One of the first questions any business asks when planning a new workspace is: how much does an office fit out cost? It is a fair question, but the answer is rarely straightforward. Costs vary enormously depending on the type of fit out, the condition of the building, the specification you are working to, and how well the project is coordinated from the outset.
In this guide, we break down office fit out cost by category, explain what drives pricing up or down, and outline how to avoid the budget mistakes that catch many businesses off guard. Whether you are relocating to a new unit or refurbishing an existing space, this should give you a realistic picture of what to expect.
Understanding Cat A and Cat B Fit Outs
Before we talk numbers, it is important to understand the two main categories of office fit out, because each carries very different cost implications.
A Category A (Cat A) fit out covers the base build elements of a commercial space. This typically includes raised access flooring, suspended ceilings, basic mechanical and electrical (M&E) services, fire detection and suppression systems, and basic lighting. Cat A work brings a shell space up to a standard where it is ready for a tenant to move in and configure to their needs. In many cases, the landlord covers Cat A costs as part of the lease agreement, though this is not always the case.
A Category B (Cat B) fit out is where the space becomes a functioning workplace. This includes internal partitioning, meeting rooms, kitchen and breakout areas, reception design, branding, furniture, AV systems, and the detailed M&E distribution to suit your specific layout. Cat B is almost always the tenant’s responsibility and is where the bulk of your office fit out cost will sit.
If you are unsure which type of commercial fit out applies to your situation, it is worth getting professional advice early. The distinction affects everything from your budget to your programme.
Office Fit Out Cost Ranges Per Square Foot
As a general guide, here are the typical cost ranges you can expect in the North West of England. These are broad figures and will vary depending on specification, building condition, and project complexity.
Cat A fit out: Typically falls between £35 and £65 per square foot. This covers the base build services, ceilings, flooring, and basic M&E. If the existing building is in reasonable condition and services are accessible, costs will sit at the lower end. Older buildings with poor infrastructure push costs higher.
Cat B fit out (standard specification): For a straightforward office layout with decent finishes, standard furniture, and sensible M&E distribution, expect to pay between £50 and £90 per square foot. This would include partitioned offices, open plan areas, a kitchen, and basic meeting rooms.
Cat B fit out (high specification): If you are looking at premium finishes, bespoke joinery, high end AV and collaboration technology, feature lighting, and detailed branding throughout, costs can range from £90 to £150 per square foot or more. Corporate headquarters, client facing spaces, and businesses in sectors like law, finance, or tech often fall into this bracket.
These figures cover construction and installation costs. They do not typically include professional fees (architects, project managers, M&E consultants), furniture procurement, IT infrastructure, or landlord contributions, all of which need to be factored into your total budget.
What Affects Office Fit Out Pricing
Understanding what drives the office fit out cost helps you make informed decisions about where to spend and where to save. Here are the main factors.
Building condition: The state of the existing building has a major impact. A modern shell with good access to services, solid floors, and a clean ceiling void is far cheaper to fit out than a 1970s office block with asbestos in the ceiling tiles, outdated wiring, and poor structural condition. If the building needs significant remedial work before the fit out can begin, this adds cost and time. In some cases, dilapidations obligations from the previous tenant may mean the space has been stripped back to shell, which can actually work in your favour if done properly.
Mechanical and electrical services: M&E is typically the single largest cost element in any office fit out. Heating, ventilation, air conditioning, electrical distribution, data cabling, fire alarms, and lighting all fall under this heading. The complexity of your layout, the number of meeting rooms and enclosed spaces, and the performance requirements of your HVAC system all influence cost. Older buildings with undersized or outdated electrical supplies may need upgrades at the mains, which adds a further layer of expense.
Finishes and materials: The specification of flooring, wall finishes, ceiling systems, and door hardware all affect the bottom line. Carpet tiles and painted plasterboard are far cheaper than engineered timber flooring and glass partitioning. There is nothing wrong with a practical, mid range specification, and in many cases it delivers better long term value than premium finishes that look impressive but wear poorly.
Furniture and fittings: Desking, seating, storage, and soft furnishings can account for 15 to 25 per cent of the total project cost. There is a wide range available, from budget task chairs at £150 each to ergonomic models at £800 or more. Bespoke reception desks and commercial joinery elements such as built in storage, feature walls, and kitchen units add further cost but can make a significant difference to the finished result.
