HDB Renovation Permit Singapore 2026: Complete APEX Guide

Renovating an HDB flat in Singapore requires strict compliance with the Housing & Development Board's regulations to protect structural integrity, ensure safety, and maintain harmony among residents. This comprehensive guide explains the HDB renovation permit system, application procedures, fees, and legal requirements based on official government sources.

What Is an HDB Renovation Permit?

An HDB renovation permit is a mandatory approval from the Housing & Development Board required before commencing most renovation works in HDB flats. The permit system ensures that proposed renovations do not compromise the structural integrity of the building or violate safety regulations. As the flat owner, you are legally responsible for ensuring all necessary permits are obtained before renovation works begin, regardless of whether you engage a contractor.

The permit application must be submitted through HDB's APEX (Application for Renovation Permit via Electronic Transaction) system, typically by your renovation contractor on your behalf.

Official Source: HDB Renovation Guidelines (MyNiceHome.gov.sg)

Renovation Works That REQUIRE an HDB Permit

According to official HDB guidelines, the following renovation works mandate permit approval:

Floor Finishes

• Removing existing floor finishes and installing new materials (tiles, marble, vinyl, etc.)

• Raising floor levels in kitchens, balconies, bathrooms, or toilets

• Lightweight screed top-ups. Note that raising the floor with concrete beyond 50mm (inclusive of floor finishes) is not allowed at all (HDB)

Wall Works

• Demolishing internal walls (marked in RED on floor plans)

• Constructing new walls (marked in BLUE on floor plans)

• Creating arches or rounded corners to existing openings

• Replacing internal wall finishes that may affect wall structures

• Demolishing partition walls between kitchen and service balcony

Door Modifications

• Replacing main entrance doors situated along fire escape routes (facing staircases or lift lobbies) — must be half-hour fire-rated solid timber with door closer

• Changing door locations within the flat

Bathroom & Toilet Renovations

• Removing or replacing wall/floor tiles in bathrooms and toilets

• Extending bathroom or toilet areas

• Critical restriction: For BTO flats, tile hacking in bathrooms/toilets is prohibited within the first 3 years from the date of completion to protect waterproofing integrity

For new BTO homeowners, understanding the complete 3-year tile hacking rule and compliant alternatives is essential for proper renovation planning.

Window & Grille Works

• Installing or replacing windows

• Installing louvre, casement, or sliding windows on parapets

• Installing top-hung or sliding windows with louvers at living rooms/bedrooms along common corridors (minimum clearance height must exceed 2.1 meters from corridor finished floor level)

• Installing gates at entrance of recess areas

• Installing or modifying grilles at service yards or balconies

Air-Conditioner Installation

• Resale flats with 30 Amps main switches require permits before installing air-conditioner units using new 15 Amps power points or 20 Amps isolators

• Air-conditioner installations on building exteriors or projecting outward from the building require submission of installation reports

Official Source: HDB APEX Application Guide (PDF)

Renovation Works That Do NOT Require a Permit

Minor cosmetic works are exempted from permit requirements, including:

• Installing wallpaper

• Plastering walls

• Painting works

• Air-conditioner installation at designated ledges in BTO flats (compressor at AC ledge)

• Removing or repositioning internal fittings without structural impact

For comprehensive guidance on permitted and restricted works, refer to our detailed HDB renovation guidelines article.

HDB Renovation Permit Fees Explained

Critical disclosure: HDB has not officially published specific application fees for renovation permits on their public portal. HDB's permit page states only two fees: $5 for a floor plan if you lack one, and an administrative fee if unauthorised work is allowed to stay (HDB).

However, homeowners should note:

• Professional fees charged by renovation contractors for permit preparation and submission services vary by company

• Professional Engineer (PE) endorsement fees (when required for structural works) are separate professional service charges not controlled by HDB

• Town Council requirements may involve separate notification procedures

Because HDB publishes no permit fee schedule, ask your contractor to itemise any "permit fee" in the quotation.

For transparent pricing guidance on complete renovation costs, refer to our HDB renovation cost breakdown 2026.

HDB APEX System: Full Explanation & Workflow

APEX stands for Application for Renovation Permit via Electronic Transaction — HDB's mandatory online platform for submitting renovation permit applications.

Official APEX Portal: HDB e-Services

Who Can Apply Through APEX

While flat owners are ultimately responsible for permit compliance, HDB-registered renovation contractors listed in the Directory of Renovation Contractors (DRC) typically submit applications on behalf of homeowners. Contractors must hold valid Directory Reference Numbers in the format HB-XXXX-XXXX-XXXX.

Learn how to verify licensed HDB contractors and avoid renovation scams through proper credential checking.

