It is the first question almost everyone asks, and the one no honest studio answers with a single number. Here is how interior design pricing actually works — what you are paying for, what moves the figure up and down, and why the studios worth commissioning give you a costed proposal rather than a price list.
Why there is no price list
An interior design commission is not a product with a shelf price. Two houses of identical size can carry completely different briefs — one a light refresh of three rooms, the other a structural reconfiguration of the whole property with bespoke joinery throughout. The work, and therefore the investment, is shaped by the brief and the building, not by square footage. A credible studio will not name a figure before it understands both. What it will give you, before any work begins, is a fully costed proposal: every room, every product, every trade, every line. The full Tone service is built around exactly that discipline.
The three things you are paying for
Design expertise. The thinking is the product — the spatial planning, the concept, the sourcing, and the orchestration of a coherent scheme that works as a whole rather than a collection of nice rooms. It is the part you cannot buy off a shelf, and the part that decides whether the result still feels right in fifteen years.
Procurement and trade access. A working studio brings relationships — with makers, suppliers and specialist contractors — that an individual client cannot assemble alone, along with the trade terms and quality control that come with them. You are buying access to a supply chain as much as a look.
Project management. Someone has to hold the programme, coordinate the trades, protect the budget and catch problems before they become expensive. In a director-led studio that someone is senior and constant, not a rotating junior. It is the least visible line, and often the one that saves the most money.
What moves the figure
Scale is the obvious driver: a single room costs less than a whole-home commission covering reception spaces, kitchen, principal suite, family bedrooms and bathrooms. But three other factors matter just as much.
The condition of the building. A refurbishment or renovation that touches structure, services and finishes is a larger undertaking than a decorative scheme on a sound shell. Period and listed properties carry their own consents and careful working, which the budget has to reflect.
The level of bespoke. Made-to-measure joinery, specified stone, commissioned pieces and fine materials cost more than catalogue equivalents — and are usually the reason a client commissions a studio in the first place. The right answer is a considered mix, agreed with you, not a maximalist default.
How the fees are usually structured
Most considered studios separate three things: a design fee for the expertise and drawings, the procurement of the products and pieces, and the build carried out by contractors. Some present these in fragments, which makes the true total hard to see until it is too late. Tone presents the whole investment as one fully costed proposal, so you understand it before you commit — not in instalments of unwelcome news.
Why a costed proposal protects you
An open-ended estimate transfers all the risk to you: the figure drifts, the extras accumulate, and the final number bears little relation to the first. A fully costed proposal does the opposite. Nothing is presented as a finished design without a guaranteed budget behind it, so the decision you make at the start is the one you live with at the end. It is the single most important thing to look for when you compare studios — covered in how to choose an interior designer.
Where the conversation starts
Tone discusses fee bands openly at the Discovery — the structured first meeting that opens every commission. No figure is hidden, and no commitment is asked for until you have a costed proposal in front of you. The aim is simple: you should know what you are investing in, and why, before you decide to proceed.