HDB Home Repairs: What You Can and Can't Do Yourself

You've got a YouTube tutorial bookmarked, a weekend free, and a stubborn leaky cabinet hinge. How hard can it be?

Harder than you think — but not for the reasons you'd expect. The issue isn't whether you can physically change a hinge or repaint a wall. It's whether the Housing & Development Board (HDB) will consider what you're doing a "renovation" requiring approval, or just regular maintenance that's perfectly fine.

Get this wrong, and you could face fines, forced rectification, or complications when you eventually sell your flat. Let's make sure that doesn't happen.

The Basic Framework: What HDB Considers a "Renovation"

HDB's renovation rules are built around one key distinction: routine maintenance vs structural/cosmetic renovation. The former is generally fine without approval. The latter requires a permit, and in some cases, must be done by an HDB-licensed contractor.

Here's the practical version of what that means for your home repairs.

What You Can DIY Without HDB Approval

These are the everyday repairs and maintenance tasks that are perfectly fine to handle yourself:

Plumbing (Minor)

• Replacing a tap washer or faucet cartridge
• Changing a showerhead
• Unclogging a basic drain blockage
• Replacing a toilet seat
• Tightening loose connections under the sink

What you can't DIY: Any work on the main water supply pipe, concealed pipes within walls, or the common drainage stack. These require a PUB-licensed plumber, and in HDB contexts, potentially HDB notification if it involves common property.

Electrical (Very Minor)

• Replacing a light bulb or LED panel (same wattage, same fitting)
• Changing a switch plate cover (same switch, no wiring changes)
• Plugging in appliances

What you can't DIY: Anything involving actual wiring — adding new power points, moving switches, changing circuit breakers, installing new lighting fixtures that require new wiring. All electrical work in HDB flats must be done by a licensed electrician. This is a safety regulation, not just HDB being bureaucratic. Faulty electrical work causes fires.

Painting and Minor Cosmetic Touch-ups

• Repainting walls (same colour scheme, internal walls only)
• Touching up scratches and scuffs
• Replacing light switch covers or door handles (same style and position)

What you can't DIY (without approval): Painting the exterior of your unit (including windows and grilles visible from outside). HDB has colour guidelines for building exteriors, and painting your gate a colour that clashes with the block is technically a violation — though enforcement varies.

Door and Furniture Repairs

• Fixing cabinet hinges and drawer slides
• Reattaching loose shelves
• Repairing door handles and locks
• Tightening furniture joints

Appliance Maintenance

• Cleaning aircon filters
• Defrosting the fridge
• Cleaning the washing machine drum
• Replacing water filter cartridges

These are basic homeowner maintenance. No approvals needed.

Tiling and Grout (In-Kind Replacement)

• Re-grouting tiles with the same type of grout
• Replacing a single cracked tile with the same size and type

What you can't DIY (without approval): Hacking or replacing tiles in a way that exposes the waterproofing membrane, or any tiling work in wet areas (toilet, kitchen floor) that goes beyond surface-level grout repair.

What Needs HDB Approval Before You Start

This is where most homeowners get tripped up. HDB approval is required for renovations that change the structure, appearance, or essential services of your flat.

Structural Modifications

• Hacking or demolishing any wall — including what you think is a non-structural partition wall. HDB needs to verify which walls are load-bearing before you touch anything.
• Making new openings in walls (for doors, windows, or passages)
• Extending or modifying the floor plan — adding a room, enclosing a balcony, or converting a bomb shelter

Flooring and Waterproofing

• Full flooring replacement — replacing all tiles, installing vinyl, laminate, or wood flooring requires approval, especially in wet areas where waterproofing must be maintained.
• Any work that involves hacking tiles in the toilet, kitchen, or service yard. This exposes the waterproofing membrane, and HDB needs to ensure it's properly restored. Failure to do so is one of the most common causes of neighbour disputes.
• Epoxy grouting of the entire bathroom surface generally falls under the maintenance category if you're not hacking tiles — but large-scale work can blur the line. When in doubt, check with HDB.

Electrical Upgrades

• Adding new power points or sockets
• Installing new lighting fixtures that require new wiring
• Changing the electrical layout of any room
• Installing or replacing circuit breakers

All electrical work must be done by a Licensed Electrical Worker (LEW) and submitted to SP Group and HDB.

Plumbing Upgrades

• Relocating water points (moving the kitchen sink position, for example)
• Adding new water supply or drainage points
• Modifying the gas supply line (HDB no longer allows gas in new flats, but older flats still have gas piping)

Window and Grille Modifications

• Changing window grilles — any modification to window grilles, including replacing existing grilles with different styles, requires approval.
• Adding or removing window grilles — HDB has strict safety requirements for upper-floor units. Removing grilles is almost never approved for safety reasons.
• Installing or modifying awnings or sunshades — these affect the building exterior and need approval.

External and Common Property

• Any work on the building exterior — painting, tiling, or modifications visible from outside the flat.
• Modifications to common corridors — even storing things on the corridor beyond your unit's allocated space is technically regulated.
• Modifications to the aircon ledge — installing additional outdoor units or modifying the ledge structure requires approval.

