Interior Design Fees in Singapore: What Landed Owners Pay For

Interior design fees in Singapore can be charged as a fixed amount, a percentage of project value, an area-based rate or part of a design-and-build package. For a landed home, the useful question is what the appointment includes across every floor, room and project stage. A small headline fee tells you little without that scope.

Separate the designer’s services from the contractor’s works and any specialist appointments. Our landed interior design and renovation cost guide provides the wider budget context, while this guide focuses on the service you are buying.

What Current Published Fee Guidance Shows

DDA’s 2026 luxury design guide describes percentage fees of 12%–18% of construction value for full-scope luxury work, alongside other charging models. This is one firm’s published guidance for that segment, not a standard tariff or a Yang’s fee schedule.

The practical lesson is to compare like-for-like appointments. A concept package, detailed interior design service and appointment covering construction-stage coordination are different products. Ask each firm to identify the stages covered before applying any published percentage to your house.

Comparing Interior Design Fees in Singapore

Fixed Fees

A fixed fee can make budgeting straightforward when the brief is well defined. The agreement should name the spaces, drawing stages, revision rounds and site involvement. Check what happens if you add an attic room or change an approved layout midway through the design process.

Ask for a schedule of deliverables tied to payment stages. Concept plans and visualisations help you approve the direction, but construction may require more detailed drawings. Confirm whether joinery details, lighting coordination and material schedules are part of the same appointment.

Percentage Fees

A percentage needs a defined calculation base. Ask whether the percentage applies to the original construction estimate, the awarded contract or the final account after variations. Also clarify the treatment of taxes, owner-supplied items and work purchased separately.

For illustration only, 10% of a hypothetical S$300,000 fee base is S$30,000. If the agreed base rises to S$360,000, the same formula produces S$36,000. These numbers demonstrate the mechanism; they are not market rates or a proposed Yang’s charge.

Per-Square-Foot Fees

An area-based fee must state which area is measured. Land area, internal floor area and the total area being designed are not interchangeable. Ask whether balconies, terraces, voids, service rooms and external spaces enter the calculation.

A larger floor area can also conceal uneven complexity. Designing several bathrooms and a detailed wet kitchen involves a different workload from a similar-sized room with limited built-ins. Request a description of the design scope alongside the area calculation.

Identify What the Service Actually Covers

Start with five stages: brief development, concept design, detailed documentation, procurement support and construction-stage coordination. Mark each as included, optional or excluded. Then identify who makes decisions and who checks that drawings from different parties agree.

Site attendance needs particular clarity. A stated number of visits is not the same as continuous supervision, contract administration or specialist inspection. Ask who answers site queries, records decisions and reviews proposed substitutions when the original material becomes unavailable.

For landed projects, ask how interior design interfaces with architectural and engineering appointments. BCA explains that required building-plan submissions are made through a Qualified Person. Establish responsibility early rather than assuming every professional service sits inside the interior design fee.

Understand Design-and-Build Bundles and Fee Offsets

A bundled package may combine design services and construction in one proposal. Request a clear account of the promised design deliverables even when the invoice does not show a separate design fee. Compare the complete scope, finish specifications and exclusions across competing proposals.

If a fee is offset against later works, record the amount, qualifying contract value and conditions. Ask whether the credit applies in full, whether it expires and what happens if you proceed with only part of the renovation. A verbal promise is difficult to budget around.

Also clarify your right to use the drawings if you do not award the construction package. Do not assume that paying for initial concepts includes editable files or permission for another contractor to build from them. The appointment should settle those questions before work begins.

Test Value Against a Real Landed Brief

Bring a list of daily problems instead of only reference photographs. Explain how people move between storeys, where storage fails and which rooms need privacy. Ask the designer to describe the deliverables that will resolve those problems.

Yang’s lists The Timber Veil, a semi-detached project, in its portfolio. A relevant completed project gives you a starting point for discussing multi-storey coordination; ask which services formed part of that particular appointment rather than inferring its fee from the photographs.

Use the guide to choosing a landed interior design firm to assess fit, then review the proposed payment schedule and variation arrangements. Price and accountability need to be considered together.

Compare Two Appointments Using a Deliverables Matrix

Imagine that one proposal includes concept plans and visualisations, while another includes detailed joinery drawings and construction-stage coordination as well. Their fee totals cannot explain the difference by themselves. Write the agreed deliverables down the left side of a comparison sheet and mark what each proposal supplies.

Include the practical outputs your landed brief needs: layouts for every affected storey, room elevations where required, material selections and a record of unresolved interfaces. Ask when each item will be issued and what the household must approve. This also helps you understand whether the proposed design programme allows enough time for decisions.

Then compare the service after the drawings are issued. Who answers a contractor’s query about a cabinet junction? Who records an agreed substitution? A clear answer identifies the responsible person and the limits of their appointment, rather than promising general support throughout the renovation.

Finally, test a realistic change against both proposals. Ask how the fee would change if you added a guest bathroom or requested another layout option after approval. You do not need to predict every future decision, but you should understand the charging method before a change becomes urgent.

Keep the accepted matrix with the appointment letter. It provides a shared reference when you review progress and avoids judging the service only by the number of attractive renderings received. The value lies in whether the agreed work supports decisions and execution across the whole home.

Request an Appointment You Can Compare

Send shortlisted firms the same property information, room list and intended scope. Ask for named deliverables, exclusions, revision limits and construction-stage responsibilities. Keep optional services separate so you can see what each extra appointment contributes.

Choose the proposal that makes the service and its boundaries understandable. Discuss a design brief and fee proposal for your landed home with Yang’s Inspiration Design.

Frequently Asked Questions

Is the Design Fee the Total Renovation Cost?

Usually they describe different things. A separate design fee pays for the services listed in the appointment, while construction pays for materials and building work. Some firms bundle both. Read the inclusions carefully and identify consultant appointments, owner purchases and taxes that may sit outside the package.

Is a Fixed Fee Better Than a Percentage Fee?

Neither is automatically better. A fixed fee needs a clear scope and change procedure, while a percentage fee needs an agreed calculation base. Compare the deliverables, responsibilities and likely effect of changes. The most useful arrangement is one you can understand before committing to the appointment.

Does Free Design Mean There Is No Design Cost?

A package may include design without a separately charged fee, but you should still assess the complete contract price and service. Ask which drawings, revisions and site visits are included. Confirm any conditions requiring you to award construction before deciding whether the package offers value.

Can I Take the Drawings to Another Contractor?

That depends on your agreement with the designer. Confirm drawing-use rights, permitted construction use, access to editable files and any additional charges before appointment. Also check whether another contractor would need further details or coordination work before using those drawings for an accurate construction quotation.