Interior design fees depend on project scope, the studio’s experience, location, and the depth of service you need—from concept-only work to full implementation. Most studios structure costs around their process stages: Discovery, Concept, Design & Specification, Commission, and Reveal. Your budget should reflect the complexity of the space, the calibre of materials and craftspeople involved, and the time required to deliver a considered interior that endures.
Why interior design isn’t a fixed price
Interior design fees vary because every project is genuinely different. A commercial dental practice—such as Beaulieu Dental Practice—involves different constraints, timelines, and regulatory considerations than a residential apartment or a hair salon. The studio’s fee reflects the scope of work, the number of spaces involved, the complexity of the brief, and the level of custom detail required.
Location matters. A London project like the London Embankment Apartment or Tone at Canary Wharf typically involves higher supplier costs, faster timelines, and access to specialist trades that differ from projects in towns like Witham. The studio adjusts its investment accordingly.
The depth of service also determines cost. Some clients need only concept direction; others require full Concept, Design & Specification, material selection, supplier management, and site supervision through to Reveal. A partial brief costs less than a comprehensive one—but it also delivers a proportionally narrower outcome.
What are the main cost structures studios use?
Most interior design studios charge in one of three ways: hourly rates, project fees, or a combination tied to the project’s value. A project fee is clearest for clients because it covers the entire journey from Discovery through Reveal at an agreed sum. This works well when the scope is well-defined and the studio can forecast its time accurately.
Hourly billing suits smaller, undefined work—a single room consultation or a revision phase. Time-plus-materials is common in commercial fit-outs where specifications and supplier involvement increase partway through the work.
The most transparent approach is phase-based pricing, where each stage of the process—Discovery, Concept, Design & Specification, Commission, and Reveal—has its own fee or payment schedule. This lets you understand what each stage costs and decide whether to proceed before committing to the full project. It also reflects the real rhythm of professional interior design work.
What happens in each project stage, and why it affects cost
Discovery is where the studio listens, measures, researches your brief, and builds the strategic foundation. This stage is short but essential; rushing it creates expensive mistakes later. The studio audits your space, understands your constraints and vision, and produces a clear brief document.
Concept is where ideas are tested and refined. The studio develops a visual and strategic direction—spatial moves, material palettes, light and proportion studies. This stage clarifies whether the vision is achievable within your real constraints. Concept work is iterative; the fee reflects the number of options explored and refined.
Concept, Design & Specification is the longest and most detailed stage. The studio produces technical drawings, material schedules, finishes, joinery details, and supplier specifications. Every element is documented so that tradespeople and suppliers can cost accurately and work to a consistent standard. This stage is where quality is locked in; it requires significant expertise and time.
Commission is the implementation phase. The studio manages orders, coordinates deliveries, briefs contractors, and oversees installation. For complex projects like Tone at Canary Wharf or Fruittii Hair Salon, this stage demands active site management and problem-solving.
Reveal is the final handover and walkthrough. The studio ensures everything meets specification, resolves snagging, and hands over the finished interior. This stage is brief but critical for ensuring the interior performs as intended.
How project type affects what you’ll pay
Commercial projects often cost differently than residential ones. A salon or dental practice involves specialist fit-outs—bespoke cabinetry, plumbing, electrics, and compliance—that require more technical specification and site coordination than a residential apartment. Keystones Estate Agent, Fruittii Hair Salon, and Beaulieu Dental Practice all required different trade expertise and compliance oversight.
Residential projects like the Witham Project or London Embankment Apartment can be equally complex, but the timeline is often more flexible and the brief more personal. This allows the studio to think longer-term about material longevity and the way the interior will age and be lived in.
A single-room refresh costs less than a whole-property overhaul, but the studio’s process remains rigorous. Whether it’s a full interior or a focused intervention, the quality of thinking and specification doesn’t change—the scope and fee scale accordingly.
What questions to ask before you agree to a fee
Ask whether the fee includes all five stages or only some of them. Some studios charge separately for Discovery, or exclude Commission and Reveal. Understanding what’s included is essential; a low fee for Concept alone is not comparable to a fee that covers Concept, Design & Specification and site supervision.
Ask what happens if your brief changes mid-project. Most studios have a process for change orders; clarify this before you start. Scope creep is expensive; a clear brief and approval process protect both you and the studio.
Ask for a breakdown of timing. How long will each stage take? When do you need to make decisions? Are there dependent costs—such as specialist contractors or custom making—that you’ll need to budget for separately?
Ask whether the fee covers site visits and revision rounds. The studio’s investment in visiting your space and managing revisions should be explicit. Don’t assume unlimited revisions are included; most studios define the number of revision rounds within a stage fee.
The long-term value of a considered interior
A well-designed interior costs more upfront because it’s made to last. Cheap finishes, poor spatial planning, and rushed specification create interiors that fail functionally or visually within a few years. A considered interior—one where materials, proportions, and details are chosen for durability and timelessness—performs well for a decade or more.
Interior design is not a commodity. The studio’s fee reflects the expertise required to make a space work well, the time spent on detailed specification, and the accountability taken for the outcome. When you pay for a professional interior designer, you’re paying for restraint, clarity of thinking, and a refusal to let poor decisions pass. That restraint and judgment is what makes an interior feel considered rather than decorated.
Before you brief a studio, be clear about your own priorities. Are you looking for concept direction only, or do you need the studio to manage the entire delivery? Are you prepared to invest in quality materials and specialist making, or are you working with a tight material budget? The studio’s fee should reflect your real brief, not a theoretical one.