protect it with a deposit performance bond if the firm closes or is wound up. They must use the CaseTrust Standard Renovation Contract, collect payments by milestones, give at least a 12-month workmanship warranty and go through CASE mediation for disputes.

## Sources
- HDB: Important information on renovations (Renovation Control Rules): https://www.hdb.gov.sg/managing-my-home/renovation-and-maintenance/renovation/important-information-on-renovations
- HDB: Renovation guidelines: https://www.hdb.gov.sg/managing-my-home/renovation-and-maintenance/renovation/renovation-guidelines
- MND written answer on renovation approvals in older HDB flats (2025): https://www.mnd.gov.sg/newsroom/speeches/view/written-answer-by-ministry-of-national-development-on-criteria-or-requirements-for-approval-of-renovation-works-in-older-hdb-flats
- CASE: CaseTrust accreditation for renovation businesses: https://case.org.sg/casetrust/casetrust-accreditation-for-renovation-businesses/
- CASE: List of CaseTrust-accredited businesses: https://casetrust.case.org.sg/Home/casetrustlist
- Qanvast: How much is a 3, 4 and 5-room HDB renovation in 2025? (15 Jan 2025): https://qanvast.com/sg/articles/-3384
- BCA: Window safety (approved window contractors): https://www1.bca.gov.sg/regulatory-info/building-control/window-safety

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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.