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Renovation Contractors in Singapore: 395 renovation contractors · 3-room BTO typically S$36,100–S$43,700 per flat

Updated October 2026How we rank
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.

12 of the best-documented renovation contractors in Singapore

Businesses with the most complete public records first, photos, licence matches, hours and track record. Never ordered by payment.

Woh Hup (Private) Limited

Woh Hup (Private) Limited

Bukit Timah

86+ years in business

7 min walk from Beauty World MRT

Unimax Creative

Unimax Creative

Novena

24+ years in business

12 min walk from Novena MRT

K.W. Const & Engrg Pte Ltd

K.W. Const & Engrg Pte Ltd

Clementi

23+ years in business

16 min walk from Jurong East MRT

Prelim Construction Pte Ltd

Prelim Construction Pte Ltd

Ang Mo Kio

29+ years in business

9 min walk from Lentor MRT

Shaft Build Construction Pte Ltd

Shaft Build Construction Pte Ltd

Clementi

39+ years in business

16 min walk from Bukit Batok MRT

Hydro-Seal Engineering

Hydro-Seal Engineering

Hougang

30+ years in business

14 min walk from Kovan MRT

Innovez Engineering Pte Ltd

Innovez Engineering Pte Ltd

Clementi

20+ years in business

16 min walk from Jurong East MRT

Jurong Engineering Limited

Jurong Engineering Limited

Boon Lay

21+ years in business

25 Tanjong Kling Rd

Sunray Woodcraft Construction

Sunray Woodcraft Construction

Sungei Kadut

39+ years in business

24 min walk from Kranji MRT

TCB Sports Pte Ltd

TCB Sports Pte Ltd

Jurong West

50+ years in business

15 min walk from Pioneer MRT

Huasing Construction & Trading

Huasing Construction & Trading

Sungei Kadut

35+ years in business

20 min walk from Yew Tee MRT

Wee Chwee Huat Scaffolding and Construction

Wee Chwee Huat Scaffolding and Construction

Woodlands

35+ years in business

14 min walk from Admiralty MRT

Ordered by verifiable signals, licence matches, track record and completeness of public records. Featured placements are labelled and never change this order.

Show all 395

Compare 8 renovation contractors side by side

Location, MRT walk, years in business, licence and published hours, facts from public records.

How much do renovation contractors charge 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.

  • 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

Sources: Qanvast: How much is a 3, 4 and 5-room HDB renovation in 2025? (15 Jan 2025); SmartCalculator.sg: Flooring cost Singapore (2026). Prices in SGD, before GST unless stated.

What licence should a renovation contractor have?

  • Directory of Renovation Contractors (DRC)

    Housing & Development Board (HDB) · Required by law

    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 the official register

  • CaseTrust accreditation for renovation businesses

    Consumers Association of Singapore (CASE) · Optional accreditation

    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 the official register

  • BCA Approved Window Contractor

    Building and Construction Authority (BCA) · Required by law

    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 the official register

How to choose a renovation contractor

  • 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.

Questions to ask before you book

  • Are you listed in HDB's Directory of Renovation Contractors, and are you CaseTrust-accredited?
  • Which items in my scope need an HDB permit, and who applies for it?
  • What is the payment schedule, and what does each payment correspond to?
  • How long is the workmanship warranty, and does it cover waterproofing?
  • Who is the site supervisor and how often will they be on site?
  • How are variation orders priced and approved?

Questions about renovation contractors in Singapore

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.

How many renovation contractors are there in Singapore?

Lookup lists 395 renovation contractors in Singapore as of October 2026, with the largest concentration in Geylang (39). Listings are compiled from government registers and open map data and refreshed regularly.