The terms get used interchangeably. They shouldn’t be. Office fit-out vs refurbishment is a decision with real financial, operational, and logistical consequences – and getting it wrong costs time, money, and staff goodwill.
This guide cuts through the confusion. We cover the definitions, the cost benchmarks, the sustainability implications, and – crucially – the part nobody else talks about: what happens to your team, your kit, and your operations while the work is underway. That’s where Continuum Green comes in.
Whether you’re an operations director weighing a lease renewal, a facilities manager planning a phased improvement programme, or a business owner considering a full relocation, this guide gives you the framework to make the right call.
Understanding the Core Difference
The confusion is understandable. Both involve contractors, disruption, and a better-looking office at the end. But the starting point – and the scope – are fundamentally different.
What is an office fit-out?
A fit-out transforms an empty or shell space into a working office. You’re starting from scratch, or close to it. The building exists; the workspace doesn’t yet.
Fit-outs are typically triggered by a move into a new building, a new lease, or a developer handing over a bare shell. The work involves installing everything needed for occupation: partitions, flooring, ceilings, lighting, M&E systems, data infrastructure, and furniture. It’s construction-led, not cosmetic.
The FIS Client Guide to Office Fit-Out and Refurbishment – published by the Finishes and Interiors Sector and widely used across the UK industry – describes fit-out as a structured process running from strategic brief through to post-occupancy evaluation, with up to 18 distinct steps. That gives you a sense of the complexity involved.
What is an office refurbishment?
A refurbishment improves an existing, occupied (or recently vacated) workspace. The building services are already in place. You’re upgrading, reconfiguring, or modernising – not building from scratch.
Refurbishments range from a cosmetic refresh (new carpet, fresh paint, updated lighting) to a substantial overhaul involving new layouts, structural changes, and full M&E upgrades. The defining characteristic: the space already functions as an office, and you’re making it function better.
Where the two overlap
Here’s where it gets complicated. A deep refurbishment – one that strips back to the shell, replaces all services, and reconfigures the entire floor plate – is, in practice, almost indistinguishable from a fit-out. The cost, the programme, and the disruption are comparable.
The practical test: Are you moving into a new space, or improving the one you’re already in? That single question usually resolves it. If you’re moving, it’s a fit-out. If you’re staying, it’s a refurbishment.
The Three Types of Office Fit-Out Explained
UK office fit-outs follow a well-established three-tier classification used by the British Council for Offices (BCO) and the wider property industry. Understanding these categories is essential before you budget or brief a contractor.
Shell and core (base build)
This is the developer’s delivery: the structural frame, external envelope, core services (lifts, stairs, main plant), and basic building fabric. There’s no fit-out at all – just a weathertight shell. Tenants taking a shell-and-core lease take on the full cost and scope of fit-out themselves.
Category A fit-out
Cat A is the landlord’s base offering: the space is habitable but generic. Typically includes raised access floors, suspended ceilings, basic mechanical and electrical services (HVAC, fire detection, lighting), and finished but neutral wall and floor surfaces.
It’s move-in ready in the loosest sense – you could technically occupy it – but there are no partitions, no meeting rooms, no branding, and no furniture. Most tenants inherit a Cat A space and immediately commission a Cat B fit-out on top.
The BCO has noted that Cat A installations are frequently stripped out and replaced when a tenant moves in, making them a significant source of avoidable waste. This is a sustainability issue we return to below.
Category B fit-out
Cat B is the occupier-specific layer: everything that makes the space yours. Partitions, meeting rooms, breakout areas, reception, kitchen and welfare facilities, branding, AV and IT infrastructure, furniture, and bespoke joinery. This is the fit-out your people actually experience.
Cat B is where the real cost sits – and where the real decisions are made about culture, collaboration, and how your business works day to day.
When to Choose a Fit-Out Over a Refurbishment
Three scenarios almost always point to a fit-out rather than a refurbishment.
Moving into a new or vacant space
If you’ve signed a new lease – or you’re taking a building that’s been vacated – a fit-out is the only option. There’s nothing to refurbish. You’re building a workplace from scratch, and the quality of that fit-out will define your team’s experience for the next five to ten years.