APEX Application Workflow

The electronic submission process follows this sequence:

Step 1: Preparation

• Flat owner authorizes renovation contractor to apply on their behalf

• Contractor prepares scaled floor plans (A4 size) showing proposed works

• Demolition walls marked in RED, new walls in BLUE, walls demolished and rebuilt in same location in YELLOW

Step 2: Electronic Submission via APEX

1. Read Important Notes and Terms & Conditions

2. Accept terms to continue with submission

3. Enter flat owner's particulars (correct mobile number and email address required)

4. Read the Renovation Factsheet for unit-specific restrictions

5. Review important information on renovating HDB flats

6. Select locations and corresponding renovation works using standard codes

7. Attach relevant documents (scaled plans, endorsements)

8. Enter site supervisor's full name and contact number

9. Provide information on power tools to be used (brand name, model number)

10. Specify proposed renovation period and demolition schedule

11. Verify all information before final submission

Step 3: Notification & Approval

• HDB sends SMS notification upon receiving the application

• Approved renovation permits are viewable on My HDBPage

Required Documents for APEX Submission

• Acknowledgement form completed and signed by all flat owners

• Two (2) copies of scaled floor plans (A4 size) showing proposed renovations, endorsed by flat owner and renovation contractor

• Certified Worker details for demolition works

• Trained Window Installer particulars for window works (BCA-approved contractors only)

Official Source: HDB APEX Application Form (PDF)

For a complete step-by-step walkthrough with visual guides, see our HDB renovation permit application tutorial.

Professional Engineer (PE) Endorsement: When It Is Mandatory

HDB does name one PE requirement. A Professional Engineer (Civil/Structural) must supervise the demolition of non-load-bearing reinforced concrete (RC) elements, such as partition walls, party walls, stiffeners, lintols or hangers (HDB).

Lightweight partitions (hollow block, brick, drywall) need a permit but no PE under HDB's list. Structural RC walls, columns, beams and slabs may not be removed at all. HDB tells you if your works need a Qualified Person (HDB).

Homeowners planning major structural modifications should:

1. Consult directly with HDB during the APEX application process

2. Engage HDB-registered contractors who understand technical submission requirements

3. Request clarification from HDB's branch offices for complex structural works

Official Source: BCA Building Control Requirements

Typical PE Costs in Singapore

Disclosure: Professional Engineer endorsement fees are professional service charges determined by individual PE firms and are not regulated or published by HDB or BCA. Market rates vary based on:

• Scope and complexity of structural assessment required

• Type of renovation works proposed

• Building age and condition

• Documentation and calculation requirements

Homeowners should obtain quotes directly from qualified Professional Engineers registered with the Professional Engineers Board Singapore.

Timeline: How Long HDB Approval Takes

HDB does not officially publish standard processing times for APEX renovation permit applications on their public portal. Processing duration depends on:

• Completeness of submitted documentation

• Complexity of proposed works

• Whether additional technical reviews are required

Permit Validity Periods

Once approved, HDB renovation permits have strict expiry timelines:

The shorter deadline for resale flats minimizes disruption to existing neighbors. For detailed project timeline planning, consult our BTO renovation timeline guide.

HDB Renovation Permitted Hours & Timing Restrictions

To maintain neighborhood harmony, HDB enforces specific work hours:

Noisy renovation works must be completed within 3 consecutive days and are restricted to weekdays only.

Official Source: HDB Renovation Guidelines (MyNiceHome.gov.sg)

Common Mistakes That Delay Approval

Based on APEX application requirements, common errors include:

1. Incomplete documentation — missing scaled floor plans or acknowledgement forms

2. Unauthorized contractor submissions — contractors not registered in HDB's Directory of Renovation Contractors

3. Missing Certified Worker details for demolition works

4. Incorrect window contractor credentials — using non-BCA-approved contractors for window works

5. Unclear floor plan markings — improper color-coding of demolition (RED), addition (BLUE), and replacement (YELLOW) walls

6. Unauthorized amendments to application forms — any tampering results in automatic cancellation

7. Proposing works during restricted periods — tile hacking in BTO bathrooms within 3 years

Learn comprehensive compliance strategies in our HDB renovation tips and expert guide.

Legal Consequences of Renovating Without a Permit

Under the Housing and Development Act, unauthorized renovation works carry severe penalties:

Fines & Penalties

Reinstatement Orders

Beyond financial penalties, HDB may issue reinstatement orders compelling owners to restore flats to original condition at their own expense. Typical reinstatement costs range from S$10,000 to S$30,000, with mandatory compliance within 30–60 days. Failure to comply results in court action, and HDB reserves the right to forcibly enter, reinstate works, and bill the owner.

Impact on Property Resale

Illegal renovations must be rectified before resale transactions can proceed. A history of unauthorized works deters prospective buyers and may affect flat insurance eligibility.

Official Source: Singapore Statutes Online - Housing and Development Act

Step-by-Step: How to Apply for an HDB Renovation Permit

For Homeowners

1. Engage an HDB-registered contractor listed in the Directory of Renovation Contractors (verify DRC number)

2. Discuss proposed renovation works and confirm permit requirements

3. Authorize contractor in writing to submit APEX application on your behalf

4. Provide accurate contact details (mobile number and email address for SMS notifications)

5. Review and sign acknowledgement forms confirming understanding of HDB terms and conditions

6. Monitor application status via SMS notification and My HDBPage

7. Display Notice of Renovation outside your flat indicating start and end dates to inform neighbors

When selecting contractors, review our comprehensive top HDB renovation contractors Singapore guide for verified professionals.

