Office Fit Out Cost UK: 2026 Guide to Quotes, Timelines and Red Flags

Office Fit Out Cost UK searches usually start when a lease has been signed, a team has outgrown its space, or an empty unit needs turning into a practical workplace. The right contractor can make the project feel controlled; the wrong one can leave you with delays, disputed extras and a workplace that still does not function properly.

This guide explains typical office fit out costs in the UK for 2026, what should be included in a quote, how long work may take, and the red flags to check before appointing a provider. It is written for small businesses, landlords and operations managers who need a clear decision framework before comparing local fit out companies.

What affects office fit out cost in the UK?

The biggest cost driver is the starting condition of the space. A serviced office that only needs decoration, furniture and minor electrical changes is very different from a bare shell with no ceilings, lighting, partitions or mechanical systems. The quote should state whether the project is Cat A, Cat A plus, Cat B or a refurbishment of an occupied workspace.

Size matters, but layout complexity often matters more. Open-plan areas are usually cheaper per square foot than cellular offices, boardrooms, kitchens and acoustic pods. Costs also rise when work must happen outside normal hours, in a city-centre building with difficult access, or in a managed block with strict lift, noise and permit rules.

• Specification: standard finishes cost less than bespoke joinery, feature lighting and high-end flooring.
• Services: HVAC, power, data, fire alarms and plumbing can be a major share of the budget.
• Compliance: building control, accessibility, fire stopping and emergency lighting must not be ignored.
• Programme: fast-track deadlines often need more labour, longer hours and tighter project management.

How much should you budget for different fit out levels?

A light office refresh may include redecoration, new carpet tiles, furniture changes, branding and small electrical alterations. This can be suitable when the layout already works and the services are in good condition. For many businesses, this is the lowest-risk way to improve a workspace without a full strip-out.

A mid-range Cat B fit out is more involved. It may include partitioning, meeting rooms, tea points, breakout areas, lighting changes, data cabling, upgraded flooring, furniture, signage and decoration. This is where detailed scope comparison becomes essential because two quotes with the same headline price can include very different allowances.

Higher-end fit outs usually involve more design time, specialist trades and bespoke elements. Examples include acoustic treatment for call-heavy teams, client suites, podcast or recording rooms, laboratory-style workspaces, hospitality finishes or integrated smart-office systems. In these cases, insist on a clear schedule of finishes and a change-control process before work starts.

What should an office fit out quote include?

A reliable quote should be more than a one-page total. It should break down the project so you can see what is included, what is provisional and what is excluded. If the quote is vague, you are more likely to face arguments about extras once the job is underway.

Core items to check

• Design, surveys, drawings and space planning responsibilities.
• Strip-out, waste disposal and protection of common areas.
• Partitions, ceilings, doors, flooring, decoration and finishes.
• Electrical work, data cabling, lighting, emergency lighting and certificates.
• Mechanical work such as ventilation, air conditioning and plumbing.
• Fire alarms, fire stopping, signage and compliance documentation.
• Furniture, fixtures, appliances, storage and delivery costs.
• Project management, site supervision, snagging and handover pack.

Ask whether prices are fixed, estimated or based on provisional sums. Provisional sums are not automatically bad, but they need realistic allowances and written assumptions. If several important items are marked “by others”, identify who is responsible before signing.

How long does an office fit out take?

Small refresh projects can sometimes be completed in one to three weeks after materials are ready. A moderate Cat B fit out may take four to ten weeks on site, while larger or technically complex projects can take several months from survey to handover. The pre-construction stage is often underestimated, especially when approvals are needed.

Before setting a move-in date, allow time for design decisions, landlord consent, building management permits, long-lead furniture, data provider appointments and any building control inspections. If your current lease, staff return date or client launch depends on the project, ask the contractor for a programme with milestones rather than a broad completion promise.

Which red flags suggest a risky contractor?

Most fit out problems are visible before work starts if you know what to look for. Be cautious if a contractor pressures you to sign quickly, refuses to provide an itemised quote, or dismisses compliance questions as unnecessary. A low price can be attractive, but it may simply mean key items are missing.

• No evidence of similar commercial projects or recent references.
• Unclear insurance, health and safety arrangements or site supervision.
• Large upfront payment request with no staged payment schedule.
• No written process for variations, delays or snagging.
• Reluctance to discuss fire safety, access, electrical certification or landlord rules.
• Quote excludes too many essentials, such as waste, certificates or making good.

For extra confidence, speak to previous clients and ask what happened after handover. Good contractors are usually transparent about snagging, because minor snags are normal; unmanaged snags are the problem.

How can you compare office fit out companies fairly?

Prepare the same brief for each provider. Include floor plans if available, headcount, meeting room needs, storage requirements, IT expectations, brand requirements, access constraints and desired completion date. The more consistent the brief, the easier it is to compare quotes on value rather than guesswork.

Do not choose on price alone. Compare experience, communication, programme realism, design quality, compliance knowledge and aftercare. A slightly higher quote from a contractor who has spotted building constraints can be better value than a cheaper quote that discovers them later.

• Ask each company to explain assumptions in plain English.
• Request a schedule of rates for likely changes.
• Check whether they use employees, subcontractors or a mix.
• Confirm who will be your day-to-day contact once work starts.

FAQ

Is an office fit out tax deductible?

Some costs may qualify as business expenses or capital allowances, but treatment depends on the item and your circumstances. Ask your accountant before committing, especially for furniture, plant, electrical systems and leasehold improvements.

Do I need landlord approval for an office fit out?

Usually yes. Many leases require a licence to alter before changes to partitions, services, flooring, signage or common areas. Start this process early because it can affect both timeline and specification.

Should I use a design and build contractor?

Design and build can simplify responsibility because one provider manages design, pricing and delivery. It still needs a clear brief, transparent allowances and documented approvals so you know exactly what is being delivered.

Next step: compare trusted local providers

If you are planning an office move, refurbishment or workspace upgrade, use Real People Media to compare trusted local businesses, check service providers and shortlist office fit out companies with relevant UK experience. A careful comparison before you sign can save money, reduce disruption and help your team move into a workspace that is ready to use.