8 Essential Tips for Renovating an Old HDB Resale Flat

Hamid and Sons
3 days ago
3 min read

Updated: 11 hours ago

What every homeowner should know before the first tile is laid

Old HDB flats have a charm of their own from spacious layouts to strategic locations in mature estates. But when it comes to renovation, they also come with hidden challenges that can trip up even the most enthusiastic homeowners.

At Hamid and Sons Interior, we've transformed thousands of HDB flats since 1980. Whether it's a 3-room or executive unit, we’ve seen it all... the good, the bad, and the unexpected. Here’s our essential room-by-room guide to help you renovate with confidence and avoid common pitfalls.

1. Electrical Systems & Appliances: Upgrade for Safety and Efficiency

Outdated wiring isn’t just a safety risk. It can’t support today’s tech-heavy lifestyles. Old water heaters, lights, aircon units, and ceiling fans also tend to be less energy-efficient, driving up your utility bills.

💡 Tip: Rewire your home for safety, and switch to LED lighting and inverter air-conditioners for lower electricity use and a greener home.

2. Plumbing: Fix Leaks Before They Cause Damage

Older plumbing systems often hide rusted pipes and clogs that aren’t visible until it’s too late. Water seepage can lead to mould and rot in kitchens and bathrooms.

💡 Tip: Always inspect and replace corroded pipes, and ensure waterproofing is solid before laying tiles or installing fittings.

3. Flooring: Overlay with Caution

Vinyl flooring is popular, but if you lay it over cracked or hollow tiles, you risk instability, squeaks, and long-term issues with water damage.

💡 Tip: For high-use or wet areas, it’s often better to hack and re-tile. A solid foundation makes all the difference.

4. Ceilings & Spalling Concrete: Look Up Before You Build Down

Uneven ceilings in older flats can complicate lighting, carpentry, or aircon installation. On top of that, if you see flaky patches on the ceiling, that could be spalling concrete, a common issue where corroded steel bars expand and damage the ceiling surface.

💡 Tip: Address spalling early. Our team will remove loose concrete, treat the steel, and restore a safe and clean finish.

Our designers at Hamid and Sons Interior can help you work around these quirks without compromising on style or function.

5. Windows, Doors & Grilles: Replace for Safety & Comfort

Loose hinges, worn wooden frames, and rusty grilles are more than just cosmetic concerns. They’re a safety hazard and often allow in heat or noise from outside.

💡 Tip: Replacing these elements during renovation improves security and reduces future maintenance.

6. Air Conditioning: Plan It Into the Design

Aircon upgrades are common in old flats. But retrofitting after renovation leads to exposed trunking and messy rerouting.

💡 Tip: Install or reposition aircon units during renovation for better cooling, cleaner aesthetics, and cost savings.

7. Structural Integrity: Don’t Ignore the Cracks

Hairline cracks are expected, but larger ones, sagging walls, or outdated fuse boxes could signal deeper structural issues.

💡 Tip: Let our team inspect and flag any red flags early. We’ll work with licensed professionals to ensure compliance and safety.

8. Budgeting & Planning: Expect the Unexpected

Renovating older flats typically costs more due to hacking, upgrading utilities, and custom carpentry. Hidden issues often surface mid-way.

💡 Tip: Set aside a flexible budget, renovations for older flats can range from $60,000 to $150,000. With over 40 years of experience, we’ll help you plan wisely and renovate without regrets.

Final Word

Old flats deserve a second life, and with the right expertise, they can become your dream home. At Hamid and Sons Interior, we combine timeless design with solid construction to bring out the full potential of any HDB unit.

Ready to start your renovation journey? Let’s talk. Your ideal space is just a consultation away.