Weiken Interior Design leads this list for 4-room HDB renovations because it handles the full package from design to HDB paperwork under one contract. Absolook Interior Design is a strong runner-up for owners who want a design-led approach with custom carpentry. The Orange Cube is the third pick, ideal for owners who want a consistent design direction carried through the whole flat.
How we picked this list
Our shortlist came from desk research across public sources, checking each firm’s website to confirm it resolves and the business is trading. We ranked them on the criteria below, focusing on HDB-specific experience and transparent contracting. No placement on this list is paid.
Table of Contents
- How we picked this list
- Table of Contents
- Intro
- Quick Picks
- Comparison Table
- 1. Weiken Interior Design
- 2. Absolook Interior Design
- 3. The Orange Cube
- 4. Design 4 Space
- 5. Ciseern by Design
- 6. Fyner Interior
- 7. Mega Carpentry
- 8. Sky Creation
- 9. Rezt & Relax Interior
- 10. Fifth Avenue Interior
- How to Choose
- FAQ
Intro
Many homeowners assume any contractor can renovate a 4-room HDB flat. That is wrong. HDB has specific rules on hacking, floor loading and common area protection that a firm working mostly on condos may not handle well. You are trying to find a firm that understands these constraints, not just one that can build shelves. The search is hard because many firms look similar online, but their approach to HDB permits, site coordination and defects varies widely. I compiled this list to help you cut through the noise and focus on firms that have actually delivered on 4-room layouts.
Quick Picks
Choose Weiken Interior Design if you want a single firm to handle design, HDB paperwork and site coordination. Choose Absolook Interior Design on a tighter budget if you want a design-led package with carpentry made to fit. Choose The Orange Cube for a specific design direction carried through the whole flat.
Comparison Table
| Business | Best for | Price band | Area |
|---|---|---|---|
| Weiken Interior Design | 4-room BTO and resale owners who want a single firm to handle design, HDB paperwork and site coordination | Not stated | Not stated |
| Absolook Interior Design | Homeowners who want a design-led package with carpentry made to fit the flat | Not stated | Not stated |
| The Orange Cube | Owners who want a specific design direction carried through the whole flat | Not stated | Not stated |
| Design 4 Space | Homeowners comparing a few mid-sized design firms before committing | Not stated | Not stated |
| Ciseern by Design | Owners who want carpentry and design handled by one team | Not stated | Not stated |
| Fyner Interior | BTO owners looking for a package quote on a standard 4-room layout | Not stated | Not stated |
| Mega Carpentry | Owners who already have a main contractor and need carpentry done properly | Not stated | Not stated |
| Sky Creation | Homeowners wanting a design and build package from one company | Not stated | Not stated |
| Rezt & Relax Interior | Owners who want a package covering design, carpentry and general works | Not stated | Not stated |
| Fifth Avenue Interior | Homeowners shortlisting design firms for a full flat renovation | Not stated | Not stated |
If you are also looking at Home Renovation services beyond the flat itself, or need help with Best Kitchen Cabinet Makers in Singapore, those resources can complement your main renovation contract.
The List
1. Weiken Interior Design

Weiken Interior Design has a long-running presence in the HDB renovation market. It handles a full flat package rather than carpentry only, covering design, carpentry, tiling, plumbing and electrical works under one contract. This makes it a strong fit for 4-room BTO and resale owners who want to avoid juggling multiple trades.
- What’s good
- Long-running presence in the HDB renovation market
- Handles a full flat package rather than carpentry only
- Works across BTO, resale and condo layouts
- What to watch
- Confirm which project manager and site supervisor will run your job
- Ask for a line by line quote that states exclusions such as electrical and aircon
- Check whether the designer you meet is the person managing the site daily
Who it suits: 4-room BTO and resale owners who want a single firm to handle design, HDB paperwork and site coordination. If you only need carpentry, look elsewhere.
Price: Not stated
Details: Weiken Interior Design, weiken.com
2. Absolook Interior Design

Absolook Interior Design takes a design-heavy approach rather than a plain build contract. It has experience with standard 4-room HDB layouts and their constraints, and its portfolio spans both HDB and private property. This makes it a good option for homeowners who want design and carpentry to work together.
- What’s good
- Design-heavy approach rather than a plain build contract
- Experience with standard 4-room HDB layouts and their constraints
- Portfolio spanning both HDB and private property
- What to watch
- Ask how much of the carpentry is produced in-house and how much is subcontracted
- Get the quotation to list what is excluded
- Confirm the warranty period in writing before signing
Who it suits: Homeowners who want a design-led package with carpentry made to fit the flat. If you need a pure build contract, look elsewhere.
Price: Not stated
Details: Absolook Interior Design, absolook.com
3. The Orange Cube

