Interior Design Costs in London: What to Expect in 2026
Understanding interior design costs in London is one of the first — and most important — steps when planning a home transformation. Whether you are refreshing a single room or undertaking a full property redesign, having a clear picture of what luxury interior design services cost will help you plan with confidence and invest wisely.
At Supremati, we believe that transparency around budgeting is fundamental to a successful design project. In this guide, we share the key factors that shape interior design fees in London and what you can expect at different levels of investment.
How Much Does Interior Design Cost in London?
Interior design costs in London vary widely depending on the scope, complexity, and calibre of the designer you choose to work with. As a general framework, here is what clients can typically expect across different project types.
Per-Room Costs
For a single room redesign — such as a living room, bedroom, or home office — interior design fees in London generally range from £3,000 to £10,000 or more. At the lower end, this might include a fresh scheme with new soft furnishings, paint colours, and lighting updates. At the higher end, expect bespoke joinery, custom furniture sourcing, and a fully coordinated finish with premium materials.
For luxury interior design, where every element is carefully curated and crafted to the highest specification, per-room costs in central London often start from £10,000 and can reach well beyond £25,000, particularly for spaces requiring bespoke architectural detailing, specialist finishes, or heritage-sensitive work.
Per Square Foot Costs
Many London interior designers quote on a per-square-foot basis, particularly for larger residential projects. Typical rates range from £80 to £200 per square foot for a comprehensive design service. High-end and luxury projects — where the scope includes interior architecture, custom millwork, and full project management — can reach £250 to £450 per square foot or higher. These figures generally encompass design fees, project management, and procurement coordination, though the cost of furnishings and construction works is usually additional.
Full Project Costs
For a complete interior design project covering an entire property, costs in London can range from £30,000 for a modest apartment refresh to well over £500,000 for a substantial townhouse or penthouse transformation. Ultra-high-end projects involving period properties, listed buildings, or significant structural changes may exceed seven figures when the full scope of works is taken into account.
What Is Included at Different Price Points?
The level of service and detail you receive depends significantly on the fee structure and the designer’s approach.
Consultation-Level Service (from £500–£2,000)
At the most accessible level, an interior design consultation provides expert advice and direction. This might include a site visit, mood boards, a colour scheme, and a list of recommended suppliers or furniture pieces. The client typically manages sourcing and installation independently.
Mid-Range Full Service (£15,000–£50,000)
A full-service interior design package at this level typically includes detailed concept development, space planning, material and fabric selection, procurement of furniture and fittings, and coordination with contractors. The designer manages the process from initial brief through to final styling, ensuring a cohesive and polished result.
Luxury Full Service (£50,000+)
At the luxury level, the service extends to bespoke interior architecture, custom furniture design, specialist lighting design, and complete design management. Every element is crafted to the client’s exact requirements. Designers at this level often work closely with architects, structural engineers, and specialist artisans to deliver spaces of exceptional quality and individuality. This is the level at which studios like Supremati operate — providing a deeply personal, end-to-end design experience.
Factors That Affect Interior Design Costs in London
Several variables influence how much an interior design project will cost. Understanding these factors helps set realistic expectations from the outset.
Scope of the Project
The single biggest factor is scope. A scheme limited to decorating and furnishing will cost considerably less than one involving reconfiguration of layouts, structural alterations, or bespoke joinery. Projects that span multiple rooms or an entire property naturally carry higher fees, reflecting the additional design time, coordination, and management required.
Location Within London
Location matters — and not just in terms of property values. Design projects in Mayfair, Belgravia, Knightsbridge, and other prime central London postcodes often involve higher contractor rates, more complex access logistics, and elevated expectations for material quality. Properties in these areas may also be subject to stricter planning requirements, adding layers of specialist consultation.
Listed Buildings and Heritage Properties
Working on a listed building or within a conservation area introduces additional complexity and cost. These projects require sensitivity to the building’s historic character, often involving specialist craftsmen, heritage-approved materials, and close liaison with local planning authorities. The design process itself tends to be more iterative, with additional time dedicated to approvals and compliance.
Timeline and Phasing
A compressed timeline typically increases costs, as it may require additional resources, expedited procurement, or overtime for contractors. Conversely, a well-planned project with realistic timelines allows for more competitive sourcing and a smoother design process. Some clients choose to phase their project across multiple stages, which can help manage cash flow while still achieving a cohesive design vision.
Level of Bespoke Detail
The degree of customisation has a direct impact on cost. Off-the-shelf furniture and standard finishes are naturally more affordable than bespoke pieces, custom millwork, or hand-finished surfaces. For clients who value originality and craftsmanship, investing in bespoke design delivers a home that is truly one of a kind — but it requires a budget that reflects the skill and time involved.
How Supremati Approaches Budgeting
At Supremati, we understand that investing in luxury interior design is a significant commitment, and we take a transparent, structured approach to budgeting from the very first conversation.
Our process begins with a thorough understanding of each client’s vision, lifestyle, and priorities. During the initial consultation, we discuss not only aesthetic aspirations but also practical considerations — the condition of the property, any structural or planning challenges, and the desired timeline. This allows us to develop a realistic and comprehensive budget plan that aligns design ambitions with financial expectations.
We operate a three-phase process — Design, Procurement, and Design Management — each with clearly defined deliverables and associated costs. This structure gives our clients full visibility over where their investment is directed at every stage, from concept development and spatial planning through to procurement coordination and on-site installation management.
Our team handles everything from sourcing premium materials and bespoke furniture to coordinating with trusted contractors and specialist suppliers. By managing these relationships directly, we ensure quality control while also securing the best value for our clients.
Whether you are redesigning a single reception room in St John’s Wood or undertaking a full transformation of a Mayfair townhouse, our approach ensures that your budget is managed with the same precision and care that we bring to the design itself.
Ready to Discuss Your Project?
If you are considering an interior design project in London and would like to understand the costs involved, we would be delighted to help. Every project is unique, and the best way to receive an accurate picture of investment is through a personal conversation about your property, your goals, and your vision.
Book a consultation with our team to explore how Supremati can bring your interiors to life — with clarity, creativity, and meticulous attention to every detail.