How Much Does a Gym Fit Out Cost in the UK? (2026 Guide)

If you’re planning to open a gym or refurbish an existing fitness facility, the fit out is likely to be your single largest upfront investment. But how much should you actually budget? The honest answer is: it depends — but this guide will give you real numbers, explain what drives the cost, and help you plan a project that delivers on time and on budget.

At Design Business Interiors, we’ve delivered over 150 large-scale gym and leisure fit outs across the UK, working with national operators including JD Gyms, NRG Gyms, Lifestyle Fitness, and Simply Gym. Here’s what we know from experience.

Gym fit out cost: the headline figures

Gym fit out costs in the UK typically range from £50,000 to over £500,000, with most commercial gym projects landing somewhere between £100,000 and £350,000 depending on size and specification.

On a per-square-foot basis, you can expect to pay:

• Basic functional fit out: £30–£55 per sq ft — stripped back, functional, budget gym feel
• Mid-range commercial fit out: £55–£90 per sq ft — solid finishes, branded environment, good member experience
• Premium health club fit out: £90–£150+ per sq ft — high-spec materials, bespoke joinery, premium lighting and flooring

These figures cover construction and fit out work. Equipment costs are separate and can add a further £50,000 to £200,000+ depending on the size of your gym floor and the kit you choose.

What’s included in a gym fit out?

A full Cat B gym fit out — the kind Design Business Interiors specialises in — covers everything from bare shell to ready-to-open. The key cost components are:

Structural and building work

Depending on the condition of the building, you may need floor reinforcement to handle the load of heavy free weights and cardio machines. This can cost between £5,000 and £20,000. Mezzanine installation for a spin studio or functional training area adds further cost.

Mechanical and electrical (M&E)

Gyms have high electrical demands — treadmills, bikes, TVs, lighting, ventilation, and air conditioning all draw significant power. M&E works typically account for 25–35% of the total fit out cost. Adequate ventilation is especially important; inadequate airflow is one of the most common complaints from gym members.

Changing rooms and wet areas

Showers, toilets, lockers, and changing areas are among the most expensive elements per square foot due to waterproofing, tiling, and plumbing requirements. Budget between £10,000 and £40,000 for a mid-size changing facility, more for premium finishes.

Flooring

Commercial gym flooring needs to be durable, safe, and appropriate for the zone — rubber matting for free weights, sprung flooring for studios, hard-wearing vinyl or polished concrete for cardio zones. Flooring typically costs £8–£25 per sq ft installed.

Branding, signage, and feature walls

For franchise operators like JD Gyms or independent operators building a strong brand, interior branding — wall graphics, LED signage, feature lighting rigs — plays a major role in the member experience. Budget £5,000–£30,000 depending on scope.

Key factors that affect your gym fit out cost

Building condition (Cat A vs shell and core)

The most significant variable is the starting condition of your space. A Cat A space (already fitted with basic M&E, suspended ceilings, and raised floors) will cost considerably less to fit out than a raw shell or a former retail unit that needs full services installed from scratch.

Size of the gym

Most commercial gym operators target spaces of 5,000 to 20,000 square feet. Larger spaces generally achieve a better cost per square foot as fixed overheads like design, project management, and scaffolding get spread more thinly.

Location

Labour costs vary significantly across the UK. London and the South East attract a 20–30% premium over the North West and Midlands. At Design Business Interiors, based in Wigan, we have strong local supply chain relationships that allow us to deliver exceptional value for operators in the North of England — while also serving clients nationwide.

Specification level

Budget gyms prioritise function and efficiency. Premium health clubs invest in materials, acoustics, lighting design, and bespoke joinery that elevates the member experience and justifies higher membership pricing. Be clear about your positioning before committing to a specification.

Typical gym fit out budget breakdown

For a mid-range 8,000 sq ft commercial gym fit out, here’s a rough allocation of costs:

• Structural / building works: £20,000–£40,000
• Mechanical and electrical: £40,000–£70,000
• Changing rooms and wet areas: £25,000–£50,000
• Flooring: £15,000–£30,000
• Partitions, ceilings, and internal finishes: £20,000–£35,000
• Branding, signage, and feature elements: £10,000–£25,000
• Design, project management, and fees: £15,000–£30,000
• Total (excluding equipment): £145,000–£280,000

How to control your gym fit out costs

The best way to keep costs under control is to appoint a design and build contractor rather than managing separate architects, engineers, and contractors yourself. A single turnkey contractor — like Design Business Interiors — carries full responsibility for design, specification, cost control, and delivery, eliminating the costly miscommunications that arise between separate parties.

We also hold buying relationships with the UK’s leading gym flooring, partition, and M&E suppliers, allowing us to pass on better pricing than you’d achieve working independently.

Get a free gym fit out cost estimate

If you have a gym project in mind — whether it’s a new build fit out or a refurbishment of an existing facility — we’d be happy to provide a free initial consultation and indicative cost estimate. With over 150 gym projects completed for some of the UK’s largest operators, we understand what it takes to deliver a brilliant gym on time and within budget.

Contact the Design Business Interiors team today to discuss your project.