Interior decorating costs are structured around project scope, material selection, and the complexity of your brief—not fixed hourly rates. Studios typically charge through a combination of design fees, specification costs, and project management, with final expenditure determined by your brief, location, and the finishes you choose. The sections below explain how this works in practice.
How studios structure their fees for decorating work
Interior design studios do not charge a single hourly rate. Instead, fees reflect the depth of work across the studio’s process stages: Discovery, Concept, Concept, Design & Specification, Commission, and Reveal. Each stage carries different resource commitment. Discovery involves site surveys, client briefing, and constraint mapping—essential groundwork that informs every later decision. Concept work develops design direction and spatial strategy. Concept, Design & Specification then produces detailed technical documentation: material schedules, finish specifications, and supplier recommendations. Commission involves overseeing production and procurement. Reveal is the installation and handover. A residential apartment in London or a commercial salon in a town centre will carry different overheads and timelines, which feeds into fee structure.
The studio’s fees typically cover the intellectual and management work—conceptual development, specification accuracy, vendor liaison, and quality assurance. They do not usually include the cost of materials, furniture, labour, or installation itself. Those are separate line items, invoiced by suppliers and contractors you engage. This separation is important: a designer’s fee is their time and expertise; the decorating budget itself is what you spend on paint, fabric, joinery, lighting, and installation. Understanding this distinction prevents confusion when you receive a proposal.
What factors affect the total cost of your project?
Several variables directly influence what you will spend. The physical size of the space is one: a small salon or a single apartment bedroom requires less specification work than a multi-floor commercial premises or a country house. The complexity of the brief matters equally. A refresh of an existing space—repainting, new soft furnishings, updated lighting—costs less than a full refurbishment involving structural changes, custom joinery, or multiple material trades. The studio’s workload scope also plays a role: a project requiring only colour consultation and furniture selection is lighter than one demanding full spatial planning, lighting design, and bespoke finishes.
Material and finish choices are the largest variable. Selecting durable, timeless materials—quality paint, natural textiles, solid wood—typically costs more upfront but reduces replacement cycles. Trend-led finishes or lower-cost alternatives may appear cheaper initially but often require refresh within years. Location also affects cost. A London-based commercial project like Tone at Canary Wharf or the London Embankment Apartment carries higher labour and supply costs than a residential refurbishment in Witham or a salon project outside a major city. Storage, logistics, and local contractor rates all shift. Your timeline is another factor: a compressed schedule may increase costs through expedited procurement or premium labour rates.
How do residential and commercial projects differ in cost structure?
Residential projects and commercial work are priced differently because they carry distinct regulatory, aesthetic, and durability requirements. A residential apartment like the London Embankment Apartment prioritizes personal comfort, longevity of soft furnishings, and finishes that withstand daily domestic use. A commercial salon or dental practice—such as Fruittii Hair Salon or Beaulieu Dental Practice—must meet health and safety standards, accommodate high footfall and cleaning cycles, and project brand consistency. Commercial spaces typically require more robust, cleanable surfaces; specification of materials is tighter; and the design must serve operational function as well as aesthetics.
Commercial projects often involve longer timescales because they require coordination with building contractors, compliance checks, and longer lead times for bespoke joinery or specialist finishes. An estate agent’s office like Keystones Estate Agent must balance visual appeal with durability and ease of maintenance. This specification rigour—identifying materials that perform over years of use and frequent cleaning—requires more detailed upfront work and therefore higher design fees. Residential projects can sometimes move faster and involve more personal choice; commercial work is more consultative with stakeholders and regulatory bodies. Both require the same five process stages, but the depth of specification and coordination differs, which is reflected in cost.
Understanding the difference between design fees and your decorating budget
A common point of confusion: the studio’s design fee and the money you spend on materials are not the same line item. The design fee covers the studio’s work across Discovery, Concept, Concept, Design & Specification, Commission, and Reveal. This is what you pay for strategy, specification accuracy, vendor management, and quality assurance. Your decorating budget is what you allocate for the actual goods and services: paint, wallpaper, fabric, furniture, lighting, joinery, installation labour, and any specialist trades. These are invoiced separately by suppliers and contractors.
This separation means you retain control. The studio recommends materials and suppliers, but you authorize and pay them directly. If you choose a premium upholstery fabric versus a standard alternative, or opt for bespoke joinery rather than off-the-shelf cabinetry, those cost differences sit in your budget, not the studio’s fee. A realistic budget reflects your priorities: how long you want the finishes to last, whether you favour natural or synthetic materials, and how much customization your brief demands. The studio’s role is to help you spend that budget intelligently—selecting suppliers with proven quality, specifying durable finishes, and avoiding costly revisions through clarity at the Concept, Design & Specification stage.
Why detailed specification at the design stage reduces later costs
The Concept, Design & Specification stage is where cost control happens. A thorough specification—detailed drawings, material samples, colour references, finish schedules, and supplier quotes—prevents misunderstandings, rework, and site surprises that inflate costs. When a reupholstered sofa’s frame dimensions are specified precisely, or paint colours are approved against physical samples rather than digital screens, or lighting is calculated for a specific room dimension, installation goes smoothly. Ambiguity at this stage leads to costly changes during Commission or after Reveal.
Studios invest significant time in this stage because it protects your budget. A clear specification document means contractors can quote accurately, suppliers can source correctly, and installation teams know exactly what they are installing. Commercial projects like Beaulieu Dental Practice or residential work like the Witham Project depend on this rigour: a missed dimension, an unspecified finish, or an unclarified colour match can cascade into delays and additional expense. This is why design fees exist: they fund the detailed work that keeps your decorating budget on track. Skipping this stage to save on design costs typically results in much higher material and labour costs later.
How to budget realistically for your interior decorating project
Start by clarifying your brief and timeline with the studio during Discovery. The more detail you provide about your space, your functional needs, and your aesthetic preferences, the more accurate any cost indication will be. Be realistic about your timeline: a compressed schedule will increase costs. Decide what matters most to you—durability, brand consistency, or immediate impact—because this shapes material choices and total spend.
Allocate your decorating budget across material categories: walls (paint, wallpaper, panelling), soft furnishings (upholstery, curtains, cushions), lighting, furniture, and specialist finishes (joinery, flooring, tiles). Within each category, establish priorities: premium finishes in high-use or visible areas, standard finishes elsewhere. Build in a contingency for site discoveries—a wall condition you didn’t anticipate, a supplier discontinuation, or a change in scope. Request the studio’s proposal in writing, clearly separating their design fee from the material and labour costs you will incur. This clarity prevents assumptions and keeps the project aligned with your financial expectations. Remember: the most expensive decorating project is one that requires complete revision because the initial brief was unclear.