Understanding HDB Permit Requirements
The HDB renovation permit system is a critical risk management mechanism designed to protect the structural integrity of Singapore's public housing. Understanding which renovations require permits is your first step to ensuring a compliant and smooth renovation process.
The level of regulatory scrutiny applied to any renovation is directly proportional to the potential risk that work poses to the building's structure, waterproofing, and fire safety measures. This risk-based approach ensures that high-risk activities undergo rigorous review while allowing flexibility for minor cosmetic changes.
Complete Permit Requirement Schedule
| Renovation Type | Permit Required | Key Requirements | Processing Time |
|---|---|---|---|
| Demolition/Hacking of Walls | Yes - Always | Structural assessment required | 2-3 weeks |
| Relocation of Doors | Yes - Always | Involves wall hacking | 2-3 weeks |
| Floor Hacking & Replacement | Yes - If Hacking | 50mm max thickness | 1-2 weeks |
| Floor Overlay (Vinyl/Laminate) | No | Direct overlay only | N/A |
| Bathroom/Toilet (BTO <3 years) | Prohibited | 3-year waterproofing rule | Not Allowed |
| Bathroom/Toilet (After 3 years) | Yes - Always | PUB Licensed Plumber required | 2-3 weeks |
| Window Replacement | Yes - Always | BCA-approved contractor | 2-3 weeks |
| Main Door (Fire Escape Route) | Yes - Always | Half-hour fire-rated door | 2-3 weeks |
| Electrical Works (>30A) | Yes - If Upgrading | Licensed Electrical Worker | 1-2 weeks |
| Air-Con Installation (External) | Report Required | Installation report to HDB | 1 week |
| Painting Walls | No | HDB-registered contractor | N/A |
| Built-in Furniture | No | No structural changes | N/A |
Note: All works must be carried out by HDB-registered contractors, even if no permit is required
Prohibited Works - Never Allowed
Certain renovation works are strictly prohibited to ensure the absolute safety and structural soundness of HDB buildings. These are non-negotiable restrictions, and any attempt to carry them out constitutes a serious offence.
- Hacking of structural members (RC walls, columns, beams, floor slabs)
- Excessive floor loading (>150 kg/sqm)
- Plastering or skim coating of ceilings
- Replacement with full-height or three-quarter height windows
- Unauthorized balcony enclosure without PE approval
Severe Penalties for Prohibited Works
Attempting prohibited works can result in immediate stop-work orders, fines up to S$5,000, mandatory reinstatement at your cost, and potential criminal prosecution. Never proceed with prohibited works under any circumstances.
BTO-Specific Restrictions
New BTO flat owners face additional restrictions designed to protect the integrity of newly constructed units and honor warranty periods.
3-Year Waterproofing Moratorium
For new BTO flats, there is a strict three-year restriction from the block's completion date during which hacking of original bathroom/toilet floor and wall tiles is prohibited. This protects the HDB-provided waterproofing membrane and honors the warranty period.
When Professional Engineers Are Required
Certain complex renovations require the expertise of a Qualified Person (QP) or Professional Engineer (PE) registered with the Professional Engineers Board of Singapore:
- Demolition of non-load bearing reinforced concrete elements
- Enclosure of balconies (requires SCDF fire safety clearance)
- Any alteration HDB's technical department deems requiring professional certification
- Complex structural assessments beyond standard wall removal