Hiring the right interior designer (ID) can mean the difference between a dream home and a renovation nightmare. In Singapore, the interior design industry is largely unregulated — anyone can call themselves a designer without formal qualifications. That makes due diligence critical before you sign a contract and hand over tens of thousands of dollars.
This guide covers what to look for in an ID firm, accreditation schemes, key questions to ask, red flags to avoid, how contracts and payments should work, and what to do if things go wrong.
Related tools & guides: Use our Renovation Cost Calculator to set a realistic budget before engaging designers. For what you can and can’t do in a condo, see the Condo Renovation Rules Guide.
Accreditation & Certification
While no licence is legally required to operate as an interior designer in Singapore, several accreditation schemes help you separate credible firms from fly-by-night operators:
- CaseTrust Accreditation — administered by the Consumers Association of Singapore (CASE). CaseTrust-accredited firms must maintain a customer deposit management scheme, provide standardised contracts, and submit to mediation for disputes. This is the single most important credential to look for.
- HDB-licensed renovator — required for HDB flats; not mandatory for private condos but indicates the firm meets government standards for insurance, workmanship, and safety
- BCA-registered contractor — required for structural works; look for this if your renovation involves hacking load-bearing walls or major structural modifications
- SIDS membership — the Society of Interior Designers Singapore is a professional body; membership indicates the designer has formal qualifications
Key Questions to Ask Every ID Firm
Portfolio & Experience
- Can I see completed projects similar to mine in size and style?
- Do you have experience with condominiums specifically (vs. HDB or landed)?
- Can I visit a recently completed project or speak to a past client?
- How many projects do you handle simultaneously?
Process & Timeline
- What is your design process from first meeting to handover?
- How long will the renovation take? What is the buffer for delays?
- Who will be my day-to-day contact — the designer or a project manager?
- How often will I receive progress updates?
Costs & Payment
- Is the quotation lump-sum or itemised? (Always insist on itemised)
- What is included and what is excluded? Are there provisional sums?
- What is the payment schedule? (Should be progressive, tied to milestones)
- Is there a design fee separate from the renovation contract?
- How are variation orders (changes after contract signing) priced?
Warranty & After-Sales
- What warranty do you provide? (Industry standard: 1–2 years on workmanship, 5–10 years on carpentry)
- What is the defect rectification process during the warranty period?
- What happens if the firm closes during the warranty period? (CaseTrust firms have deposit protection)
Red Flags to Watch For
- No written contract — any firm that wants to start work on a handshake deal should be rejected immediately
- Full upfront payment — never pay more than 10% as a deposit; progressive payments tied to milestones are the norm
- No physical showroom or office — while not mandatory, firms with a permanent space are less likely to disappear
- Pressure to sign quickly — “this price is only valid today” is a classic high-pressure tactic; reputable firms give you time to compare
- Vague quotation — lump-sum quotes without itemisation make it impossible to compare firms or identify what you’re paying for
- No portfolio or references — even new firms should have at least rendered designs or student projects; zero portfolio means zero track record
- Subcontracting everything — some firms are brokers, not builders; they subcontract all work and add markup with no quality control
- No insurance — ask for proof of public liability and workmen’s compensation insurance
Understanding a Renovation Quotation
A proper quotation should be itemised by work category. Here is a typical structure:
| Category | Typical Range (3-bed condo) | What’s Included |
|---|---|---|
| Hacking & disposal | S$3,000–S$8,000 | Demolition of walls, tiles, built-ins; debris removal |
| Masonry & tiling | S$8,000–S$20,000 | Wall/floor tiling, waterproofing, screeding |
| Carpentry | S$15,000–S$40,000 | Kitchen cabinets, wardrobes, shoe cabinets, TV console, feature walls |
| Plumbing | S$2,000–S$6,000 | Pipe relocation, fixture installation, water heater |
| Electrical | S$3,000–S$8,000 | Rewiring, new points, DB box upgrade, lighting |
| Painting | S$2,000–S$5,000 | Walls and ceiling; primer + 2 coats emulsion |
| Glass & aluminium | S$2,000–S$8,000 | Shower screens, mirrors, sliding doors |
| Design fee | S$0–S$5,000 | Some firms absorb this; others charge 5–15% of contract |
Total for a full 3-bedroom condo renovation typically ranges from S$50,000 to S$100,000 depending on finish level and scope. Luxury finishes can push this to S$150,000+.
Payment Norms & Progressive Schedule
The industry-standard payment schedule for renovation in Singapore:
- 10% upon contract signing — secures your slot; never pay more than this upfront
- 20% upon commencement of hacking/demolition
- 25% upon completion of masonry and tiling
- 25% upon completion of carpentry installation
- 15% upon completion of painting and final inspection
- 5% retention — withheld for 2–4 weeks after handover to cover defect rectification
CaseTrust-accredited firms are required to offer a progressive payment schedule. If a firm asks for 50% upfront, walk away.
When Things Go Wrong — Dispute Resolution
If you encounter quality issues, delays, or contract breaches:
- Document everything — photos, WhatsApp messages, emails, and a dated written complaint to the firm
- Refer to the contract — check the dispute resolution clause; most contracts specify mediation before legal action
- CASE mediation — the Consumers Association of Singapore offers mediation services for renovation disputes, especially for CaseTrust-accredited firms
- Small Claims Tribunal — for disputes up to S$20,000 (or S$30,000 if both parties agree); no lawyer needed
- State Courts — for disputes exceeding Small Claims limits; legal representation advisable
Prevention is better than cure: The single best way to avoid disputes is to insist on a detailed, itemised contract with a progressive payment schedule. Never pay the full amount before work is complete.
ID Firm Comparison Checklist
When shortlisting 2–3 firms, compare them on these criteria:
| Criterion | What to Check |
|---|---|
| CaseTrust accredited | Verify on CASE website |
| Years in business | ACRA business profile (S$5.50 on BizFile) |
| Portfolio relevance | Completed projects similar to your unit type |
| Client references | At least 2 contactable past clients |
| Quotation detail | Itemised by category with unit rates |
| Payment schedule | Progressive, max 10% upfront |
| Warranty | Written warranty on workmanship + materials |
| Insurance | Public liability + workmen’s compensation |
| Communication | Responsiveness during quotation stage |
| Online reviews | Google, Qanvast, Hometrust, RenoTalk |
Ready to budget? Use our Renovation Cost Calculator to estimate your project cost before meeting designers. For condo-specific rules on what renovations require MCST approval, see our Condo Renovation Rules Guide.