HDB Renovation Cost Guide Singapore 2026: What Everything Actually Costs
- YuTing
- 5 days ago
- 6 min read
Renovating a 3-room HDB flat in Singapore in 2026 costs between SGD 35,000 and SGD 90,000 depending on scope, material quality, and whether carpentry is in-house or subcontracted. A 4-room HDB runs SGD 50,000–120,000, and a 5-room SGD 65,000–150,000 for a full renovation. Here is what drives those numbers — and where the money actually goes.
This guide is based on The Design Factory's project data from HDB renovations completed across Singapore in 2025–2026. We have kept every number honest. Figures do not include loose furniture, appliances, or air-conditioning unless stated.
Section 1: Quick Reference Cost Table by Flat Type
The table below is the starting point. Use it to establish a realistic baseline before you engage any contractor or interior design firm.
Flat Type | Essential (SGD) | Mid-Range (SGD) | Premium (SGD) |
2-Room Flexi | 20,000–35,000 | 35,000–55,000 | 55,000–80,000 |
3-Room | 35,000–55,000 | 55,000–80,000 | 80,000–110,000 |
4-Room | 50,000–75,000 | 75,000–110,000 | 110,000–140,000 |
5-Room / Executive | 65,000–95,000 | 95,000–130,000 | 130,000–165,000 |
Figures based on TDF project data and Singapore market rates as of Q1 2026. Excludes furniture, loose items, and appliances.
If you are collecting BTO keys, also read our complete BTO interior design room-by-room guide for 2026, which covers design execution and room-by-room decisions for first-time homeowners.
What Each Budget Tier Actually Includes
Essential Tier (SGD 35,000–75,000 for a 4-room HDB)
An essential renovation covers the mandatory and functional works: HDB-required waterproofing, an electrical system upgrade if needed, basic vinyl flooring across common areas, painting throughout, one bathroom upgrade with standard tiling, and a basic kitchen refresh (repainting existing cabinets or replacing cabinet doors without changing the carcass). No custom carpentry. Furniture comes from IKEA or off-the-shelf retailers.
Mid-Range Tier (SGD 75,000–110,000 for a 4-room HDB)
The mid-range tier adds the carpentry package that transforms a flat from functional to finished: a full-height wardrobe in the master bedroom, a custom TV console with concealed cable management, a shoe cabinet at the entrance, and full kitchen cabinet replacement. Add a feature wall in the living room, a proper lighting design with cove lighting, and a full bathroom renovation with semi-premium 60×60cm porcelain tiles.
The biggest cost jump between tiers is almost always carpentry — custom joinery can add SGD 15,000–40,000 to a renovation budget, but it is also the element that ages best and adds the most to resale value. |
Premium Tier (SGD 110,000–165,000 for a 4-room HDB)
The premium tier is full-home custom carpentry in E0 plywood, premium tile selection (large-format porcelain or natural stone), a designer lighting scheme with scene controls, bespoke joinery details throughout, and professional project management from brief to handover.
For a full explanation of why in-house E0 carpentry costs less long-term than outsourced joinery — despite a higher upfront price — see our E0 plywood guide.
Cost Breakdown by Trade
For a mid-range 4-room HDB renovation, here is how the budget is typically distributed across trades. These percentages are averages — carpentry and tiles can exceed 50% combined at the premium tier.
Trade | % of Total Budget | Typical SGD Range (4-room, mid) |
Carpentry / joinery | 30–40% | SGD 22,000–44,000 |
Tiling (floors + bathrooms) | 15–20% | SGD 11,000–22,000 |
Electrical works | 8–12% | SGD 6,000–13,000 |
Plumbing | 5–8% | SGD 4,000–9,000 |
Painting | 4–6% | SGD 3,000–7,000 |
False ceiling + cornice | 5–8% | SGD 4,000–9,000 |
Aircon installation | 5–8% | SGD 4,000–9,000 |
ID design fee | 8–15% | SGD 6,000–17,000 |
When comparing tiling quotes, read our guide on how to choose the right tiles for your HDB bathroom — material choice alone can shift the tiling budget by 40–60%.
Hidden Costs That Blow HDB Renovation Budgets
Most budget overruns are not contractor fraud — they are predictable surprises that a good brief and contingency budget would have absorbed. Here are the six most common:
1. Hacking discoveries — concealed pipes in walls, corroded plumbing behind tiles, structural beams in unexpected positions. Budget a SGD 2,000–8,000 contingency before you start.
2. HDB permit fees — Renovation permits through the HDB One Portal cost SGD 10–20 per permit type. Minor, but not zero.
3. Disposal fees — debris removal for a full hack-and-redo runs SGD 500–2,000 depending on flat size.
4. Defect rectification in resale HDB — existing defects discovered during hacking are not covered by any renovation warranty.
