Renovation costs in Singapore range from S$30,000 for a basic 3-room HDB refresh to S$150,000 or more for a fully-fitted resale condo (as of 2026-06). Carpentry typically claims the largest share. Build your budget by category, add a 10% contingency, and get at least three quotes before signing any contract.
Collecting keys is exhilarating — until a contractor hands you a quotation that reads like a small car purchase. Singapore renovation costs catch many new homeowners off-guard, not because contractors are dishonest, but because most buyers have no mental model for what each trade actually costs. This guide breaks the total bill into its component parts, explains the big pricing levers, and walks you through a practical budget-building process so you can walk into every showroom conversation well-prepared.
Whether you have just collected keys to a BTO flat or are taking over a 20-year-old resale unit, the principles are the same: understand what you are buying, know the rules that constrain you, and never skip the contingency fund.
Why renovation costs vary so widely in Singapore
Two forces shape your renovation bill more than any other: the condition of the unit and the tenure type. A brand-new BTO flat is essentially a blank slate — bare cement floors, unpainted walls, no carpentry, and plumbing already roughed-in by HDB. The contractor starts building, not demolishing. A 20-year-old resale HDB unit, by contrast, may need full hacking of existing tiles and feature walls, complete rewiring of the electrical distribution board, replacement of aging plumbing risers, and removal of dated carpentry — all before a single new tile is laid. This demolition and preparation work (known as the hacking and rewiring phase) easily adds S$8,000–S$20,000 to a resale project that a BTO owner simply does not face.
The second force is property type and its regulatory regime. HDB flat owners must engage an HDB-registered renovation contractor and obtain an HDB Renovation Permit before any structural or wet work begins. Structural walls — those shown on the approved building plan — cannot be hacked under any circumstances. Wet-work activities (hacking of floor/wall tiles, bathroom works, new sanitary fittings) are restricted to weekdays between 9 am and 5 pm and must be completed within three months of the permit start date. Condominium owners face a different set of rules: the Management Corporation Strata Title (MCST) governs what work is permitted, when contractors may enter the building, and which alterations require written approval. MCST by-laws vary significantly between developments, so always request the by-laws from the management office before finalising your design.
Understanding these constraints is not just a compliance exercise — they directly affect cost. HDB-registered contractors command a modest premium because the pool is smaller and accountability is higher. MCST approval timelines (sometimes two to four weeks) affect project scheduling and may delay contractor start dates, which in turn affects pricing if your contractor's crew is not immediately available again.
Finally, the choice between an interior design (ID) firm and a direct main contractor carries a cost differential of roughly 15–30%. An ID firm provides design consultancy, project management, and a single point of accountability — but you are paying for that coordination layer. A direct contractor is cheaper but requires you to manage each trade (tiler, carpenter, electrician, plumber, painter) yourself and to resolve any scheduling conflicts between them.
Congratulations, you just bought a condo! Now comes the part no one warns you about: renovation. That "move-in ready" unit still needs built-in wardrobes, a new kitchen backsplash, fresh paint, and aircon servicing at minimum. The question is: how much should you budget?
Renovation is the number-one post-purchase surprise cost for Singapore condo buyers. This estimator breaks costs down by category — from hacking to carpentry to kitchen — across budget, mid-range, and premium tiers. No more guessing.
What This Calculator Does
Renovation is often the biggest hidden cost of buying a condo. Estimate your renovation budget by category — hacking, plumbing, electrical, carpentry, painting, aircon, and kitchen — for budget, mid-range, and premium tiers. Plan your dream home without blowing your budget.
You can find this calculator in the Calculators tab on ShiokNest. It updates results instantly as you adjust inputs — no waiting, no page reloads.
