Interior Design Fees Explained: Singapore Cost Guide

“How much does interior design cost?” and “how much does renovation cost?” tend to get asked as if they are the same question. They are not. Renovation cost is the physical work — hacking, carpentry, tiling, plumbing. The design fee is separate: what you are paying for the thinking, drawings, and project oversight that shapes how that renovation money gets spent. Here is how design fees are actually structured in Singapore, and what commonly hides inside, or outside, of them.

The Five Ways Designers Charge in Singapore

1. Fixed design fee: roughly S$1,500–S$15,000+ depending on property type and scope — the most transparent model, since it is agreed upfront and kept separate from construction cost.
2. Percentage of renovation cost: commonly 5–10% for standard HDB or condo work, scaling up to 12–18% for full-scope luxury projects. This aligns the designer’s incentive with your total spend, though it is worth asking how that incentive is managed in practice.
3. Package or “free design”: design is bundled into the renovation package and effectively recovered through markups on materials and labour, commonly in the 15–45% range — not actually free, just not itemised separately.
4. Hourly or per-visit consultation: roughly S$150–S$500 per hour, suited to targeted advice rather than full project management.
5. Per-square-foot: roughly S$3–S$15 per sq ft — predictable to calculate, though it does not always reflect how complex a particular space actually is.

What a Design Fee Should Cover

At minimum: design consultation and space planning, concept development and mood boards, 3D visualisation, detailed drawings — floor plans, elevations, carpentry blueprints for contractors to build from — and project management or site supervision through to handover.

Ask explicitly which of these are included before comparing two quotes side by side; a “cheaper” design fee that excludes site supervision is not actually cheaper once you account for the time you will spend coordinating trades yourself.

The Costs That Often Hide Outside the Headline Number

Even with a clearly stated design fee, several extras are commonly left out of the initial quote: permit and submission fees for HDB, BCA or MCST (roughly S$300–S$1,500), procurement handling fees on client-supplied items (typically 10–15%), additional site visits beyond what is included (S$150–S$300 each), and post-handover adjustment visits.

None of these are unreasonable to charge — the problem is when they are not disclosed upfront. Ask for all of these to be itemised in your contract, rather than assumed. They also sit outside your total renovation budget, separate from design fees.

Is It Worth Paying a Design Fee At All?

For a straightforward refresh — repainting, swapping flooring, no layout change — a direct contractor with basic rendering is often enough, and skipping a separate design fee makes sense. That is really a question of whether you need a designer at all.

For anything involving layout changes, custom carpentry, or a specific design direction across multiple rooms, the design fee is what prevents costly rework: a modest design fee that catches a single planning mistake early — a wardrobe door that cannot fully open, a fridge that does not fit its nook — has often paid for itself before the first construction bill arrives. There are also questions to ask about fees before you commit.

Ace’s Design’s design fee is disclosed upfront as part of an itemised quotation — covering space planning, 3D visualisation, drawings, and full project supervision through to handover, with no bundled markups hidden inside your material costs. Request a transparent quotation to see exactly what is included.