This is also the point at which our office relocation services become directly relevant. A fit-out in a new building almost always runs in parallel with a relocation from your existing space – and coordinating those two programmes is where projects most commonly go wrong.
Significant growth or headcount change
If your headcount has grown by 30% and your current space simply can’t be reconfigured to accommodate it, no amount of refurbishment will solve the problem. You need more space – which means a move, which means a fit-out.
Similarly, if you’re consolidating multiple sites into one, the receiving location will almost certainly need a full Cat B fit-out to accommodate the merged team and the combined culture.
Brand or culture transformation
Sometimes the decision isn’t about space – it’s about signal. A business that has undergone a merger, a rebrand, or a fundamental shift in how it works (say, from fixed desks to activity-based working) often finds that refurbishing the existing space sends the wrong message. A new space, fitted out to reflect the new identity, is a more powerful statement.
If that’s your situation, speak to our team early. The fit-out programme and the relocation programme need to be planned together from day one.
When to Choose a Refurbishment Over a Fit-Out
Refurbishment is often the smarter, cheaper, and more sustainable choice – if the conditions are right.
Lease renewal without relocation
You’re staying put. Your landlord has agreed a lease renewal. This is the classic refurbishment trigger: you have the time, the certainty of tenure, and the motivation to invest in improving the space you already occupy.
A well-timed refurbishment at lease renewal can also be a negotiating tool – landlords sometimes contribute to fit-out or refurbishment costs as an incentive to retain a tenant. It’s worth exploring before you commit to a budget.
Modernising without moving
Your space works. The location is right, the lease has years to run, and your team doesn’t want to move. But the office looks tired, the layout doesn’t support hybrid working, and the welfare facilities are a decade out of date.
This is a refurbishment. It’s less disruptive than a relocation, typically faster to deliver, and – at the mid-range – significantly cheaper per square metre than a full fit-out. We cover the numbers in the cost section below.
Phased improvement programmes
Not every business can afford to take its entire office out of action for six weeks. A phased refurbishment – floor by floor, zone by zone – allows the work to proceed while the business continues to operate. It takes longer and costs slightly more to manage, but it avoids the need for a full decant.
That said, even phased programmes often require some temporary displacement of teams. Our move planning service is designed exactly for this: mapping which teams move where, when, and for how long, so the programme stays on track and people aren’t left without a desk.
The Hidden Third Option: Relocate and Fit Out Simultaneously
Here’s the scenario that catches organisations off guard. You’ve decided to move. You’ve found a new building. The landlord is handing it over at Cat A. You now have two programmes running in parallel: the fit-out of the new space and the relocation from the old one.
These two programmes are interdependent. The fit-out programme determines when the new space is ready. The relocation programme determines when the old space is vacated. If the fit-out overruns – which it frequently does – the relocation is delayed, and you’re paying rent on two buildings simultaneously.
We see this regularly. It’s one of the most expensive mistakes in commercial property. The solution is a single managed partner who understands both programmes and can coordinate them as one.
Continuum Green provides exactly that. Our commercial relocation service is built around the reality that most office moves involve a fit-out at the destination – and that the two need to be planned as a single, integrated programme. For larger organisations, our headquarters relocation service adds an additional layer of programme management for complex, multi-phase projects.
As we explored in [Movers Office Relocation: The Hidden Costs & How to Avoid Them], the costs that surprise organisations most are rarely the ones on the contractor’s quote – they’re the coordination failures between workstreams.
Cost Comparison: Fit-Out vs. Refurbishment vs. Relocation
Cost is usually the deciding factor. Here are the 2026 UK benchmarks, based on current market data.
Fit-out cost benchmarks (UK 2026)
Category | Typical UK range | London range |
|---|---|---|
Shell and core | Developer-funded | Developer-funded |
Cat A | £35–£70 per sq ft | £45–£70+ per sq ft |
Cat B standard | £60–£95 per sq ft | £75–£140 per sq ft |
Cat B high-spec | £95–£150+ per sq ft | £140–£250+ per sq ft |
Sources: Cushman & Wakefield 2026 Office Fit-Out Cost Guide; Turner & Townsend 2026 benchmarks.