The Approval Process: What to Expect

If your repair or renovation falls into the "needs approval" category, here's how the process works:

1. Identify whether you need approval. HDB's website has a renovation permit checklist. When in doubt, call HDB's hotline (1800-225-5432) or visit your nearest HDB Hub.
2. Engage an HDB-licensed contractor. Major renovations must be done by a contractor registered with HDB. This is non-negotiable for structural work, flooring, and wet-area renovations.
3. Submit the renovation application. Your contractor usually handles this, but you (as the flat owner) are ultimately responsible. The application includes renovation plans, drawings if applicable, and the contractor's licence details.
4. Wait for approval. Processing typically takes about 1-2 weeks for straightforward applications, longer for complex modifications.
5. Work begins under the permit. The permit specifies what can be done. Deviating from the approved scope is a violation.
6. Completion and inspection. Some works (particularly waterproofing in wet areas) may require inspection upon completion.

The Penalties: What Happens If You Get It Wrong

HDB takes renovation violations seriously, and the consequences range from annoying to genuinely costly:

• Fines of up to SGD $5,000 for carrying out unauthorised renovation works.
• Direction to reinstate — HDB can order you to restore the flat to its original condition at your own expense. Imagine paying to hack your new floor, re-tile everything to HDB's specifications, and restore the waterproofing. That's potentially a five-figure bill.
• Forfeiture of your flat — in extreme cases (though rare), HDB has the legal right to take back your flat for serious breaches of the lease conditions. This is the nuclear option, but it exists.
• Complications when selling — unauthorised modifications discovered during the sale process can delay or derail the transaction. Buyers' lawyers will flag these, and HDB's consent to transfer may be conditional on rectification.
• Insurance implications — if an unapproved modification causes damage (e.g., a DIY waterproofing job that leaks), your home insurance may not cover it. Your neighbour's claim against you, however, will still stand.

The most common penalty people actually face is the neighbour dispute. If your DIY waterproofing job leaks into the unit below, you're liable for their repair costs — and those can easily run into thousands.

Practical Advice for Common HDB Repair Scenarios

"My toilet is leaking — can I fix it myself?"

A dripping tap or running cistern: probably yes, for minor fixes. Water pooling on the floor or leaking through the ceiling to the unit below: call a professional, and potentially notify HDB. Waterproofing-related leaks in HDB flats are taken very seriously because they affect structural integrity over time.

"Can I replace my own flooring?"

Surface-level replacements (like putting vinyl over existing tiles, where no hacking is involved) are generally less problematic than full hacks-and-retile jobs. But HDB still recommends notification for flooring changes in wet areas. The safest approach: get advice from HDB before starting.

"My aircon needs a new bracket — is that DIY?"

Minor bracket tightening or replacement of the same type: usually fine. Installing a new outdoor unit, changing the position, or modifying the aircon ledge: that's approval territory.

"Can I install my own shelving and cabinets?"

Freestanding furniture and wall-mounted shelving on internal walls is fine. Built-in cabinets that are fixed to the structure (cemented to the floor or wall) may be considered renovation, especially if they involve hacking or new fixtures.

When to DIY vs When to Get Help

The honest recommendation:

• DIY if: It's a surface-level fix on internal elements, involves no structural changes, no electrical wiring, no plumbing modifications, and doesn't affect waterproofing or common property.
• Call a professional if: Any of the above apply, or you're simply not confident. A botched job in an HDB flat has consequences that extend beyond your own four walls — literally.
• Get HDB approval if: You're modifying structure, wet areas, the exterior, common areas, or anything involving electrical or plumbing layout changes.

Not sure where your repair falls? Harlo Unkle's service pages can help you understand what type of professional you need, and many of our listed providers know HDB regulations inside and out.

The Bottom Line

HDB's renovation rules exist to protect you and your neighbours. They're not there to make your life difficult — though it can feel that way when you just want to fix a leaking pipe. The practical reality is that most everyday repairs fall into the "just do it" category, and the ones that need approval are the ones where getting it wrong has real consequences.

When in doubt: check first, fix second. A five-minute call to HDB can save you months of hassle and thousands in rectification costs.

Frequently Asked Questions

Do I need HDB approval to paint my flat?
Internal painting is fine without approval. Painting the exterior of your flat (including windows and grilles visible from outside) requires HDB approval, as exterior colours must comply with HDB's guidelines.

Can I replace my toilet in an HDB flat?
Yes, but it typically requires HDB approval because it involves waterproofing and plumbing work. You'll need a PUB-licensed plumber, and the waterproofing must be done correctly — HDB may inspect upon completion.

What renovations require HDB approval in 2026?
Any work involving structural modifications, hacking of walls or floors, changes to electrical or plumbing layout, window/grille modifications, wet area work (toilet, kitchen), and anything affecting the building exterior or common property.

Can I do my own waterproofing in an HDB toilet?
Minor surface-level waterproofing treatments (like epoxy grouting) are generally acceptable as maintenance. Full waterproofing that involves hacking tiles should be done by a professional and may require HDB notification. Given the risk of leakage affecting neighbours, professional work is strongly recommended.

What's the fine for unauthorised HDB renovation?
Fines can go up to SGD $5,000, plus HDB can order you to reinstate the flat to its original condition at your own expense. In serious cases, it can affect your flat ownership.

Can I remove the grilles from my HDB windows?
Generally no. HDB requires window grilles for safety, especially on upper floors. Removing grilles can result in fines and is a safety hazard. Even replacing grilles with a different design requires approval.

Is it legal to add a room in my HDB flat?
Only with HDB approval, and only if the modification complies with HDB's floor plan guidelines. Enclosing a balcony, for example, requires approval and must meet specific criteria. Adding rooms by hacking structural walls is typically not allowed.

Published by Harlo Unkle Editorial Team — your local guide to home services in Singapore. Need help with an HDB repair? Find licensed pros in your area.