Designing or refurbishing an office starts with one important question: which level of fit-out is right for your project? Whether you are a landlord or a tenant, understanding Cat A vs Cat B office fit-out UK options helps you budget with confidence. It also helps you avoid costly surprises.
What Is a Cat A Fit-Out?
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A Cat A fit-out in London and across the UK provides the essential framework of a workspace. It is usually delivered by landlords. This includes raised floors, suspended ceilings, lighting, and mechanical and electrical services sometimes with basic finishes. Think of it as a blank canvas: safe, functional, and ready for tenants to add their own design.
What Is a Cat B Fit-Out?
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A Cat B office fit-out UK is where the workplace truly comes to life. It is tenant-led and highly customisable. This stage includes partitions, meeting rooms, bespoke furniture, flooring, branding, and technology. Through a Cat B project transforms the shell into a fully functioning office. It reflects your company culture, identity, and way of working.
What Is a Cat A+ Fit-Out?
Cat A+ bridges the gap between Cat A and Cat B fit-outs. It is becoming increasingly popular in the UK, especially in London, where businesses need to move quickly. Many landlords now provide Cat A+ spaces that are ready to go, with fitted kitchens, breakout areas, and furniture. This setup allows companies to move in with minimal delay. It is particularly attractive for SMEs and businesses with short lease terms.
Cost and Timeline Comparison
When planning a Cat A vs Cat B office fit-out UK, understanding the cost and timeline differences can help you manage expectations and budget effectively.
Cat A
Typical scope: Shell and core, suspended ceilings, lighting, basic finishes
Cost range, UK per sq ft: £35 to £45
Average timeline: 6 to 10 weeks
Best for: Landlords preparing space for lease
Cat B
Typical scope: Full tenant design including partitions, branding, furniture
Cost range, UK per sq ft: £50 to £80
Average timeline: 8 to 14 weeks
Best for: Businesses creating a tailored workplace
Cat A+
Typical scope: Landlord provided “ready to go” workspace with partial Cat B finishes
Cost range, UK per sq ft: £45 to £60
Average timeline: 6 to 12 weeks
Best for: SMEs, short leases, quick move ins
Practical Scenarios: When to Choose Each
Cat A is ideal for landlords offering a clean, flexible space for future tenants.
Cat B suits businesses wanting a customised office that boosts productivity and showcases brand identity.
Cat A+ is best for tenants who want a quick move-in solution with reduced upfront costs compared to a full Cat B.
For further insights on workplace design and planning, visit RICS – Royal Institution of Chartered Surveyors, which provides guidance on office refurbishment and fit-out best practices.
Making the Right Choice
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Choosing the right Cat A vs Cat B office fit-out UK option depends on your goals, lease terms, and budget. It also depends on the experience you want for your team. An office fit-out in London or across the UK can feel daunting without the right advice.
Working with a professional design team ensures your project runs smoothly and that your workspace aligns with your company culture.
At Office Designer, we specialise in guiding businesses and landlords through Cat A, Cat B, and Cat A+ office fit-outs across London and the UK. Contact us today to discuss your project and let our team help you choose the best fit-out for your workspace.