For a 5,000 sq ft office, a standard Cat B fit-out in a regional UK city will typically cost £300,000–£475,000 on construction alone, before furniture, AV/IT, professional fees, and VAT. In central London, the same space could easily reach £700,000–£1.25 million all-in.
These figures assume a Cat A base. If you’re taking a shell-and-core building, add the Cat A cost on top – or negotiate with the landlord to deliver it.
Refurbishment cost benchmarks (UK 2026)
Specification level | Typical UK range |
|---|---|
Light / cosmetic refresh | £250–£500 per m² |
Mid-range refurbishment | £500–£1,000 per m² |
High-end refurbishment | £1,000–£2,000+ per m² |
A mid-range refurbishment of a 500 m² office – new layout, improved lighting, updated welfare facilities, fresh finishes – typically costs £250,000–£500,000. That’s meaningfully cheaper than a full Cat B fit-out of the same space, and it avoids the cost and disruption of a move.
The Knight Frank Landlord Refurbishment Cost Guide (Spring 2026) provides detailed regional benchmarks and is worth reviewing before you brief a contractor.
The true cost of staying vs. moving
The construction cost is only part of the picture. A relocation adds:
Removal and logistics costs: typically £15–£40 per sq ft of office space moved, depending on complexity
Dilapidations: restoring your old space to its original condition, which can run to tens of thousands of pounds
Dual-running rent: if the fit-out overruns, you pay rent on both buildings
Productivity loss: disruption during a move typically costs 10–15% of a team’s output for 4–6 weeks
Asset disposal: furniture and equipment that doesn’t transfer to the new space needs to be managed – ideally through a furniture management or furniture reuse programme rather than landfill
When you add these costs to the fit-out budget, staying and refurbishing often looks more attractive than the headline numbers suggest. The decision should be made on total cost of change, not just construction cost.
As we detailed in [Office Relocation Companies: Why Continuum Green Stands Out], the organisations that manage this best are the ones that appoint a single managed partner early – before the fit-out contractor is even briefed.
The Decant Problem – What Happens to Your Team During the Works?
This is the question that gets asked last and should be asked first. Whether you’re fitting out a new space or refurbishing your existing one, your people need somewhere to work while the work happens. The answer to that question shapes the entire programme.
Temporary decant options
The main options are:
Serviced offices: flexible, fast to set up, expensive for anything beyond 8–12 weeks
Phased occupation of the new space: if the fit-out is being done in phases, teams move in as each zone completes
Remote working: viable for some teams, not for all – and not a substitute for a proper decant plan
Temporary accommodation in another owned or leased building: the most cost-effective option if you have it
The right answer depends on your headcount, your work patterns, your lease obligations, and your programme timeline. We help clients work through this as part of our relocation project planning service.
Phased works to minimise disruption
A phased programme – where the building is divided into zones and work proceeds zone by zone – is the most common way to avoid a full decant. It works well for refurbishments and for Cat B fit-outs where the shell is already habitable.
The trade-off: phased programmes typically add 20–30% to the programme duration, and the contractor’s mobilisation costs are spread across more phases. But for many organisations, avoiding a full decant is worth that premium.
When a decant becomes a relocation
Here’s the scenario we see most often. A business plans a “temporary” decant into serviced offices for eight weeks while the refurbishment is completed. The programme overruns. Twelve weeks becomes sixteen. The serviced office costs mount. The team settles in. And suddenly the question is: are we actually moving?
This is not hypothetical. We’ve supported organisations through exactly this transition – where a planned decant became a permanent relocation because the original space no longer made sense. Our post-move support service is designed for the aftermath: settling teams in, managing snagging, and ensuring the new space actually works as intended.
If there’s any chance your decant could become a relocation, request a free consultation before you commit to a programme. Planning for both outcomes costs nothing; being caught unprepared costs a great deal.
Sustainability Considerations for Fit-Outs and Refurbishments
Sustainability is no longer a nice-to-have in commercial fit-out. It’s a board-level expectation, a lease obligation in many green leases, and – increasingly – a planning requirement. Here’s what the data says.
Embodied carbon in new fit-outs
A standard Cat B office fit-out generates approximately 185–190 kgCO2e per m² in embodied carbon – the emissions locked into the materials and construction process before anyone sits at a desk. British Land’s research suggests fit-outs can account for 20–30% of a commercial building’s whole-life carbon emissions.
