Renovating your HDB flat is an exciting milestone — a chance to personalise your space and create a home that truly reflects your lifestyle. But before diving into demolition or installations, it’s crucial to understand the rules set by the Housing & Development Board (HDB).
These HDB renovation guidelines ensure safety, protect the structural integrity of buildings, and maintain a harmonious environment for all residents. Knowing what is allowed and what is not helps you avoid unnecessary delays, failed inspections, and costly penalties.
If you are planning interior design in Singapore, here is a complete guide to the essential do’s and don’ts of HDB interior design and renovation works.
1. Permits & Approvals: What Requires HDB’s Green Light
Certain renovation works in HDB flats must have a renovation permit before they can start. These approvals ensure compliance with important safety requirements.
Structural Modifications
Any hacking of walls, especially load-bearing walls, requires prior approval. These walls support the building structure and are usually marked on your HDB floor plan.
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Structural walls CANNOT be removed
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Any modifications must be done by an HDB-licensed renovation contractor
Unauthorised hacking can compromise safety and lead to hefty fines, or even reinstatement orders.
Flooring Works
Replacing tiles, vinyl flooring, or raising floor levels may affect the building load.
HDB requires a permit for:
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Replacing existing floor finishes
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Raising the floor more than 50mm
This ensures structural and waterproofing standards are maintained.
Bathroom Renovations
For BTO flats, you cannot replace bathroom finishes during the first 3 years. This protects the waterproofing membrane from damage.
After this period:
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Tile replacement and plumbing changes are allowed with HDB approval
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Waterproofing tests may be required
Following these procedures prevents water leakage disputes with neighbours.
2. Works That Are Strictly Prohibited
Some renovation works are completely not allowed, no exceptions. These actions can endanger the entire building.
Altering Structural Elements
You cannot hack or modify:
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Beams
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Columns
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Slabs
These are essential to the block’s overall stability.
Unauthorised Facade Modifications
HDB maintains a clean and uniform look for every block.
Not allowed:
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Outdoor fixtures such as awnings
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Altering external walls or exterior tiles
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Displaying objects along common corridors
Any external changes require special approval.
Window Safety Violations
Windows must comply with approved materials, size, and design.
Prohibited modifications:
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Removing or installing full-height windows
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Installing casement windows facing common corridors
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Using non-certified window installers
These can pose safety hazards.
3. Renovation Timings
To minimise disruption to the community, HDB enforces strict working hours.
Additionally:
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You must notify neighbours at least 3 days in advance
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Your renovation permit must be displayed at your main entrance throughout the works
This fosters consideration and prevents complaints.
4. Electrical and Plumbing Works
Safety first, improper installations can lead to fire hazards and water leaks.
Electrical Works
Must be performed by a licensed electrician registered with EMA.
Examples requiring compliance:
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Adding power points
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Rewiring or rerouting cables
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Installing lighting fixtures
Plumbing Works
Must be done by a PUB-licensed plumber, especially for:
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Replacing water pipes
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Installing new sanitary fittings
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Reconfiguring water supply lines
If required, PUB inspections will ensure proper installation and compliance.
5. Door Modifications
Not all doors can be freely changed during your renovation.
Main Door & Digital Lock Requirements
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Must be fire-rated
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Must be approved by SCDF
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Cannot weaken doorway integrity
This is especially important for flats near fire escape routes.
Bomb Shelter Door Rules
You can cover or conceal it with carpentry or paint, but:
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The door cannot be removed or tampered with
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Access must remain unobstructed at all times
It serves critical life-saving purposes during emergencies.
Renovate with Confidence
Successful HDB renovation goes beyond beautiful interior design — it must also be safe, compliant, and respectful of shared living environments. By understanding what you can and can’t do, you’ll enjoy a smoother renovation process from start to finish.
Whether you are renovating a new BTO or upgrading your resale flat, working with an experienced HDB interior design Singapore firm ensures:
✅ Proper permits and approvals
✅ Adherence to HDB regulations
✅ Quality workmanship and project management
At Starry Homestead, we help homeowners navigate approvals, planning, and stylish transformation from start to finish. Our expert team specialises in HDB interior design Singapore, ensuring your home is both beautiful and 100% compliant with HDB standards. Ready to start your renovation journey? Schedule a free consultation with our interior designers today.
For new BTO homeowners, you may explore other helpful tips here.
