HDB Renovation Contractors:
Licensing Requirements
and Resident Obligations

The HDB Registered Renovation Contractor Scheme

HDB maintains a Registered Renovation Contractors (RRC) directory, which lists firms approved to carry out renovation works in HDB flats. Registration is not automatic — contractors must meet specific criteria including relevant trade licences, proper insurance coverage, and a satisfactory track record. The directory is publicly accessible through HDB's official website, and flat owners are expected to use it to verify any contractor before signing a contract.

Registration is organised into categories corresponding to the types of work a contractor is authorised to perform. A contractor registered only for general renovation works cannot carry out electrical rewiring, gas works, or structural modifications unless they also hold the relevant specialist sub-registrations or engage licensed sub-contractors for those specific trades.

Registration Categories and Scope

General Renovation

This base category covers the broadest range of common renovation activities: carpentry, tiling, plastering, painting, and basic partitioning. Most renovation firms holding an active general renovation registration can submit permit applications and manage standard residential renovation projects.

Specialist Sub-Categories

• Electrical works: Contractors must hold an Energy Market Authority (EMA) electrical worker licence or engage a licensed electrician. The EMA regulates all electrical installation works in Singapore regardless of property type.
• Gas works: Any modification to gas piping or connections requires a SP Group-accredited gas works contractor. This is a separate accreditation from HDB registration.
• Waterproofing: Wet area waterproofing is a controlled work category. Contractors carrying out waterproofing must meet HDB's technical standards and are typically required to provide a warranty on their waterproofing works.
• Structural works: Any work touching RC elements requires involvement of a Professional Engineer (PE) registered with the Professional Engineers Board (PEB). The PE endorses the structural calculations and bears professional liability for the assessment.

What Contractors Are Required to Do

Beyond holding the correct registration, HDB-registered renovation contractors are bound by a Code of Conduct that governs their behaviour throughout the renovation process. Key obligations include:

• Submitting the Renovation Permit application on behalf of the flat owner before works begin
• Ensuring that the Renovation Permit is displayed at the flat's entrance throughout the renovation period
• Restricting works to permitted hours: 9:00 am to 6:00 pm on weekdays, 9:00 am to 1:00 pm on Saturdays, and no works on Sundays or public holidays
• Keeping the common corridor and stairwell clear of debris, tools, and materials at all times
• Using lift lobbies only for transporting materials — not for storing them between working days
• Informing neighbouring flat owners in writing at least three days before hacking or noisy works begin
• Not exceeding the approved renovation timeline without filing for an extension

Flat Owner Obligations

HDB's renovation framework explicitly places responsibility for compliance on the flat owner, not just the contractor. This is a crucial point that many owners overlook when engaging a contractor. Even if the contractor carries out non-compliant works without the owner's knowledge, HDB may still hold the owner accountable because the owner has the legal duty to ensure that only registered contractors are used and that the renovation is conducted within approved parameters.

Before Renovation Begins

• Verify the contractor's HDB registration status in the official directory
• Confirm that the contractor has submitted a Renovation Permit application and received an approval before allowing works to start
• Obtain a written renovation plan and contract that specifies all works to be done — including which are classified as controlled works
• Notify HDB if the flat is currently tenanted, as additional restrictions apply in certain cases

During the Renovation

• Check that the Renovation Permit is displayed at the entrance
• Monitor that works do not extend beyond permitted hours
• Respond promptly if HDB sends an inspector — obstruction of an inspection is a separate regulatory violation
• File an extension application through the contractor if the renovation cannot be completed within the approved timeframe

After Renovation Completes

• Retain the Renovation Permit and contractor's documentation for at least five years
• Report any defects discovered after renovation — particularly waterproofing failures in wet areas — within the warranty period the contractor is obligated to provide
• If structural works were carried out, retain the PE's endorsement documents as these may be required in future sale or transfer transactions

When Disputes Arise Between Owners and Contractors

Renovation disputes in Singapore can be escalated through several channels depending on the nature of the complaint. For complaints about non-compliance with HDB renovation rules specifically, flat owners can file a complaint with HDB directly. For commercial disputes — defective works, contractor abandonment, payment disagreements — the appropriate channel is the Consumers Association of Singapore (CASE) or the Small Claims Tribunal for amounts below $30,000.

HDB may suspend or de-register a contractor found to have repeatedly violated renovation rules. De-registration means the contractor can no longer submit permit applications or carry out renovation works in HDB flats. Checking whether a contractor has any outstanding HDB de-registration notices or suspension history is possible through HDB's directory, which includes registration status flags.

Using Interior Design Firms vs. Registered Contractors

Interior design firms and renovation contractors operate differently under Singapore's regulatory framework. An interior design firm may plan and manage a renovation project, but the actual works on-site must still be executed by a registered HDB renovation contractor. If an interior design firm is engaged as the principal contractor, it must itself be registered with HDB — design-only firms without renovation registration cannot supervise or be responsible for on-site works.

This distinction becomes important when reviewing contracts. If an interior design firm's contract does not explicitly state its HDB registration number and position as the registered contractor of record, there is a risk that the firm will sub-contract the works to a registered contractor while remaining outside the regulatory framework. In such arrangements, clarifying the liability chain before works begin is essential.

Reference Links

• HDB Registered Contractor Directory
• EMA Electrical Licensing — Energy Market Authority
• CASE — Consumers Association of Singapore
• Professional Engineers Board Singapore