Interior designer or renovation contractor?
Three different arrangements get called the same thing in Singapore, and they carry different risks. The distinction that matters is not the job title. It is who is accountable when the drawing and the site disagree.
The three arrangements
- Interior designer: designs the space and specifies materials, then appoints or supervises trades on your behalf. You are paying for design judgment and coordination.
- Renovation contractor: carries out construction — hacking, masonry, electrical, plumbing, carpentry, finishing. You are paying for execution against a scope someone else defines.
- Design-and-build: one firm does both. The person who drew it is the same party responsible for building it, so a clash on site is their problem to resolve rather than yours to arbitrate.
Why the distinction matters on site
Renovation problems are rarely design problems or construction problems. They are handover problems — a socket that lands behind a wardrobe, a carpentry run that doesn't clear a beam, a tile setting out nobody confirmed. When design and build sit with different parties, those become a negotiation, and the negotiation happens while you are living out of boxes.
That is the honest argument for a single accountable party, and also the honest argument against it: with one firm doing both, you lose the independent check that a designer supervising a separate contractor provides. Which risk you prefer depends on how much time you can personally give the project.
What to check before either
- HDB registration: for works in an HDB flat, the contractor must be in HDB's Directory of Renovation Contractors. Check the directory yourself rather than taking it on trust.
- Who applies for the permit: in most arrangements the contractor does. Confirm it in writing, along with who pays if the application is rejected.
- Who is on site daily: a named project manager, or nobody. This single answer predicts most outcomes.
- Insurance and deposit: public liability cover, and what protects your deposit if works stop.
- Payment milestones: tied to completed stages, not to dates.
Comparing quotations fairly
A designer's quote and a contractor's quote are usually not comparable as written. One includes design, coordination and supervision; the other assumes someone else provides them. Before comparing totals, make both quotes state the same scope: how many drawings, how many site visits, who coordinates the aircon installer, who handles defects after handover, and what happens to the price when a variation appears.
We set out how we structure that in how we quote, and there is a longer walkthrough in the guide to choosing a contractor.
Where 3dots sits
3dots is design-and-build. We draw the space, quote the works and manage the site, with construction capability through the established building contractor we work with — so the drawings, the build and the handover stay with one accountable team. Design, develop, deliver is the same sequence in the work as it is on the logo.
For most homeowners the practical benefit is a single point of contact and one party accountable for the result. Where an independent designer overseeing a separate contractor genuinely suits a project better, we will tell you.
Common questions
- Is an interior designer more expensive than a contractor?
- Usually the headline number is higher, because it includes design and coordination the contractor's number assumes someone else is doing. Whether the total cost is higher depends on how much your own time is worth and how many variations the project runs into.
- Do I need an interior designer for a BTO?
- No, but you need someone doing the design work. A new flat needs a full layout, storage and electrical plan — if you are confident specifying that yourself, a contractor is enough. If you are not, the cost of design is usually less than the cost of getting the layout wrong.
- Must my renovation contractor be HDB-registered?
- For renovation works in an HDB flat, yes — the contractor must be listed in HDB's Directory of Renovation Contractors, and the renovation permit is applied for under that registration.
- Can I use a designer for drawings and my own contractor to build?
- Yes, and it is a common arrangement. Agree in advance who resolves discrepancies on site and who signs off variations, because that is where this arrangement usually strains.
Still deciding?
Tell us about the flat and what you want done. We’ll say plainly which arrangement suits it.