Key Takeaways

  • A HDB renovation permit is required for works affecting structure, flooring, plumbing, gas, windows, or external facades in HDB flats.
  • Only HDB-licensed contractors listed in the Directory of Renovation Contractors can apply for a HDB renovation permit on behalf of homeowners.
  • The permit application involves online submission by the contractor, with owner acknowledgement and approval usually granted within three weeks.
  • Renovation work is only allowed from Monday to Saturday, 9:00am to 6:00pm, with noisy works restricted to weekdays before 5:00pm.
  • Homeowners can check their HDB renovation permit status via My HDBPage using Singpass under the Purchased Flat section.

Renovating a HDB flat is often the most exciting part of settling into a new home. Whether you are refreshing an ageing resale unit or fitting out a newly collected BTO flat, renovation is where your personal preferences finally take shape. At the same time, it is also where many homeowners first encounter regulatory requirements.

In Singapore, most renovation works are governed by the HDB renovation permit framework administered by the Housing & Development Board. These rules are in place to protect structural safety, shared services, and the wellbeing of neighbours in a high-density living environment.

This guide reflects the latest HDB process and walks you through when a HDB renovation permit is required, how the current application process works, what rules apply during renovation, and how to check your permit status online.

When Is a HDB Renovation Permit Required?

Not all home improvements require approval, but many common renovation works do. As a general rule, any renovation that affects the flat’s structure, flooring, plumbing, windows, gas system, or external facade will require a HDB renovation permit.

Renovation Works That Require Approval

Replacing floor finishes

Changing tiles, vinyl, or other floor finishes requires a permit. The new floor finish must not exceed 5cm in thickness, and there must be at least a 1-metre clearance from window openings to the finished floor level to prevent safety risks.

Hacking or altering walls

Structural or load-bearing walls cannot be hacked under any circumstances. Some non-structural walls may also be protected depending on layout and services routing. Approved hacking must start from the ceiling level, and replacement walls must not exceed 2.5cm in thickness.

Relocating doors

Moving door openings alters the approved layout of the flat and therefore requires a HDB renovation permit, especially if the changes affect kitchens, bedrooms, or structural zones.

Modifying staircases

For maisonettes or loft units, staircase modifications require approval from both HDB and the Building and Construction Authority (BCA). A professional engineer or qualified contractor must prepare compliant designs before submission.

Replacing windows

All window replacements must follow HDB specifications. For example, window leaves must not exceed 700mm in width, and sliding windows must fall within approved size ranges. Works must be carried out by a BCA-approved window contractor listed in HDB’s directory.

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    Bathroom and plumbing works

    Major bathroom works are restricted in the first three years of new BTO flats to protect waterproofing membranes. Plumbing changes such as relocating sinks or toilets require approval and must be performed by a licensed PUB plumber.

    Gas works

    Any work involving gas pipes, meters, or appliances, including installing gas ovens or relocating meters requires a permit and must be carried out by licensed gas service workers.

    Installing air-conditioners

    Air-conditioner installation must comply with electrical loading limits and be performed by BCA-trained installers. An installation report must be submitted to HDB within 14 days after completion.

    How to Apply for a HDB Renovation Permit

    HDB renovation permit document issued by the Housing and Development Board in Singapore

    The application process for a HDB renovation permit has been streamlined in recent years. Importantly, homeowners do not submit the application themselves. Instead, the entire process is handled online by the appointed HDB-licensed renovation contractor, with the flat owner providing formal acknowledgement.

    Step 1: Confirm whether your renovation needs a permit

    Before any work begins, review the scope of renovation with your contractor to confirm which items require approval. When in doubt, it is safer to assume a permit is required, as unauthorised works can lead to enforcement action later.

    Step 2: Engage a HDB-licensed renovation contractor

    Only contractors listed in HDB’s Directory of Renovation Contractors (DRC) can submit renovation permit applications. This requirement applies even if you are doing partial works or engaging specialists for specific trades.

    Step 3: Preparation of renovation drawings and scope

    Your contractor will prepare the necessary drawings and specifications, clearly indicating all regulated works such as hacking, flooring replacement, plumbing alterations, window works, or air-conditioner installation. Accuracy is critical, as on-site works must match the approved plans.

    Step 4: Homeowner acknowledgement and declarations

    As the flat owner, you will be required to acknowledge the renovation details and permit conditions. This is typically done through a formal owner acknowledgement form, confirming that you understand the renovation rules, permitted works, and responsibilities during renovation.

    Step 5: Online submission via HDB systems

    The contractor submits the HDB renovation permit application electronically through HDB’s online system. Supporting documents, drawings, and declarations are uploaded at this stage.

    Step 6: HDB review and approval

    HDB reviews the application and may request clarifications or revisions if needed. Approval typically takes up to three weeks, depending on the complexity of the works.

    Once approved, the renovation permit is valid for:

    • Three months for new BTO flats
    • One month for resale flats

    Renovation works must be completed within this validity period unless an extension is granted.

    Rules to Follow During Renovation Works

    Renovation rules are strictly enforced to minimise disruption and ensure safety.

    Renovation work is allowed from Monday to Saturday, 9:00am to 6:00pm. Noisy activities such as drilling or wall hacking must stop by 5:00pm on weekdays and are not allowed on Saturdays, Sundays, public holidays, or the eves of public holidays.

    Contractors must also protect common areas, manage debris properly, and avoid damage to shared services such as pipes and electrical risers.

    How to Check the Status of Your HDB Renovation Permit

    Once the application has been submitted, homeowners can track the status easily online.

    1. Log in to My HDB Page using Singpass
    2. Go to My Flat > Purchased Flat
    3. Select the Renovation section

    Here, you can view whether your HDB renovation permit is under review, approved, or pending additional information. Homeowners may also receive SMS or system notifications when the permit status changes.

    Frequently Asked Questions About HDB Renovation Permits

    How do I find a HDB-approved renovation contractor?

    HDB maintains a Directory of Renovation Contractors (DRC), as well as a separate list of BCA-approved window contractors, accessible through HDB e-services.

    Can I use CPF for renovation works?

    CPF savings cannot be used directly to pay for renovation expenses. Most homeowners rely on cash savings or renovation loans.

    What happens if I renovate without a permit?

    Unauthorised renovation works are a breach of HDB regulations. Homeowners may be required to reinstate the flat to its original condition at their own cost, which can be expensive and time-consuming.

    How do I resolve disputes with my contractor?

    If disputes cannot be resolved privately, homeowners may seek assistance from the Consumers Association of Singapore (CASE) or the Singapore Mediation Centre.

    Financing Your HDB Renovation

    Renovation costs can escalate quickly, especially for older resale flats that require extensive upgrading. In Singapore, renovation loans typically allow borrowing of up to six times your monthly income, capped at S$30,000, depending on the lender’s assessment.

    When considering financing, it is important to compare interest rates, repayment terms, and overall affordability before committing.

    A Smoother HDB Renovation Journey

    Understanding how the HDB renovation permit process works is essential for a smooth renovation experience. By knowing which works require approval, following the updated application process, and complying with renovation rules, you protect both your home and its long-term value.

    With the right planning and licensed professionals in place, you can focus on creating a home that suits your lifestyle without the stress of regulatory setbacks.

    If you’re looking to finance your renovation project and need a flexible loan option, Credit 21 is here to help. We offer tailored renovation loan solutions with straightforward application process and quick approval times. Apply for a loan now and make your dream home a reality with Credit 21.