The Orange Cube has a recognisable design style across its portfolio. It handles full home renovation, not partial works, and serves both HDB and condo owners. This makes it a good fit for owners who want a consistent design direction carried through the whole flat.
- What’s good
- Recognisable design style across its portfolio
- Handles full home renovation, not partial works
- Serves both HDB and condo owners
- What to watch
- Confirm the current showroom location and opening hours before visiting
- Check whether design fees are separate from the renovation contract
- Ask who is responsible for defects after handover
Who it suits: Owners who want a specific design direction carried through the whole flat. If you need a partial renovation, look elsewhere.
Price: Not stated
Details: The Orange Cube, orangecube.co
4. Design 4 Space

Design 4 Space focuses on residential properties in Singapore, including HDB flats. It is a good option for homeowners comparing a few mid-sized design firms before committing. The firm has a residential focus and works with HDB layouts.
- What’s good
- Residential focus
- Works with HDB layouts
- What to watch
- Confirm the exact trading name and registration before signing anything
- Ask for recent 4-room HDB projects, not just condo work
- Get the payment schedule in writing
Who it suits: Homeowners comparing a few mid-sized design firms before committing. If you need a specialist trade, look elsewhere.
Price: Not stated
Details: Design 4 Space, 4space.com
5. Ciseern by Design

Ciseern by Design handles interior design and renovation for residential homes in Singapore. It covers carpentry, flooring and general building works, and it is a good fit for owners who want carpentry and design handled by one team.
- What’s good
- Residential renovation focus
- Carpentry and design under one contract
- What to watch
- Verify current company status and registration
- Ask for the names of the project manager and site supervisor
- Confirm the warranty terms in the contract
Who it suits: Owners who want carpentry and design handled by one team. If you need a design-led approach, look elsewhere.
Price: Not stated
Details: Ciseern by Design, ciseern.com
6. Fyner Interior

Fyner Interior serves the HDB and BTO segment and offers full home renovation packages. It is a good fit for BTO owners looking for a package quote on a standard 4-room layout.
- What’s good
- Serves the HDB and BTO segment
- Offers full home renovation packages
- What to watch
- Confirm the firm is still trading under this name
- Ask what happens if the assigned designer leaves mid-project
- Check the deposit amount against the rest of the payment schedule
Who it suits: BTO owners looking for a package quote on a standard 4-room layout. If you need a design-led approach, look elsewhere.
Price: Not stated
Details: Fyner Interior, fyner.com
7. Mega Carpentry

Mega Carpentry is carpentry-focused, handling built-in wardrobes, kitchen cabinets and feature walls. It often works alongside a main contractor, which makes it a good fit for owners who already have a main contractor and need carpentry done properly.
- What’s good
- Carpentry-led rather than design-led
- Can work as a specialist trade under another contractor
- What to watch
- Clarify who handles site coordination if the firm is only doing carpentry
- Ask for a workshop visit or photos of past installations
- Confirm measurement and installation dates in writing
Who it suits: Owners who already have a main contractor and need carpentry done properly. If you need a full package, look elsewhere.
Price: Not stated
Details: Mega Carpentry, mega.com.sg
8. Sky Creation

Sky Creation offers interior design and renovation services for residential properties, including HDB flats and condominiums. It is a good fit for homeowners wanting a design and build package from one company.
- What’s good
- Full service design and renovation
- Residential project portfolio
- What to watch
- Confirm current company details and registration
- Ask how many projects the assigned site supervisor runs at once
- Get the quotation to spell out what is not included
Who it suits: Homeowners wanting a design and build package from one company. If you need a specialist trade, look elsewhere.
Price: Not stated
Details: Sky Creation, skycreation.net
9. Rezt & Relax Interior

Rezt & Relax Interior offers interior design and renovation for HDB flats and private homes in Singapore. It is a good fit for owners who want a package covering design, carpentry and general works.
- What’s good
- HDB renovation experience
- Full package offering
- What to watch
- Verify the trading name and company registration
- Ask for owner references from completed 4-room projects
- Check the defect rectification process after handover
Who it suits: Owners who want a package covering design, carpentry and general works. If you need a design-led approach, look elsewhere.
Price: Not stated
Details: Rezt & Relax Interior
10. Fifth Avenue Interior