JLL’s Manchester office fit-out, designed using circular economy principles, achieved 120 kgCO2e/m² – a 35% reduction against the standard benchmark. The biggest savings came from furniture reuse and reduced partitioning. The lesson: the choices made at Cat B stage have a disproportionate impact on the building’s carbon footprint.
A refurbishment, by retaining existing structure and services, almost always has a lower embodied carbon footprint than a new fit-out. UKGBC’s own office refurbishment recorded 139 kgCO2/m² – described at the time as the lowest embodied-carbon footprint for an office refurbishment in the UK. Refurbishment isn’t just cheaper; it’s greener.
We explore this in more depth in [Sustainable Office Relocation: How to Move Without the Environmental Cost].
Reuse and circular economy in refurbishments
The most effective way to reduce the carbon impact of any workspace project is to reuse what already exists. That means:
Retaining M&E systems where they meet current standards, rather than stripping and replacing
Reusing or remanufacturing furniture rather than buying new
Designing for disassembly so that future changes don’t generate waste
Our furniture management service is built around this principle. We audit existing furniture, identify what can be reused in the new or refurbished space, and manage the responsible disposal or donation of what can’t. It’s a practical circular economy approach – not a marketing claim.
WEEE compliance during strip-out
Any office strip-out – whether it’s a full decommissioning before a fit-out or a partial clearance during a refurbishment – will generate Waste Electrical and Electronic Equipment (WEEE). Under the Waste Electrical and Electronic Equipment (Amendment) Regulations 2025 (SI 2025 No. 910, in force from August 2025), WEEE must be segregated, handled by licensed carriers, and disposed of through approved treatment routes. Mixing it with general waste is a legal offence.
This is not a theoretical risk. We’ve seen organisations face significant remediation costs after contractors disposed of IT equipment and electrical fittings incorrectly during a strip-out. Our office strip-out service includes full WEEE compliance as standard – documented waste transfer notes, licensed carriers, and zero-to-landfill targets where achievable.
Our broader sustainability services programme covers the full lifecycle of a workspace project, from pre-move asset audit through to post-move carbon reporting.
How to Choose the Right Partner for Your Project
Most fit-out and refurbishment projects involve at least four parties: the client, the architect or interior designer, the main contractor, and the project manager. What’s often missing is a fifth party: someone who manages the operational complexity that sits alongside the construction programme.
That operational complexity includes:
Decant planning: where do people go, and when?
Asset management: what furniture and equipment transfers, what gets disposed of, and how?
IT and data infrastructure: how does connectivity transfer between spaces?
Logistics: how do removals, deliveries, and access get coordinated around the construction programme?
Compliance: WEEE, waste transfer, dilapidations documentation
Continuum Green is that fifth party. We’re not a fit-out contractor or an interior designer. We’re the managed partner who sits alongside your construction team and makes sure the operational side of the project doesn’t derail the construction side.
If your project involves a decant, a relocation, an office decommissioning and strip-out, or any form of asset disposal, contact Continuum Green before you finalise your programme. The earlier we’re involved, the more we can do.
For organisations planning a major workspace change, [How to Plan an Office Relocation: 8-Week Timeline] sets out the full programme framework – including the points at which fit-out, decant, and relocation workstreams need to be coordinated.
Frequently Asked Questions
What is the difference between a fit-out and a refurbishment?
A fit-out transforms an empty or shell space into a working office – you’re building a workplace from scratch. A refurbishment improves an existing, occupied space – you’re upgrading or reconfiguring what’s already there. The key question is whether you’re moving into a new space (fit-out) or improving the one you already occupy (refurbishment).
How much does a Cat B office fit-out cost in the UK?
In 2026, a standard Cat B fit-out typically costs £60–£95 per sq ft in regional UK cities, rising to £75–£140 per sq ft in London. High-specification schemes can reach £150–£250 per sq ft in central London. These figures cover construction only – add furniture, AV/IT, professional fees, and VAT for a true all-in budget. For a 5,000 sq ft office, expect £300,000–£475,000 on construction in the regions, and £700,000–£1.25 million all-in in London.
