Photography: Richard Waite
There is no useful single price for interior design because the phrase can describe a furnished living room or a whole house under construction. Cost becomes clearer once the scope and categories are separated.
The cost of working with an interior designer depends on the scale of the property and the scope of the service. A furnishing scheme for several completed rooms cannot be compared directly with a whole-home renovation involving planning, joinery, lighting, procurement and installation.
For that reason, a single average figure is rarely useful. A clearer answer begins by separating professional fees from the money spent on the house and its contents.
Professional design fees
Design fees pay for the work required to understand, develop, document and coordinate the interior. Depending on the project, this may include briefing, site visits, plans, presentations, drawings, specifications, sourcing, meetings with consultants, revisions and responses during construction.
The proposal should explain how fees are calculated and what they cover. Some work may be fixed by stage and some charged on time or connected to purchasing. Beyond the total fee, the relevant question is whether the listed service includes the decisions you expect the designer to manage.
Construction and specialist work
Building work sits outside the design fee. It may include demolition, building, electrical, plumbing, cabinetry, stone, decorative finishes and specialist installation. The architect and other consultants will have their own fees.
An interior designer can help define and document the intended work, but the construction price depends on the site and the delivery team. Early coordination allows the design and cost plan to develop together rather than treating the completed design as something to price only at the end.
Furnishings and lighting
The furnishing budget can include furniture, rugs, decorative lighting, window treatments, upholstery, art and objects. The range is broad because the mix may include existing pieces, vintage finds, readily available products and work made specifically for the house.
I prefer to allocate by room and importance rather than assume every item belongs at the same price level. A principal sofa used every day may warrant a different investment from an occasional side table. One exceptional piece can give authority to a room while quieter pieces support it.
Bespoke furniture is introduced only where it resolves a particular need. The number and type vary substantially by project, so it should not be treated as a fixed allowance attached to every whole-home commission.
Procurement and installation
The price of an item is not always the complete cost of putting it in the room. Freight, customs where applicable, receiving, storage, delivery, specialist handling, art installation and final placement may need separate allowances.
Sourcing and project coordination also involves professional work: obtaining quotations, placing and tracking orders, coordinating makers and following issues through. These responsibilities should be clear in the proposal rather than assumed to be included because a product has been selected.
Scope decides cost
Cost is affected by the number of rooms, the degree of construction, the amount of custom work and how far the service continues after design approval. A project that includes every room and final installation carries more work and product than a concept for selected spaces.
A narrow scope is not automatically better value. Designing rooms independently over several years can create incompatible decisions and repeated mobilisation. A whole-home plan may be developed once even if purchasing or construction is staged.
The full-service residential interior design article explains the stages that may sit within a complete commission. The fee proposal should show which of them apply to your project.
Budget needs to include uncertainty
Existing houses can reveal conditions after work begins, and freight and supplier pricing can change. A client may choose to improve a material or add work once the design is understood. The budget therefore needs a sensible allowance for unresolved information and change.
The studio provides clear reporting and a live budget tracker so approved expenditure remains visible. A tracker cannot prevent every change, but it allows the effect of a change to be understood before it is absorbed unnoticed.
Ask for clarity before comparing proposals
When comparing interior designers, check whether the proposals describe the same service. One may continue through procurement and installation while another ends at concept presentation. A lower fee can represent a narrower responsibility rather than the same work at a lower price.
Ask what is excluded, how revisions are handled, who purchases goods, how site involvement is charged and what happens if the programme changes. The answers make the true cost more legible.
A useful budget connects ambition with timing. The previous article explains how long a whole-home project takes; time and cost often move together because both reflect the amount of work being asked of the project.
If you would like a proposal for a defined residential brief, contact the studio with the property and the stage the project has reached.