For Renovation Contractors

1. Access APEX system through HDB InfoWEB

2. Enter flat owner particulars with verified contact information

3. Review unit-specific Renovation Factsheet for restrictions

4. Select renovation work codes corresponding to proposed works

5. Upload scaled floor plans with proper color-coding (RED for demolition, BLUE for new construction)

6. Attach required documents (acknowledgement forms, Certified Worker details, window installer credentials)

7. Specify site supervisor contact, power tools to be used, and renovation schedule

8. Submit application and inform flat owner of approval status

Contingency Application Method

A paper-based application form exists only for contingency use when APEX is unavailable electronically due to unforeseen circumstances. This manual process requires submission to HDB branch offices with all supporting documents.

Official HDB Contact: HDB Branch Offices Directory

FAQs (Optimized for Voice Search & Google PAA)

Do I need a permit for all HDB renovation works?
No, minor cosmetic works such as painting, wallpapering, and plastering do not require permits. However, any works involving floor finishes, wall demolition, door replacements, bathroom renovations, window installations, or structural modifications require HDB approval through APEX.

How much does an HDB renovation permit cost?
HDB's permit page does not list a permit fee; it states only $5 for a floor plan and an administrative fee if unauthorised work is allowed to stay (HDB). Contractors may charge for preparing and submitting the application.

Can I hack bathroom tiles in my new BTO flat?
No, tile hacking in bathrooms and toilets is prohibited for the first 3 years from the date of BTO completion to protect waterproofing integrity.

What are HDB renovation working hours in 2026?
General renovation works are allowed 9:00 AM to 6:00 PM on weekdays and Saturdays. Noisy works (hacking, drilling) are restricted to 9:00 AM to 5:00 PM on weekdays only. No renovation is allowed on Sundays and public holidays.

How long is an HDB renovation permit valid?
Approved works must be completed within 3 months of the permit date in newly completed blocks. In existing blocks, including resale flats, the limit is 1 month. Window-only works must be completed within 2 weeks (HDB).

What happens if I renovate without a permit?
You may face fines up to S$5,000, stop-work orders, mandatory reinstatement at your expense (S$10,000–S$30,000), and difficulties selling your flat. HDB may also compound the offence; unpaid composition sums lead to prosecution (HDB).

Who submits the APEX application?
Your HDB-registered renovation contractor typically submits the APEX application on your behalf, though you as the flat owner remain legally responsible for permit compliance.

Do I need Professional Engineer endorsement for HDB renovations?
Only for some works. HDB requires a PE (Civil/Structural) to supervise demolition of non-load-bearing RC elements such as RC partition walls (HDB). HDB will tell you during the application if a Qualified Person is needed.

Final Compliance Checklist for Homeowners

Before starting your HDB renovation, verify:

✅ Contractor is HDB-registered — confirm Directory Reference Number (HB-XXXX-XXXX-XXXX)
✅ APEX application submitted for all permit-required works
✅ 3-year tile hacking restriction observed for BTO bathrooms/toilets
✅ Approved renovation permit received and displayed
✅ Notice of Renovation posted outside flat with start/end dates
✅ Neighbors informed of renovation schedule
✅ Work hours compliant — 9 AM–6 PM weekdays/Saturdays; noisy works 9 AM–5 PM weekdays only
✅ Certified Workers engaged for demolition works
✅ BCA-approved window contractor hired for window installations
✅ Fire-rated doors specified for main entrance replacements along fire escape routes
✅ Completion deadline tracked — 3 months for newly completed blocks, 1 month for existing blocks (HDB)

How to Renovate Legally & Safely in Singapore

Compliance with HDB renovation regulations protects your investment, ensures structural safety, and maintains harmonious neighbor relations. The APEX system streamlines permit applications when proper documentation is prepared, and engaging HDB-registered contractors familiar with regulatory requirements minimizes approval delays.

For complex renovations involving structural modifications, consult HDB directly through their branch offices or customer service channels for project-specific guidance. Always prioritize obtaining proper approvals before commencing works to avoid costly reinstatement orders and legal penalties.

Many homeowners choose to work with experienced HDB-approved renovation specialists such as RCS Renovation Contractor Singapore to manage permits and compliance professionally, ensuring smooth project execution within HDB's regulatory framework. For transparent pricing on complete renovation packages, explore our 4-room BTO renovation packages and comprehensive renovation cost guide Singapore 2025.

Disclaimer: This guide is based on official HDB and government sources available as of February 2026. Renovation regulations may be updated periodically. Always verify current requirements directly with HDB through their official website (hdb.gov.sg) or customer service channels before commencing renovation works.

If a neighbour complains: see our guide to renovation noise complaints in Singapore for who to contact and what each side should do.