Fifth Avenue Interior offers interior design and renovation services for residential properties in Singapore. It is a good fit for homeowners shortlisting design firms for a full flat renovation.
- What’s good
- Residential design focus
- What to watch
- Confirm the firm is still operating and under what name
- Ask whether it carries out works directly or subcontracts everything
- Get every promise into the signed contract
Who it suits: Homeowners shortlisting design firms for a full flat renovation. If you need a specialist trade, look elsewhere.
Price: Not stated
Details: Fifth Avenue Interior, fifthavenue.com.sg
How to Choose
| Criterion | Why It Matters | What Good Looks Like |
|---|---|---|
| HDB Registered Renovation Contractor (RRC) status | Certain HDB renovation works, including hacking of walls, floor screeding and cement tiling, have to be carried out by a contractor registered under HDB’s scheme, and that contractor submits the permit application on your behalf. A firm that is not registered cannot take your job through to approval. | The firm can show a current RRC registration number, and it covers the exact scope of works you need, not just painting and carpentry. |
| CaseTrust accreditation | Accredited renovation businesses commit to clearer contracts and deposit handling. That matters when you are paying a deposit months before any works start. | A current CaseTrust certificate that you can check against the CaseTrust directory, not a logo on a brochure. |
| Itemised quotation with stated exclusions | Renovation budgets go wrong on the items nobody wrote down. Electrical points, aircon trunking, window grilles, haulage and debris removal are common gaps. | Line by line pricing for carpentry, tiling, plumbing, electrical and painting, plus a written list of exclusions and who supplies what. |
| Completed 4-room HDB projects you can actually see | HDB works carry rules on hacking, floor loading and protection of common areas that a firm working mostly on condos may not handle well. | Photos or a viewing of finished 4-room projects, and at least two past owners willing to take a call. |
| Who runs your site | The designer who closes the sale is often not the person managing the site day to day. Mismatch here is behind a large share of renovation complaints. | Names of the project manager and site supervisor, how many concurrent projects each handles, and who you call when something goes wrong. |
| Payment schedule tied to milestones | A large upfront deposit leaves you exposed if the firm slows down or stops work partway. | Payments split across demolition, carpentry installation and handover, with a retention sum held back until defects are fixed. |
| Written warranty and defect response | Carpentry and waterproofing defects often appear months after handover, once the final payment has cleared. | Warranty length stated in the contract, what it covers, and a stated response time for defect call backs. |
If you are also looking at HDB specific renovation tips, or need help with Best Electrical Panel Upgrade Contractors in Singapore for HDB, those resources can help you navigate the technical side of your renovation.
FAQ
How much does a 4-room HDB renovation cost in Singapore?
A 4-room HDB renovation in Singapore typically costs between SGD 30,000 and SGD 60,000, depending on the scope of works, materials and design complexity. This range covers hacking, carpentry, tiling, plumbing, electrical and painting. If you add custom joinery, smart home features or high-end finishes, the cost can go higher. Always get a line by line quote to see where your budget is going.
How long does a 4-room HDB renovation take from hacking to handover?
A 4-room HDB renovation typically takes between 3 and 6 months from hacking to handover. This timeline includes waiting for HDB permit approval, which can take 2 to 4 weeks. The actual works, including hacking, carpentry, tiling and painting, usually take 8 to 12 weeks. Delays can happen if there are changes to the design or if trades are hard to source.
Do I need an HDB Registered Renovation Contractor, or can any contractor hack my wall?
Yes, you need an HDB Registered Renovation Contractor for certain works, including hacking of walls, floor screeding and cement tiling. These works have to be carried out by a contractor registered under HDB’s scheme, and that contractor submits the permit application on your behalf. A firm that is not registered cannot take your job through to approval. Check that the firm can show a current RRC registration number that covers the exact scope of works you need.
Should I hire an interior designer or go straight to a renovation contractor?
It depends on your needs. If you want a design-led approach with custom carpentry and a consistent design direction, hire an interior designer. If you have a clear plan and just need someone to execute it, a renovation contractor may be enough. Many firms offer both design and build services, which can simplify the process. Ask whether the designer you meet is the person managing the site daily.
Can I use CPF to pay for my renovation, and how much deposit is normal?
Yes, you can use CPF to pay for your renovation, but there are limits. You can use your Ordinary Account to pay for renovation works, up to a certain amount. The deposit is usually 10% to 20% of the total contract value, but it should be tied to milestones. Check that the payment schedule is split across demolition, carpentry installation and handover, with a retention sum held back until defects are fixed.