5. ID design fee quoted separately — some firms quote construction cost only, then add the ID fee later. Always ask for an all-in quotation.
6. Furniture is not renovation — most renovation quotes exclude furniture, loose items, and appliances entirely. Add SGD 10,000–30,000 for full-home furnishing on top of your renovation quote.
Before you sign anything, run through our guide on how to work with an interior designer without overspending — it covers how to read a renovation quote and spot provisional sums that can blow your budget by 20%.
How to Control Your HDB Renovation Budget
• Get an itemised BOQ (bill of quantities) — not a lump sum — before comparing quotes. Our guide on 10 questions to ask your renovation contractor includes a BOQ checklist.
• Prioritise in order: waterproofing and electrical first, carpentry second, finishes third, furnishing last.
• Ask every ID firm: 'Is your carpentry in-house or outsourced?' In-house eliminates a 15–25% subcontractor margin on joinery. Read why your ID's carpentry should not be outsourced.
• Phase non-essential loose works: curtains, accent furniture, and smart-home upgrades can be added after move-in with zero disruption.
• Batch with neighbours: if adjacent units are also renovating, coordinating shared haulage and some trades can reduce cost.
⚠️ Wet works (tiling, hacking, waterproofing, plumbing) should never be deferred to Phase 2 in an occupied home. The disruption is immense. Defer only loose items — curtains, accent furniture, smart devices, and decorative pieces. |
BTO vs Resale HDB — Why Costs Differ
A BTO renovation starts from bare concrete. More flexibility, but more base work: all waterproofing, all finishes, and all carpentry from scratch. Typical cost is 10–20% higher than an equivalent resale scope because of the additional base works.
A resale HDB renovation may have reusable existing finishes — which reduces cost — but hacking existing tiles and removing old carpentry adds labour and disposal costs. The final number is condition-dependent. Always do a physical inspection before accepting any quote based on floor plans alone.
For BTO-specific guidance on what to renovate first and in what order, read the full BTO renovation tips and timeline guide.
If you are collecting BTO keys in 2026, The Design Factory offers a BTO renovation consultation — WhatsApp Rachel at +65 8198 6002 |
Yu Ting's Cost-Per-Room Breakdown (HDB-Specific)
These are construction-only figures for a mid-range 4-room HDB renovation. Loose furniture and appliances are excluded.
Room | Mid-Range Cost (SGD) | What Is Included |
Living + dining | 15,000–35,000 | Flooring, feature wall, TV console, cove lighting, painting |
Master bedroom | 8,000–18,000 | Full-height wardrobe, flooring, headboard feature wall, lighting |
Common bedroom | 4,000–10,000 | Wardrobe, flooring, painting |
Master bathroom | 6,000–18,000 | Full hack and relay, new tiles, sanitary fittings, shower screen |
Common bathroom | 4,000–12,000 | Tiles, fittings, waterproofing |
Kitchen | 8,000–25,000 | Cabinets, countertop, hob, hood, backsplash |
For a full funding strategy — including CPF usage, renovation loans, and budget sequencing — read how to plan and fund your perfect home renovation in Singapore.
To understand where to cut and where cutting costs you more later, read our guide on where to save vs splurge in your renovation.
Frequently Asked Questions
Q: How much does it cost to renovate a 3-room HDB in Singapore in 2026?
A: A 3-room HDB renovation in Singapore costs SGD 35,000–110,000 in 2026, depending on scope and finish level. An essential renovation (flooring, painting, one bathroom) runs SGD 35,000–55,000; a full premium renovation with custom carpentry runs SGD 80,000–110,000.
Q: How much does it cost to renovate a 4-room HDB in Singapore?
A: A 4-room HDB renovation in Singapore costs SGD 50,000–140,000 in 2026. Mid-range renovations with custom carpentry, full bathroom, and feature wall run SGD 75,000–110,000.
Q: What is the most expensive part of an HDB renovation?
A: Custom carpentry and joinery — wardrobes, kitchen cabinets, TV console — typically account for 30–40% of an HDB renovation budget. It is the single largest cost category.
Q: Can I renovate my HDB for under SGD 50,000?
A: Yes. An essential HDB renovation covering flooring, painting, one bathroom upgrade, and a basic kitchen refresh can be completed for SGD 35,000–50,000 on a 3-room flat if custom carpentry is minimised.
Start Your HDB Renovation Conversation
The Design Factory provides transparent, itemised quotations for HDB renovation projects across Singapore. If you are planning a renovation in 2026 and want a realistic first estimate, WhatsApp Rachel at +65 8198 6002 — mention this guide for a priority slot.
Guide accurate as of Q1 2026. We update this annually.
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