Why This Matters
Renovation costs are the most frequently underestimated expense in property ownership. First-time buyers typically budget $30K-$50K and end up spending $60K-$80K. This calculator matters because:
- It breaks costs into categories so you can prioritise what matters most
- It gives you realistic ranges (budget to premium) for each category
- It helps you negotiate with contractors by knowing what is reasonable
- It prevents the painful situation of running out of budget mid-renovation
What You Will Discover
After running this calculator with your personal numbers, you will know:
- Expected cost ranges for each renovation category
- Budget, mid-range, and premium total estimates for your unit size
- Which categories consume the most budget (hint: carpentry and kitchen)
Key Inputs Explained
Here are the inputs you will configure, along with their default values. Each default is calibrated to a realistic Singapore condo scenario so you can explore results immediately.
| Field | Description | Default Value |
|---|---|---|
| Floor Area (sqft) | The unit floor area in square feet. | 1,000 sqft |
Step-by-Step Guide
- 🏠 Navigate to Calculators — Click the "Calculators" tab in the ShiokNest navigation bar. All 26 calculators are grouped by purpose for easy access.
- 🔍 Select the calculator — Choose "How to Estimate Renovation Costs" from the calculator list. You will see default values already loaded so you can explore immediately.
- ✏️ Enter your values — Replace the defaults with your own numbers. The key fields are:
- Floor Area (sqft) — The unit floor area in square feet.
- 📊 Review the results — The calculator updates instantly as you change any input. A detailed cost table shows budget, mid-range, and premium estimates for each renovation category, with totals for easy comparison.
- 🔄 Run what-if scenarios — This is where the real power lies. Change one variable at a time to see its impact. For example, try increasing the interest rate by 1% or extending your holding period by 5 years. Note how the results shift.
- 💾 Compare and decide — Run 2-3 different scenarios and note the results. This gives you a range of outcomes to base your decision on, rather than relying on a single projection.
Worked Example
Meet Sarah and Tom, renovating their newly-purchased 1,000 sqft condo in Bishan. They received quotes from 3 contractors and want to understand what is reasonable. Here are typical cost ranges by category:
| Category | Budget | Mid-Range | Premium |
|---|---|---|---|
| Hacking & Masonry | $3,000–$5,000 | $5,000–$10,000 | $10,000–$20,000 |
| Plumbing | $2,000–$4,000 | $4,000–$8,000 | $8,000–$15,000 |
| Electrical | $2,000–$4,000 | $4,000–$8,000 | $8,000–$12,000 |
| Carpentry | $5,000–$10,000 | $10,000–$25,000 | $25,000–$50,000 |
| Painting | $1,500–$3,000 | $3,000–$5,000 | $5,000–$8,000 |
| Aircon | $2,500–$4,000 | $4,000–$7,000 | $7,000–$12,000 |
| Kitchen | $3,000–$6,000 | $6,000–$15,000 | $15,000–$30,000 |
| Total | $19,000–$36,000 | $36,000–$78,000 | $78,000–$147,000 |
The reality: Most new condo owners underestimate renovation costs. A "simple" renovation easily runs $40K–$60K once you add carpentry (built-in wardrobes, kitchen cabinets) and aircon. Premium renovations with designer finishes can exceed $100K. Use the estimator to build a realistic budget before signing any renovation contract.
Real-World Scenarios to Try
Here are some realistic scenarios you can plug into the calculator right now. Each one reflects a common situation Singapore property buyers face.
| Scenario | Settings to Try | What You Will Learn |
|---|---|---|
| Compact 2BR (700 sqft) | Area: 700 sqft, Budget tier | Minimum renovation cost for a small condo — can you do it under $25K? |
| Family 3BR (1,100 sqft) | Area: 1,100 sqft, Mid-range tier | Realistic budget for a family home with decent finishes |
| Luxury 4BR (1,500 sqft) | Area: 1,500 sqft, Premium tier | What a full premium renovation costs for a large unit |
Expert Tips and Common Pitfalls
💡 Pro Tips
- Use realistic assumptions — Singapore condo appreciation has historically averaged 2-4% per year. Avoid overly optimistic projections. When in doubt, use 3% as a baseline.
- Budget 10-20% contingency — Hidden wiring, plumbing issues, or last-minute design changes always add cost. Never spend your entire budget upfront.
- Get at least 3 quotes — Renovation quotes can vary by 30-50% for the same scope. Always compare and ask for itemised breakdowns.
- Prioritise structural over cosmetic — Spend on plumbing, electrical, and waterproofing first. Pretty tiles on bad plumbing will cost you more in the long run.
