Key takeaway: there is no single fair price for an interior design project. Cost depends on the property, scope, level of detail, professional experience and level of delivery support. Before comparing proposals, make sure they are describing the same service.
This guide is not a substitute for an individual quotation. It helps you ask the questions that explain what you are paying for and which costs may sit outside the base fee. Start by organising your needs in an interior design brief.
What really affects a design fee
Floor area matters, but it is not the only factor. A compact bathroom or kitchen can require more decisions and coordination than a simple large room. The quotation may reflect room count, property condition, service complexity, custom joinery, required visuals, documentation level and timing.
The stage of the investment matters too. A design for a developer-finish apartment and a design for a renovation with existing constraints can require very different work even when the floor area is similar.
Pricing models you may encounter
Interior designers use different models: a fixed project fee, a rate per square metre, a room-based package, a consultation rate or a combination. The model alone does not decide value. What matters is what it includes, where responsibility ends and which extras are charged separately.
Before deciding, ask about revision rules, meeting count, additional rooms, procurement, supervision, travel, documentation updates and VAT where applicable. A meaningful price should relate to a meaningful scope.
What a complete interior design service may include
A comprehensive service often brings together functional planning, visual direction, material selection, visualisations, contractor drawings, product schedules and support during implementation. Not every project needs every element. A single room may need only a consultation and concept; for a whole apartment, lack of technical drawings may later create costly questions on site.
Compare package with package. If one proposal includes lighting, electrical and joinery design while another shows only a concept image, they are not equivalent products.
How the investment budget shapes the design
A designer does not need a perfectly calculated shopping list. They need a realistic boundary for the total investment and an understanding of priorities. That allows them to propose choices that belong in the financial plan instead of designing a version that cannot be delivered.
Keep the design-service budget separate from the renovation, materials, furniture and contingency budgets. The Apartment Renovation Budget Guide explains how those parts work together.
How to avoid overspending
The lowest proposal can be right if you deliberately need a narrower scope. The risk comes when a price seems low because key elements are not described. Instead of asking only “how much does a project cost?”, ask: “what will I receive, what will I not receive and which decisions remain with me?”
Prepare the same brief, send it to selected professionals in the Designer Directory and compare the responses together with their scope. It is the fairest way to decide whether a proposal fits your project.
| Element | Question for the designer | Why check it |
|---|---|---|
| Functional layout | How many options and revisions are included? | The layout underpins later decisions. |
| Documentation | Which drawings will contractors receive? | It affects the number of questions and changes during works. |
| Visualisations | Which rooms and how many views? | They support decisions but do not replace drawings. |
| Procurement | Are product schedules or ordering support included? | It clarifies the real time required from the client. |
| Supervision | What does contact during implementation include? | It prevents confusing supervision with general availability. |
Does a per-square-metre price always mean a complete project?
No. A rate is only a billing method. Check which stages, drawings, visuals and support it includes.
Are visualisations more important than drawings?
They serve different purposes. Visualisations help judge direction, while drawings help contractors deliver the decisions.
Can a consultation be enough?
Yes, for a simple issue or one room. For a larger renovation, assess whether you also need layout work and documentation.
Are materials and furniture included in a design fee?
Usually not as purchase costs. A proposal may include selection, schedules or ordering support, but this should be clarified.
What may be charged separately?
For example, additional revisions, rooms, specialist drawings, travel, supervision or procurement support. Do not assume: ask for a list.
Is it worth sharing the total investment budget?
Yes. It allows the designer to propose choices that do not later require radical reductions in scope or quality.
How do I compare two different proposals?
Turn both into a shared list: scope, deliverables, revisions, timing, communication, extras and exclusions. Compare the price only then.
Does ArchiCompass show designer prices?
Profiles may include a pricing model or indicative level, but a binding cost comes from the individual scope and a discussion of the brief.