How to Choose a Renovation Contractor in Singapore

Choosing the right renovation contractor or interior designer is the single biggest factor in whether your project runs smoothly or becomes a horror story. Singapore has clear licensing and accreditation systems that make vetting easier than most homeowners realise. This guide walks through how to check a firm is legitimate, the accreditations that matter, the red flags to avoid, and the questions, quotes and contract terms to scrutinise before you commit.

Start with the HDB Directory of Renovation Contractors

If you live in an HDB flat, the first check is non-negotiable: the contractor must be listed in the HDB Directory of Renovation Contractors (DRC). Only firms registered under HDB’s Registered Renovation Contractors Scheme can legally apply for renovation permits and carry out works in HDB flats. You can search the directory on the HDB website by company name.

Using an unlisted contractor is a real risk. Renovating without the proper permit can lead to fines of up to $5,000, mandatory removal of unauthorised work at your expense, and stop-work orders that stall your project. The directory listing is your baseline proof that a firm is authorised to work on your flat.

Why licensing matters

Getting onto the DRC is not automatic. To be listed, a firm generally must have completed the “Renovation for Public Housing” course run with the BCA Academy, have at least three years of renovation experience (reduced to one year if the firm holds CaseTrust accreditation), and have been a registered, owned business for at least a year. In other words, a DRC listing signals that a firm has met a training and experience bar and has agreed to abide by HDB’s renovation rules — including which walls can be hacked and when noisy works are allowed.

CaseTrust and bizSAFE explained

Beyond the DRC, two accreditations come up repeatedly:

• CaseTrust (for renovation) — run by the Consumers Association of Singapore, this scheme focuses on consumer protection. Accredited firms use the CaseTrust Standard Renovation Contract, cap the initial deposit at a maximum of 20% of the contract value, provide a deposit performance bond that safeguards your deposit against the firm’s closure or liquidation, offer a workmanship warranty, and agree to mediation through CASE if disputes arise.
• bizSAFE — a national workplace safety and health programme with five tiers up to bizSAFE Star. It signals that a firm takes worksite safety seriously, which matters on an active renovation site.

A firm carrying a DRC listing plus CaseTrust and bizSAFE — as FC Interior Design does (HDB-Approved Contractor HB-09-2619C, bizSAFE Star, in business since 1990) — has cleared multiple independent checks on legitimacy, consumer protection and safety.

Red flags to watch for

• Pressure to pay a large deposit — anything approaching or above half the contract value upfront is a warning sign.
• Cash-only or personal-account payments — legitimate firms invoice to the company.
• No written, itemised quote — vague lump sums make disputes almost inevitable.
• Quotes far below everyone else — usually a sign of excluded scope, cheap materials or variation orders to come.
• No physical office or portfolio — you want a firm you can find again later.
• Reluctance to put promises in writing — if it is not in the contract, it does not exist.

Questions to ask before you sign

• Are you listed in the HDB DRC, and can I have your licence number?
• Who is my main point of contact, and who supervises the site?
• Will you handle the HDB permit application?
• What exactly is included — and excluded — in this quote?
• What is the payment schedule tied to?
• What warranty do you provide, and what does it cover?
• Can I speak to recent clients or see completed projects?

How to read a renovation quote

A good quote is itemised, not a single lump sum. Each trade — carpentry, masonry, plumbing, electrical, painting — should be listed with quantities, materials and finishes specified. This lets you compare firms like for like and see where your money goes. When two quotes differ sharply, the reason is almost always in the details: the length of carpentry included, the grade of laminate, whether hacking and haulage are inside the price, and whether appliances and fittings are excluded. Beware the low headline number that balloons through variation orders once work begins.

Contracts, deposits and payment schedules

Insist on a written contract before any money changes hands. It should specify the full scope, materials, timeline, payment milestones, warranty and how variations are priced. Keep the deposit modest — CaseTrust caps it at 20% of the contract value, a sensible benchmark even with non-accredited firms. Payments should be staged against progress, for example on commencement, on carpentry installation and on completion, never fully upfront. Hold back a final payment until you have inspected the work and any defects are rectified.

Timeline expectations

Most HDB renovations run around 6 to 10 weeks, depending on scope and how much hacking and carpentry is involved; resale flats needing an extensive overhaul take longer. Remember HDB’s work-hour limits: general renovation is allowed 9am–6pm on weekdays and Saturdays, while noisy works such as hacking and drilling are restricted to 9am–5pm on weekdays only, with none on Sundays or public holidays. Build in a buffer — permit processing, material lead times and the defects-rectification stage all add days. A contractor who quotes a suspiciously fast timeline may be cutting corners.

Frequently asked questions

How do I check if a renovation contractor is licensed in Singapore?

Search the HDB Directory of Renovation Contractors on the HDB website by company name. Only listed firms can legally apply for permits and renovate HDB flats. Ask for the firm’s HDB licence number and verify it there.

What does CaseTrust accreditation give me?

CaseTrust-accredited renovators use a standard contract, cap your initial deposit at 20% of the contract value, issue a deposit performance bond that protects your deposit if the firm closes, and agree to mediation through CASE if a dispute arises.

How much deposit should I pay a renovation contractor?

Keep it modest and staged. CaseTrust caps the initial deposit at 20% of the contract value, which is a good benchmark. Avoid firms demanding large upfront sums or cash to a personal account, and tie later payments to progress.

How long does an HDB renovation take?

Typically around 6 to 10 weeks depending on scope, with heavy resale overhauls taking longer. Factor in permit processing, material lead times and HDB’s restricted noisy-work hours when planning your move-in date.