⚠️ Common Pitfalls
- Starting work before permit — Some renovation works require MCST or HDB approval. Starting without approval can result in fines or mandatory reversal.
- Paying 100% upfront — Never pay the full amount before work is completed. A typical payment schedule is 10% deposit, 40% at mid-point, 50% on completion.
🤔 What-If Scenarios to Explore
Get the most value from this calculator by testing these scenarios:
- What if you skip carpentry (use freestanding furniture instead)? How much do you save?
- What is the cost difference between budget and mid-range for a 1,200 sqft unit?
- Run at least 3 scenarios — best case, base case, and worst case — to understand the full range of outcomes.
Related Calculators
Your property journey involves many interconnected decisions. These calculators work hand-in-hand with this one:
- How to Calculate total acquisition cost
- How to Use the End-to-End Investment Calculator
- How to Calculate Buy-to-Live ROI
Ready to Crunch Your Numbers?
Enter your unit size and explore renovation costs by category. Share the results with your contractor and use it as a benchmark during negotiations.
This how-to guide is auto-generated using ShiokNest's calculator defaults. All worked examples use default values — adjust inputs to match your personal scenario for accurate results.
Renovation cost breakdown by category (as of 2026-06)
The figures below are indicative market ranges based on typical Singapore residential projects. They are illustrative starting points — you must obtain actual quotes because costs vary by material grade, floor area, site complexity, and contractor workload.
1. Hacking and demolition — S$2,000–S$12,000
Covers the removal of existing floor tiles, wall tiles, false ceilings, built-in carpentry, and non-structural partition walls. BTO owners typically spend S$0–S$2,000 (minor preparation only). Resale owners with full-flat hacking can reach S$10,000–S$12,000 depending on tile layers and total area. This work requires HDB permit approval for HDB flats.
2. Masonry and flooring — S$8,000–S$25,000
Includes new floor tiles or engineered timber/vinyl planks, bathroom wall tiles, and any feature wall tiling. Material grade is the primary variable: basic homogeneous tiles cost S$3–S$6 per square foot supplied-and-laid, while large-format marble or Italian porcelain can reach S$18–S$30 per square foot. A 4-room HDB (approximately 90 sqm) tiled throughout mid-range falls in the S$12,000–S$18,000 band.
3. Carpentry — S$15,000–S$50,000+ (often the single largest line item)
Custom carpentry — kitchen cabinets, bedroom wardrobes, TV feature walls, study shelving, and bathroom vanities — is consistently the biggest cost driver in Singapore renovations. A full kitchen (upper and lower cabinets, island or peninsula) in laminate finish costs S$8,000–S$18,000. Solid timber or lacquer finishes push the kitchen alone past S$25,000. Two wardrobes add S$5,000–S$12,000. The more bespoke the design, the higher the bill. This is also where ID firms exert the most influence, because their carpentry workshop relationships directly affect lead time and quality control.
4. Plumbing and electrical rewiring — S$3,000–S$15,000
New BTO units need minimal plumbing work (just fixtures and connections) and electrical work limited to adding power points and light fittings — budget S$3,000–S$6,000. Resale units over 15 years old frequently need full electrical board replacement (S$1,500–S$3,000 alone), rewiring of aged conduits, and replacement of corroded plumbing pipes — the total can reach S$12,000–S$15,000. A licensed electrician must certify all electrical work; for HDB flats, this certification is submitted as part of the permit process.
5. False ceiling, plastering, and painting — S$4,000–S$12,000
A full-flat plaster ceiling with recessed lighting in a 4-room HDB typically costs S$6,000–S$9,000 supplied and installed. Painting (walls, doors, trim) for the same unit adds S$2,000–S$4,000. Opting for a direct-paint finish without a false ceiling is a common cost-reduction strategy that saves S$4,000–S$6,000 but limits your lighting design options.
6. Glasswork and doors — S$2,000–S$8,000
Includes frameless glass shower screens (S$800–S$2,000 each), glass panel partitions, and door replacements. Solid-core timber doors cost S$400–S$800 per door supplied and hung. A full-flat door replacement (4-room HDB, typically 6–8 doors) runs S$3,000–S$5,000. Sliding glass panels between living and dining areas add S$2,000–S$5,000 depending on size and glass type.
