5-room BTO renovation and design that puts the extra space to work
A 5-room BTO renovation starts with one question: what is the extra space for? Best Interior Design plans 5-room flats around that answer, builds the carpentry in our own factory in Admiralty, and prices every trade in one itemised quote, so you can see what the flat will cost before work starts.
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- $5,000 if we miss your handover dateThe date goes into your contract once the design is signed off. (An estimate is not a date.)
- From $30,000 for a 5-room BTO, GST includedDesign, factory carpentry and the trades your flat needs, priced line by line.
- Cabinets built in 3 to 5 weeksIn our own factory in Admiralty, while the site works run. (No outside workshop to chase.)
- E0 plywood at a third of the E1 formaldehyde limitIn every cabinet body, as standard. (Not an upgrade you pay extra for.)
What to Do With the Extra Space in a 5-Room BTO
A 5-room BTO gives you more space than a 4-room, and three good uses for it are a study, a guest room or a walk-in wardrobe. Decide early, because a study needs power points and a desk wall, a guest room needs a bed and storage, and a walk-in wardrobe may need a wall hacked.
A study you can close the door on
A desk wall with shelves and closed cabinets for files, power points at desk height and good task lighting, so calls and deadlines stay out of the living room.
A guest room for visiting parents
A platform bed with drawers or a wall bed, a slim wardrobe, and a side table that works as a desk when no one is staying.
A walk-in wardrobe off the master bedroom
Open hanging rails, drawers and a full-length mirror. Joining a room to the master bedroom means hacking a wall, which needs HDB approval before work starts, and HDB's renovation guidelines explain the rules.
5-Room BTO Renovation Ideas, From the Living Room to the Bathrooms
With more floor space, the living and dining area can take a longer TV wall, a display cabinet and a dining table with room to move around it. In the kitchen, plan an oven tower, a long run of wall and base cabinets, and the service yard's washing machine and storage together, so nothing ends up on the counter.
A false ceiling with cove lights suits a large living and dining area, and keeping it to that one space holds the cost down. A new BTO bathroom often needs only a vanity cabinet, a mirror cabinet and a shower screen. If you want new tiles or a different layout, our toilet renovation works run in the same schedule as the rest of the flat.
The 5-Room BTO Renovation Package and What It Covers
Our 5-room BTO renovation package starts from $30,000 with 9% GST included. It covers the design and a 3D preview, carpentry built in our factory in E0 plywood, the trades the flat needs and one project manager, priced line by line in one quote before work starts.
On-time handover, or we pay you $5,000
Your handover date is written into the contract once the design is signed off and the site is measured. Miss it, and the $5,000 comes off what you still owe.
Design and a 3D preview
Of every room, including the space you set aside for a study, guest room or wardrobe.
Carpentry built in our factory
Kitchen wall and base cabinets, wardrobes and a shoe cabinet, with E0 plywood cabinet bodies.
Electrical, painting and a false ceiling
By licensed trade partners we coordinate, in the same itemised quote.
Flooring and doors if needed
If you did not opt into HDB's Optional Component Scheme.
Installation and handover
A joint walkthrough before handover, on the date in your contract.
Every package we offer, side by side, is on our packages and prices page. Weighing a 5-room against a 4-room? Our 4-room BTO design guide shows how the same rooms work in less space.
What Moves a 5-Room Renovation Cost
Carpentry usually moves a 5-room budget more than anything else, because there are more walls to fill: wardrobes in every bedroom, a longer TV wall, maybe a walk-in wardrobe. 2026 cost guides put carpentry at about 28% to 35% of a renovation budget. After that come finishes, the false ceiling, flooring if needed, and any hacking.
- Build wardrobes to the ceiling once, rather than adding cabinets later.
- Save feature finishes such as fluted panels for the TV wall, and keep wardrobe interiors in plain laminate.
- Keep the false ceiling to the living and dining area.
- Leave the bathrooms as HDB built them if they already work for you.
Collecting Your 5-Room Keys: Timeline and Handover Date
From key collection to handover, a 5-room BTO renovation runs in four stages. Your handover date goes into the contract once the design is signed off and the flat is measured, so every stage below is planned back from the day you want to move in, not forward from whenever work happens to start.
Key collection
New flats come with a defects liability period, so check every room and report defects to HDB before any carpentry covers them.
Free site measurement
We measure the flat and confirm the firm itemised quote.
Factory production
Carpentry typically takes 3 to 5 weeks in our factory while trade partners work on site.
Installation and handover
Typically 5 to 10 working days, then a joint walkthrough and handover on the date in your contract.
Your handover date goes into the contract once the design is signed off and the flat is measured. If we miss it, we pay you $5,000, taken off what you still owe at handover, with any balance paid by bank transfer within 7 days. The guarantee terms explain what can move the date, such as a change you ask for, and our guide to BTO renovation packages sets out the full order of works.
Frequently Asked Questions
How Much Does a 5-Room BTO Renovation Cost?
With us, a 5-room BTO renovation package starts from $30,000 with 9% GST included. Carpentry is usually the biggest line, so the final figure depends mostly on how many feet of wardrobes and cabinets you want and the finishes you choose.
Is It Worth Turning a Bedroom Into a Walk-In Wardrobe?
If you have more bedrooms than people, it can be. Joining the room to the master bedroom means hacking a wall, which needs HDB approval first, so we check the plan with you before you decide.
Can the Study Double as a Guest Room?
Yes. A wall bed or a sofa bed beside a desk wall gives you both, as long as the power points and lighting are planned for each use.
Do the Bathrooms in a New BTO Need Renovating?
Often not. A vanity cabinet, a mirror cabinet and a shower screen may be all a new BTO bathroom needs. If you want new tiles or a new layout, toilet renovation works can run in the same schedule as the rest of the flat.
How Long Does a 5-Room BTO Renovation Take?
Carpentry typically takes 3 to 5 weeks in our factory while site works run, and installation typically takes 5 to 10 working days. Hacking a wall for a walk-in wardrobe needs HDB approval first, so allow for that in your plan.
Can I See the Carpentry Before I Sign?
Yes. Once we have your brief, you can visit our factory at Northlink Building, 10 Admiralty Street, and see boards and cabinets being built for other homes.
Send us your floor plan and a few photos of spaces you like.
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