Technology and AV: Modern offices increasingly rely on integrated AV systems for meeting rooms, video conferencing, digital signage, and collaboration tools. A basic screen and soundbar setup costs a fraction of a fully integrated system with ceiling microphones, automated cameras, and room booking panels. Technology budgets often get underestimated, so it is worth scoping this properly at the start.
Sequencing and Programme
The order in which work is carried out matters more than many people realise. A well planned programme reduces waste, avoids clashes between trades, and keeps the project on track. Poor sequencing leads to delays, rework, and increased costs.
A typical office fit out programme runs as follows. First, any strip out or demolition work is completed. Then the primary M&E services are installed, first fix, within the ceiling void and floor void. Partitioning goes up next, followed by secondary M&E (second fix), such as light fittings, power outlets, and data points. Decoration, flooring, and joinery follow, with furniture installation and snagging at the end.
The programme duration depends on the size of the project. A small office of 2,000 to 3,000 square feet might take six to eight weeks on site. A larger project of 10,000 square feet or more could take 12 to 16 weeks. Design, procurement, and planning typically add another four to eight weeks before work starts on site.
Coordination between the design team, the main contractor, and specialist subcontractors is critical. When one trade is delayed, it has a knock on effect on everything that follows. This is why working with an experienced contractor who manages the full programme makes a real difference to the outcome.
Common Budget Mistakes
Having managed hundreds of commercial fit out projects, we see the same budgeting mistakes come up time and again. Here are the most common ones.
Not allowing for professional fees: Architect, M&E consultant, and project management fees typically add 10 to 15 per cent on top of construction costs. These are not optional extras. Good design and coordination save money in the long run.
Underestimating M&E costs: Businesses often focus on the visible elements, the finishes, the furniture, the branding, and underestimate the cost of the services that make the building work. M&E routinely accounts for 35 to 45 per cent of the total office fit out cost, and skimping on it causes problems for years.
Ignoring dilapidations obligations: If you are leaving an existing space, you may have dilapidations liabilities under your lease. If you are moving into a space where the previous tenant has done a poor strip out, you may inherit problems. Either way, these costs need to be accounted for.
No contingency: Every fit out project should carry a contingency of 5 to 10 per cent of the construction budget. Unexpected issues always arise, whether it is discovering asbestos, finding that the existing drainage does not meet current regulations, or dealing with supply chain delays. A contingency is not a sign of poor planning. It is a sign of realistic planning.
Choosing on price alone: The cheapest quote is rarely the best value. A contractor who has underpriced the job will either cut corners, issue variations throughout the project, or struggle to complete on time. Look at track record, approach to programme management, and quality of previous work alongside the price.
How to Get an Accurate Quote
To get a meaningful quote for your office fit out cost, you need to provide clear information. At a minimum, a contractor will need to know the size of the space, the current condition, the type of fit out required, and the level of specification you are working to.
Ideally, you will have a set of drawings or at least a layout plan, along with a specification or schedule of works. If you do not have these, an experienced contractor can carry out a site survey and work with you to develop a brief and budget estimate.
Be wary of quotes that seem unusually low. Ask what is included and, more importantly, what is excluded. Provisional sums and allowances can mask real costs. A detailed, transparent breakdown is always better than a single lump sum figure with no supporting information.
Why Coordination Matters
An office fit out involves multiple trades working in a confined space to a tight programme. Electricians, mechanical engineers, partition installers, decorators, joiners, flooring contractors, AV installers, and furniture teams all need to work in sequence, and in some cases simultaneously, without getting in each other’s way.
When coordination is poor, the result is delays, damage to completed work, miscommunication, and additional cost. When it is done well, the project flows smoothly from start to finish and the client moves in on time, on budget, and without drama.
This is why choosing a contractor with genuine experience in managing commercial fit outs matters. It is not just about the physical work. It is about planning, communication, problem solving, and delivering a finished space that works for your business.
The total office fit out cost for a typical commercial space in the North West will depend on all of the factors outlined above. There is no single answer, but with the right advice and a realistic approach to budgeting, you can achieve a workspace that meets your needs without unnecessary expense.
If you are planning an office fit out and want to understand the costs involved, get in touch with Ashbarn Construction. We will visit your site, discuss your requirements, and provide a clear, detailed quote with no hidden surprises.