7. Contingency — always budget 10% of your total
No renovation project in Singapore ends exactly at the quoted price. Hidden water damage behind old tiles, electrical conduits in unexpected locations, and material delivery delays are routine. A 10% contingency on a S$60,000 project is S$6,000 — a modest insurance premium that prevents a cash-flow crisis mid-project.
Indicative total by unit type and condition (as of 2026-06):
- 3-room BTO (new): S$30,000–S$55,000
- 4-room BTO (new): S$40,000–S$70,000
- 5-room BTO (new): S$50,000–S$90,000
- 3-room resale HDB (full reno): S$45,000–S$75,000
- 4-room resale HDB (full reno): S$60,000–S$100,000
- 5-room resale HDB (full reno): S$75,000–S$130,000
- 800 sqft resale condo (full reno): S$60,000–S$110,000
- 1,200 sqft resale condo (full reno): S$80,000–S$150,000+
These are market-derived estimates — always get at least three written quotations and verify each line item. Use the ShiokNest Renovation Cost Calculator and the Total Acquisition Cost Calculator to model your full ownership cash flow before committing to a renovation budget.
Renovation loans are a separate financing facility from your home loan. Banks offer renovation loans up to S$30,000 or six times your monthly income (whichever is lower), at interest rates typically between 3.5% and 5.5% per annum (as of 2026-06). CPF Ordinary Account savings cannot be used to pay for renovation — it must be cash or a renovation loan. This is a common misconception that catches buyers off-guard. For guidance on whether a renovation loan affects your overall debt-servicing ratios, see the MAS Total Debt Servicing Ratio framework.
For HDB-specific cost benchmarks and to understand how renovation spending interacts with your overall property investment, compare districts using the ROI Calculator and review transaction data on the District 3 profile or any district page for context on value retention.
Step by step: how to build your renovation budget
- Establish your hard ceiling before meeting any contractor. Use the Total Acquisition Cost Calculator to compute your total cash outlay including stamp duties, legal fees, and agent commissions. Subtract that from your available funds to determine the maximum you can spend on renovation without straining your reserves. Add in any renovation loan capacity you are willing to use.
- Check your regulatory constraints. HDB flat owners: visit HDB's renovation contractor portal to confirm your contractor is registered, and read the HDB renovation guidelines for your flat type and ethnic integration policy zone. Condo owners: request the MCST by-laws and the building's approved plans from the management office before any design work begins. For structural queries — particularly relevant for landed property — refer to BCA's building works guidelines.
- Inspect the unit before any design consultation. Walk through the unit with a torch. Check for hollow tiles (tap with a coin — a dull thud indicates de-bonding), water stains on ceilings or near plumbing risers, corroded electrical conduits at the distribution board, and signs of past water seepage around windows. Document everything photographically. Items you find now can be included in contractor scope; items discovered mid-renovation become variation orders at a premium.
- Build a scope-of-works document room by room. For each room, list: (a) what you want to keep, (b) what must be demolished, (c) new floor finish, (d) new wall finish, (e) carpentry requirements, (f) lighting and electrical points, and (g) plumbing changes. This document becomes the basis for comparable quotations. Contractors pricing the same scope produce comparable quotes; contractors pricing different scopes produce incomparable quotes.
- Allocate a preliminary budget by trade category using the indicative ranges in the Data section above. Prioritise the categories that matter most to you — many homeowners find that allocating more to carpentry and flooring (the high-visibility, high-use surfaces) and saving on ceilings (direct paint instead of false ceiling) yields the best perceived value for money.
- Collect at least three written quotations from contractors who have visited the unit. Verbal estimates are not useful for comparison. Ask each contractor to quote the same scope of works you have prepared. Compare line by line, not total to total — a low-total quote that omits the hacking or electrical rewiring will balloon once those variation orders appear.
