What Can You Renovate in an HDB Flat? Rules Guide (2026)

What Can You Renovate in an HDB Flat? Rules Guide

Before you knock down a wall or retile a bathroom, it's worth knowing the rules. HDB sets clear guidelines on what you can and can't renovate, what needs approval, and what's strictly off-limits — and breaking them can mean fines or being made to reinstate the original. This guide explains what you can renovate in an HDB flat in 2026 and how to stay compliant.

What You Can Renovate in an HDB Flat

Most cosmetic and non-structural works are allowed (many with approval):

• Flooring and tiling — overlay or hacking and re-laying.
• Kitchen and wardrobe carpentry — fitted cabinets and built-ins.
• False ceilings and L-boxes.
• Painting and wall finishes.
• Lighting and electrical points (by a licensed electrician).
• Plumbing fixtures — sinks, taps, toilet bowls.
• Non-structural wall changes — with HDB approval.

What Is Prohibited in HDB Flats

Some works are never allowed because they affect safety:

• ❌ Hacking structural walls, columns, or beams.
• ❌ Altering the structural floor slab.
• ❌ Removing or altering the household (bomb) shelter.
• ❌ Overloading the floor beyond limits.
• ❌ Tampering with the facade, windows, or mains beyond allowed scope.
• ❌ Works affecting neighbouring units.

If in doubt, assume a wall may be structural and confirm before touching it.

What Works Need HDB Approval

Many renovations require an HDB renovation permit, applied for by your HDB-registered contractor. These commonly include hacking or removing walls, building partitions, wet-area waterproofing and floor changes, and relocating electrical or plumbing points. Our HDB renovation permit guide covers the approval process in detail.

Hacking Rules and Restrictions

Wall hacking is one of the most regulated works. Only non-structural walls can be hacked, with approval, and there are time restrictions on hacking bathroom/toilet floors in new flats (commonly three years, while waterproofing is under warranty). See our HDB hacking cost guide for pricing and what's involved.

Renovation Timing and Noise Rules

Even allowed works must follow HDB's permitted hours, and noisy or dusty works have tighter windows. Plan around them using our HDB renovation timing and noise rules guide so you stay on good terms with neighbours and avoid complaints.

Using an HDB-Registered Contractor

Renovation works that need a permit must be carried out by a contractor on HDB's Registered Renovation Contractors Scheme (RCRS). Using a registered contractor protects you and ensures the permit and works are handled correctly — our guide on finding the best HDB renovation contractor explains how to verify and shortlist them.

A Quick Compliance Checklist

1. Confirm which works need approval before you start.
2. Verify walls are non-structural before any hacking.
3. Use an HDB-registered (RCRS) contractor.
4. Respect time restrictions on wet-area floors in new flats.
5. Keep works within permitted hours.

Common HDB Renovation Rule Mistakes

• Assuming a wall is non-load-bearing — always confirm first.
• Skipping the permit — unapproved works can mean fines or reinstatement.
• Touching the household shelter — never alter it.
• Ignoring timing rules — noisy work outside permitted hours draws complaints.

Plan a Compliant Renovation Before You Start

Knowing the rules early saves money and stress. Upload a photo of your flat to ElumiHome to visualise your renovation — and plan a design that works within HDB's guidelines before you commit to a contractor.