How much does an office fit out cost in the UK?
If you are planning an office fit out in the UK, the first practical question is usually: how much will it cost? There is no honest single number that fits every project — but there is a clear way to think about it. Cost is driven by how much space you have, what condition it is in, what you need the workplace to do, where it is, and how quickly you need to deliver.
This guide explains how office fit out pricing actually works, why generic “per square foot” figures can mislead, and what to have ready before you ask for a meaningful quote. It is written for people comparing options in the real world — not for a pitch deck.
What “office fit out” usually means in a UK context
In most conversations, “fit out” means turning a landlord’s base building (often after a Cat A shell) into a working environment your team can use — the Cat B layer: partitions, meeting rooms, kitchens, floor and ceiling finishes, power and data to desks, lighting design, furniture, branding, and integration with IT and AV.
Sometimes people use “fit out” to include a lighter refresh (reusing more of what is already there). The label matters less than being explicit about what is in scope, because that is what the price attaches to.
What typically makes up the price
Most fit out costs combine:
- Labour and management — site teams, coordination, quality control, handover.
- Materials and finishes — partitions, floors, ceilings, joinery, ironmongery.
- Mechanical and electrical (M&E) — power, data, lighting circuits, often small power and containment changes to match the layout.
- Specialist packages — fire stopping and testing, acoustics, access control where needed.
- Furniture and fixtures — sometimes bundled, sometimes procured separately (always clarify).
- Compliance and commissioning — making sure what is built is tested and safe to occupy.
The balance shifts dramatically between a cosmetic refresh and a full reconfiguration with new meeting room stock and upgraded services.
Why two projects of the same size can price differently
Floor area is only one input. A 10,000 sq ft floor in a new building with generous services capacity is not the same job as 10,000 sq ft in an older stock building with restricted access, limited out-of-hours working, or services that need upgrading to support your layout.
Location affects availability of trades and logistics. Programme pressure can add out-of-hours costs. Landlord requirements and approvals can add time — and time adds cost. Good estimating captures those constraints early, not as surprises on site.
Why headline “per sq ft” figures are a starting point, not an answer
Benchmarks can help sense-check scale, but they collapse when your brief is specific. A rate that assumes a generic open plan ignores enclosed meeting rooms, enhanced acoustics, workplace kitchens, or the AV and cable infrastructure your business depends on.
The useful approach is to align scope, programme, and budget as one system: decide what must be true for the business, what is negotiable, and what can be phased. That is when numbers become stable enough to take to a board.
What to prepare before you ask for numbers you can rely on
You do not need a final design — but you do need clarity on direction. Helpful inputs include: headcount and growth assumptions, ratio of focus work to collaboration, IT and meeting room needs, any brand or client-facing requirements, and your target move-in window. If you have drawings or a schedule of condition, share them.
With that context, a design and build partner can test options against budget and flag what drives cost most in your building — not in theory.
A practical next step
If you want to move from rough thinking to a number you can discuss internally, a structured calculator can help you model size, location band, and finish level — then sense-check the output with a team that has delivered similar office fit outs in the UK.
Use our fit-out calculator as a starting point, then have a conversation about scope: that is how you move from a range to a plan.
Reliable cost comes from clear scope and honest trade-offs — not from a bigger spreadsheet.
