Resale HDB Renovation in Singapore (2025) Cost, Rules & Timeline
Resale HDB flats remain one of the most popular housing choices in Singapore. They often come with bigger layouts, prime locations in mature estates, and sometimes even unique floor plans no longer found in new Build-to-Order (BTO) projects.
But with these benefits comes a challenge: most resale flats are 10–30 years old, meaning outdated finishes, hidden structural wear, and compliance requirements. Renovating a resale HDB is very different from starting fresh in a new flat.
This comprehensive 2025 guide will cover:
- ✅ The latest resale HDB renovation cost ranges
- ✅ Official HDB rules and permit requirements
- ✅ A practical step-by-step renovation timeline
- ✅ Hidden costs unique to older flats
- ✅ Tips to avoid common renovation mistakes
If you’re planning a resale renovation, bookmark this page—it will save you time, money, and stress.
💰 Updated Resale HDB Renovation Costs in 2025
Renovation costs can vary widely depending on flat size, age, and how extensive your makeover is. Based on 2025 estimates from renovation trackers and contractor case studies, here are the average ranges:
| Flat Type | Average Cost Range (2025) |
|---|---|
| 3-Room Resale HDB | S$51,000 – S$61,800 |
| 4-Room Resale HDB | S$64,300 – S$80,300 |
| 5-Room Resale HDB | S$84,300 – S$97,000 |
Cost Drivers Explained
- Hacking & Masonry Works (S$8,000–S$15,000) – Removing old tiles, demolishing walls, re-tiling bathrooms/kitchens.
- Carpentry (S$12,000–S$25,000) – Kitchen cabinets, wardrobes, TV consoles, study desks.
- Electrical & Rewiring (S$4,000–S$8,000) – Full rewiring, DB box upgrade, additional sockets.
- Plumbing (S$2,500–S$5,000) – Pipe replacements, new bathroom/kitchen fixtures.
- Ceiling & Painting (S$3,000–S$7,000) – False ceilings, light troughs, wall painting.
- Windows & Doors (S$2,000–S$6,000) – HDB-approved window frames, main door, room doors.
- Miscellaneous & Hidden Costs (S$3,000–S$8,000) – Site protection, waterproofing tests, floor levelling.
👉 Pro Tip: Always set aside 10–15% contingency for surprises.
🏛️ HDB Renovation Rules You Cannot Ignore
- Only HDB-Registered Contractors Can Apply for Permits
- Restricted Works Require Approval
- Hacking of walls (especially structural)
- Replacing bathroom/kitchen tiles
- Window replacements (must use HDB-approved designs)
- Working Hours: Mon–Fri: 9am – 6pm (no noisy works on weekends/public holidays)
- Permit Validity: Resale flats – 1 month | New flats – 3 months
⚠️ Warning: Hacking without approval can result in fines or reinstatement costs.
⏱️ Resale HDB Renovation Timeline (Step-by-Step)
A well-planned renovation should be completed within 4–6 weeks for resale units. Below is a typical sequence:
Preparation & Hacking
- Site protection (corridors, lifts, floors)
- Demolition of old tiles, walls, carpentry
- Initial electrical & plumbing work
Wet Works & Masonry
- Bathroom & kitchen tiling
- Waterproofing membrane application
- Water ponding tests
Electrical & Ceiling Works
- Rewiring, DB box upgrade
- False ceiling installations
- Aircon trunking
Carpentry Fabrication
- Kitchen cabinets built off-site
- Wardrobes, TV console, study desks
- Paint prep & wall finishing
Carpentry Installation
- Cabinets, wardrobes, countertops
- Sanitary fittings and lighting
- Touch-up painting
Final Handover
- Cleaning & polishing
- Defects rectification
- HDB inspection & closure
🕵️ Hidden Costs Unique to Resale Flats
- Full Rewiring: Old circuits may not support modern appliances.
- Plumbing Overhaul: Ageing pipes often leak.
- Waterproofing Failures: Bathrooms may leak into lower units.
- Floor Levelling: Uneven floors after hacking require screeding.
- Window Safety: Old frames may not meet HDB standards.
💡 Budget for these early to avoid stress.
🚫 Common Mistakes to Avoid
- Underestimating Costs – Forgetting plumbing/electrical.
- Skipping Permits – Doing “small works” without approval.
- Ignoring Timeline – Missing HDB’s 1-month rule.
- Not Checking Contractor Credentials – Always ensure HDB-registered.
- Poor Space Planning – Oversized carpentry makes flats cramped.
📞 Why Choose SpeedyDecor.com Pte Ltd?
- ✅ End-to-end service: From hacking to carpentry, one accountable team.
- ✅ HDB-compliant: All permits and rules handled.
- ✅ Experienced designers: Specialising in older flat layouts.
- ✅ Transparent pricing: No hidden add-ons.
👉 Ready to renovate your resale HDB?
📱 Call/WhatsApp: +65 8839 3899
Your dream home makeover starts here.
