When you ask this question at a renovation fair, every salesperson at every booth will give you a different number.
The honest answer is: it depends on five things that most people haven’t thought through yet.
The baseline by flat type
Here’s a realistic renovation range for 2025, covering everything from hacking, carpentry, bathrooms, kitchen work, and flooring.
Estimated full renovation cost
- 2-room BTO flat — $25,000 to $40,000
- 3-room BTO flat — $35,000 to $55,000
- 4-room BTO flat — $45,000 to $75,000
- 5-room BTO flat — $55,000 to $90,000
- Resale 4-room (older, more work needed) — $60,000 to $100,000
- Condo 2-bedroom — $50,000 to $90,000
These estimates assume a complete renovation, including:
- New flooring throughout
- Both bathrooms fully renovated
- Kitchen cabinets and countertop replacement
- Bedroom carpentry
- General hacking and rebuilding works
If you're doing essential-only renovation on a tighter budget, you can usually reduce this by 30–40%.
What drives the cost up most
Carpentry
Carpentry is usually the largest cost variable.
A full 4-room renovation with extensive built-ins such as:
- Master wardrobe
- Kids’ wardrobe
- Kitchen cabinets
- TV console
- Study desk
- Shoe cabinet
can easily cost $25,000 to $35,000 on carpentry alone.
The smart move is to choose your battles — not every room needs custom built-ins.
Bathrooms
Bathrooms cost far more than most homeowners expect.
A proper bathroom redo with:
- New wall and floor tiles
- New fittings
- Shower screen
- Vanity
- Waterproofing works
typically costs $6,000 to $10,000 per bathroom.
Trying to save money on waterproofing often leads to seepage issues and much larger repair bills later.
Hacking vs overlay
For resale flats with older tiles, choosing overlay instead of hacking can save:
- $3,000 to $6,000
- Around two weeks of renovation time
This can be one of the best cost-saving decisions if the existing tile condition still allows it.
The hidden costs that no one quotes
Your contractor’s quotation is almost never the final number.
Based on common homeowner experience, prepare an additional $6,000 to $10,000 buffer for hidden costs such as:
- Disposal of renovation debris
- Floor and wall protection materials
- Additional electrical power points
- Window grilles and door grilles
- Aircon installation
- Temporary accommodation during renovation
These are often discovered gradually through WhatsApp updates during the renovation process.
Budget for them from day one.
The renovation loan math
CPF Ordinary Account funds can sometimes be used for renovation, but usually with conditions.
Because of this, many homeowners choose a bank renovation loan.
Typical rates are:
- 3% to 4% flat rate
- Equivalent to around 5.5% to 7% EIR
For example:
A $50,000 loan over 5 years may cost roughly $8,000 to $10,000 in interest.
This is not cheap financing.
Avoid over-renovating simply because financing is available.
The difference between “full” and “right”
The most expensive renovation is not always the best renovation.
A $90,000 renovation with:
- No clear design direction
- Too many feature walls
- Trendy Instagram-driven materials
- Overdecorated details
can start looking dated within just a few years.
Meanwhile, a $55,000 renovation with:
- Clean design choices
- Quality flooring
- Durable carpentry hardware
- Reliable bathroom fittings
- Smart restraint in less important areas
can feel luxurious and still age beautifully after 10–15 years.
The goal is not just to spend more.
The goal is to spend smart.
The bottom line
A 4-room BTO full renovation in Singapore will realistically cost around:
- $55,000 to $75,000 all-in
once hidden extras are included.
For a 4-room resale, a more realistic budget is:
- $70,000 to $90,000
These are not horror stories.
They are simply realistic numbers.
Plan for the real figure, not just the quotation.
Homeowners who get blindsided are usually the ones who planned around the quote but forgot to plan around reality.