- Run the numbers through the Renovation Cost Calculator to sense-check your allocations, then model the ROI impact using the ROI Calculator — renovation spend that cannot be recovered in a future sale is a lifestyle cost, not an investment, and it is useful to understand that distinction before committing.
- Add your 10% contingency as a non-negotiable line. Place these funds in a dedicated account that you do not touch unless a genuine variation arises. Contractors who tell you a 10% contingency is unnecessary have not done enough renovations.
- Negotiate payment milestones, not a lump sum. A standard structure is: 10–20% upon signing, 30–40% upon commencement, 30% at mid-point, and the final 10–20% only after defect rectification is complete and you have done a final walkthrough. Never pay more than 20–30% upfront to a contractor you have not worked with before.
- Document everything in writing. The signed quotation is your contract. Any change — material upgrade, scope addition, timeline extension — must be captured in a written variation order signed by both parties. A verbal agreement to “just add one more wardrobe” becomes a dispute when the final bill arrives.
Frequently asked questions
Can I use my CPF Ordinary Account savings to pay for renovation?
No. CPF Ordinary Account (OA) funds may only be used for housing-related payments — specifically home loan instalments, the initial down payment, and stamp duties. Renovation costs must be paid in cash or financed through a renovation loan. Banks and licensed moneylenders offer renovation loans up to S$30,000 or six times your monthly income (whichever is lower), typically at 3.5%–5.5% per annum (as of 2026-06). These loans are unsecured and disbursed directly to the licensed contractor upon submission of a signed quotation.
Do I need an HDB renovation permit for every type of work?
Not for every trade, but for most structural and wet work, yes. Under HDB renovation guidelines, a permit is required for hacking of floor and wall tiles, installation of new sanitary fittings, alterations to walls, installation of false ceilings, and any rewiring of electrical circuits. Purely cosmetic work such as repainting, replacing light fittings, or installing flat-pack furniture does not require a permit. Your HDB-registered contractor is responsible for applying for the permit on your behalf — if a contractor tells you a permit is not needed for tile hacking or electrical work in an HDB flat, treat that as a red flag.
Is it cheaper to hire an ID firm or go directly to a main contractor?
A direct main contractor is typically 15–30% cheaper than an ID firm for equivalent work scope and material grades. However, with a direct contractor you take on the project management role yourself — coordinating between the tiler, carpenter, electrician, and plumber, resolving scheduling clashes, and managing quality control across trades. An ID firm charges a premium precisely for handling this coordination, providing design drawings, and offering a single accountability point if defects arise. For first-time renovators managing a full-flat project while working full-time, the ID firm premium is often worth the reduction in stress. For experienced homeowners renovating a second or third property, direct contracting can produce substantial savings.
What happens if I discover hidden damage (water seepage, rotten substrate) after hacking begins?
This is the most common source of renovation budget overruns in resale units. Once existing tiles or wall panels are removed, contractors frequently find de-bonded screed, water-damaged cement board, or corroded embedded conduits that were invisible before demolition. These must be remediated before new finishes are laid — there is no shortcut. The cost depends on the extent: localised water damage to a bathroom wall may add S$500–S$2,000 in remedial screed and waterproofing; widespread water ingress that has damaged the concrete substrate across an entire wet area can add S$5,000–S$10,000. This is precisely why a 10% contingency is non-negotiable for resale purchases. Your pre-renovation inspection (see Step 3 above) should identify high-risk areas so you are not surprised.
How does renovation spending affect the ROI on my property?
Renovation spending generally adds less to resale value than it costs — the return is rarely one-for-one. A S$80,000 renovation on a S$600,000 HDB flat does not automatically produce a S$680,000 resale price; buyers form their own view of the value of your specific finishes. High-quality flooring, functional kitchen carpentry, and a clean electrical installation tend to add the most perceived value because buyers can see and use them. Bespoke feature walls and niche design choices may appeal to some buyers and actively put off others. The ROI Calculator allows you to model different renovation spend levels against projected resale values so you can make this trade-off explicit before committing. As a general rule, renovation to a good standard in line with the neighbourhood's expectations is rational; renovation that significantly exceeds the neighbourhood ceiling is a lifestyle choice, not a financial one.