Planning an office fit-out can be one of the most impactful investments your business makes – not just in terms of physical space, but in boosting team morale, productivity, and professional image. Yet when it comes to budgeting, many companies struggle with understanding the full scope of what an office fit-out truly involves.
At Corporate Interiors, we’ve worked with businesses across the UK to design, specify and deliver workspaces that balance functionality with style, all while staying on budget. In this guide, we’ll take you through the key costs associated with an office fit-out and offer practical tips to help you budget effectively from the outset.
What Is an Office Fit-Out?
An office fit-out is the process of transforming an empty or outdated space into a fully functioning, aesthetically appealing workplace tailored to your organisation’s needs. It covers everything from layout and design through to construction, furniture, mechanical and electrical systems, and final finishes.
Cat A vs. Cat B Fit-Outs
Before we get into costs, it’s important to understand the distinction between:
- Category A Fit-Out: A basic finish provided by landlords. Includes raised floors, suspended ceilings, lighting, and HVAC – but not internal walls, furniture or branding.
- Category B Fit-Out: A complete fit-out designed for occupancy. Includes partitions, furniture, flooring, decoration, IT infrastructure, and more.
Most businesses engaging Corporate Interiors are undertaking a Cat B fit-out, either in a new location or as part of a refurbishment.
How Much Does an Office Fit-Out Cost in the UK?
There’s no one-size-fits-all answer, but we can provide ballpark figures based on our experience delivering projects across different sectors and regions.
Typical Cost Ranges (Per Square Foot)
- Basic Fit-Out: £40-£60 per sq ft
- Mid-Range Fit-Out: £60-£90 per sq ft
- High-End Fit-Out: £100+
Example Cost Breakdown by Office Size
- 5,000 sq ft office:
- Basic: ~£200,000
- Mid-range: ~£250,000–£450,000
- 10,000 sq ft office:
- Basic: ~£400,000
- High-end: £600,000+
Note: Costs can vary based on region, existing infrastructure, and project scope.
For businesses looking to make the most of a limited budget, explore our guide to affordable office fit-outs for small businesses.
What Influences the Cost of an Office Fit-Out?
Understanding where your money goes helps make better decisions and avoids unpleasant surprises later in the process. Here are the major components:
1. Design & Consultancy
- Space planning, 3D visualisations, building surveys
- Cost: ~5-10% of total fit-out budget
- Benefits: Improves workflow, employee wellbeing, brand expression
2. Furniture & Furnishings
- Desks, chairs, storage, breakout furniture, acoustic solutions
- Varies depending on quantity, quality and brand
- Tip: Consider leasing options or blending new and existing furniture
3. Partitioning & Interior Build
- Glass walls, plasterboard partitions, ceilings, flooring, joinery
- Includes painting, decorating and branding elements
- Acoustic requirements can affect both cost and design
4. Mechanical & Electrical (M&E)
- Lighting, power, HVAC, fire alarms, emergency lighting
- Often the largest cost category in tech-heavy environments
- Ensure all systems meet current building regulations
5. IT & AV Infrastructure
- Data cabling, server room setup, conference AV, screens
- Growing demand for hybrid-ready meeting rooms
- Don’t forget about security and access control systems
6. Project Management & Compliance
- Planning permission, building control, CDM regulations
- On-site project management ensures deadlines and budgets are maintained
Commonly Overlooked Costs
Budgeting for a fit-out isn’t just about materials and labour. Here are hidden costs that often catch businesses off guard:
Dilapidations
If you’re moving out of your current space, your lease may require you to restore it to its original condition. This can include removing partitions, carpets, and reinstating ceilings or lighting.
Contingency Fund
Set aside 5-10% of the budget for unexpected issues such as structural discoveries, supplier delays, or material shortages.
Business Continuity
Costs may arise from temporary relocation, phased works, or out-of-hours installation to minimise disruption.
Planning & Building Control
Some works (e.g. mezzanines, M&E changes) may require permissions or certification, which carry associated costs.
How to Budget Effectively for Your Office Fit-Out
Set Clear Objectives from Day One
- Why are you undertaking a fit-out?
- What outcomes are you hoping to achieve? (e.g. collaboration, staff retention, energy efficiency)
Define Your Priorities
- Split your wish list into ‘must-haves’ and ‘nice-to-haves’
- Focus on ROI-driven investments like ergonomic furniture or improved acoustics
Engage a Fit-Out Partner Early
- A turnkey provider like Corporate Interiors can consolidate design, compliance and build into one streamlined process
- Early engagement avoids duplication and late-stage changes
Request a Detailed Cost Plan
- Ask for an itemised breakdown so you can see where your money is going
- Review line items for value engineering opportunities
Consider Phasing the Project
- If budget is tight, look at delivering in phases without compromising the long-term vision
Understanding your office fit-out timeline helps avoid cost overruns and disruption.
Save or Spend? Making Strategic Fit-Out Decisions
When to Save
- Reuse existing furniture where appropriate
- Choose standard finishes over bespoke
- Rationalise meeting rooms or enclosed offices
When to Invest
- Ergonomics: Chairs and desks that promote wellbeing
- Technology: Hybrid meeting tools and secure connectivity
- Client Spaces: Reception and meeting rooms shape your brand perception
Stay up to date with the latest office fit-out trends for 2025 to make informed investment choices.
Why Fit-Out Cost Should Be Seen as an Investment
A well-executed office fit-out is not just a cost centre – it’s a strategic tool. When done right, it helps:
- Boost employee productivity
- Attract and retain talent
- Reduce operational costs (e.g. energy-efficient lighting)
- Reflect your brand values to clients and stakeholders
At Corporate Interiors, we work closely with clients to ensure every pound spent delivers measurable value. From concept to completion, we take care of everything – leaving you free to focus on running your business.
Final Thoughts
Understanding the full cost of an office fit-out allows you to plan confidently and avoid unexpected setbacks. By working with an experienced partner and taking a strategic approach to budgeting, you can deliver a workplace that not only looks the part but supports your people and business goals.
Ready to Get Started?
If you’re planning an office fit-out or just want to understand what’s possible within your budget, get in touch with our team. We offer no-obligation consultations and can provide a tailored cost plan to get your project moving in the right direction.
Explore our latest office fit-out projects or contact us today to book your discovery call.