Do I need to move out during an office refurbishment?
Not necessarily. A phased refurbishment – dividing the space into zones and working through them sequentially – allows many businesses to stay in occupation throughout. However, a deep refurbishment that involves significant M&E works, structural changes, or a full strip-back will typically require at least a partial decant. The answer depends on the scope of works, the building’s configuration, and your team’s tolerance for disruption.
What is a decant in the context of an office fit-out?
A decant is the temporary relocation of staff and equipment from a workspace while construction or refurbishment works are carried out. It can range from moving one team to a different floor for two weeks, to relocating an entire organisation to serviced offices for several months. Decants are a normal part of major fit-out and refurbishment programmes – but they need to be planned carefully, because an unplanned or poorly managed decant is one of the most common causes of programme overrun and cost escalation.
Can Continuum Green help with the decant or relocation during a fit-out?
Yes – this is precisely what we do. We manage the operational complexity that sits alongside the construction programme: decant planning, logistics, asset management, WEEE-compliant strip-out, furniture reuse, and post-move support. We work alongside your fit-out contractor and project manager as the managed partner responsible for the operational side of the project. Discuss your project with us to understand how we can support your specific programme.
Is it better to refurbish or relocate?
It depends on four factors: your remaining lease term, the condition and configuration of your current space, your headcount trajectory, and your total cost of change. Refurbishment is usually cheaper, faster, and more sustainable if your space can be made to work. Relocation makes sense when the space genuinely can’t meet your needs, when a lease break or expiry creates a natural trigger, or when a culture or brand transformation demands a fresh start. The decision should be made on total cost of change – not just construction cost – and ideally with independent advice before you commit to either path.
Make the Right Decision for Your Business
The office fit-out vs refurbishment decision comes down to three questions:
Are you moving, or staying? If you’re moving, it’s a fit-out. If you’re staying, it’s a refurbishment – unless the scope of works is so extensive that the distinction collapses.
What’s your total cost of change? Construction cost is only part of the picture. Factor in decant costs, dual-running rent, dilapidations, asset disposal, and productivity loss before you decide that moving is cheaper than staying.
What happens to your people while the work is underway? This question shapes the programme more than any other. Get the decant plan right, and the rest follows.
Whichever path you choose, the moment it involves a move, a decant, an asset disposal, or an office decommissioning and strip-out, you need a managed partner who understands the operational complexity – not just the construction programme.
That’s what Continuum Green does. We sit alongside your fit-out contractor, your designer, and your project manager, and we make sure the operational side of the project doesn’t derail the construction side. From relocation project planning and decant management through to post-move support and sustainability reporting, we manage the complexity so you don’t have to.
Ready to plan your project? Get a quote from Continuum Green today, or request a free consultation to talk through your options with our team.
Useful Sources
British Council for Offices (BCO) – Guide to Fit-Out: The industry-standard reference for office fit-out practice in the UK, covering Cat A, Cat B, and shell-and-core definitions, specification standards, and best-practice guidance for tenants and landlords.
FIS Client Guide: Office Fit-Out and Refurbishment: Published by the Finishes and Interiors Sector, this 18-step guide takes clients through the full fit-out and refurbishment process, from strategic brief to post-occupancy evaluation. Widely used across the UK industry.
Cushman & Wakefield – 2026 Office Fit-Out Cost Guide: Detailed regional cost benchmarks for UK office fit-outs in 2026, covering London, Manchester, Birmingham, and Glasgow, with construction-only and all-in cost ranges by category.
Knight Frank – Landlord Refurbishment Cost Guide (Spring 2026): Regional UK benchmarks for office refurbishment costs, produced by Knight Frank’s building consultancy team. Useful for landlords and tenants planning refurbishment at lease renewal.
UKGBC – Embodied Carbon Resources: The UK Green Building Council’s guidance on measuring and reducing embodied carbon in buildings, including case studies on low-carbon office fit-outs and refurbishments.
GOV.UK – WEEE Regulations Guidance: Official UK government guidance on the Waste Electrical and Electronic Equipment regulations, including the 2025 amendments (SI 2025 No. 910). Essential reading for anyone planning an office strip-out or decommissioning.