Understanding the Difference Between Cat A and Cat B Fit Outs
- hello353021
- Sep 5
- 3 min read
A Guide by EDGE. Design & Fit Out
When it comes to designing and delivering commercial interiors, two terms you’ll often hear are Cat A and Cat B fit outs. These categories define different stages and scopes of a commercial office refurbishment or build. But for many clients, the difference isn’t always clear — and making the wrong assumption can lead to costly surprises down the line.
At EDGE. Design & Fit Out, we believe in transparency and clarity. Here’s our quick guide to understanding the difference between Cat A and Cat B fit outs — and why it matters for your business.
What is a Cat A Fit Out?
A Category A (Cat A) fit out is essentially a blank canvas. It’s the foundational stage of an office space that makes the building occupiable — but not ready for actual use.
A Cat A fit out typically includes:
Raised access flooring
Suspended ceilings and basic lighting
HVAC systems (heating, ventilation, and air conditioning)
Basic fire detection and alarm systems
Painted perimeter walls
Basic mechanical and electrical services
Think of Cat A as the “landlord’s fit out.” It’s often what you receive when you lease a new commercial space — clean, compliant, and empty.
What is a Cat B Fit Out?
A Category B (Cat B) fit out is where the space is transformed into a functional, branded, and bespoke working environment. This stage is all about tailoring the space to your team’s needs, workflows, and culture.
A Cat B fit out typically includes:
Partitioning and room layouts (e.g., meeting rooms, breakouts, private offices)
Branded design and decoration
Furniture specification and installation
Specialist lighting and AV systems
Kitchenettes and tea points
IT infrastructure and data cabling
Final finishes and styling
This is where the magic happens — and where EDGE. Design & Fit Out specialises. We work closely with you to bring your vision to life, from initial concept to final delivery.
Cat A vs Cat B: Key Differences
Feature | Cat A | Cat B |
Purpose | Makes the space occupiable | Makes the space functional and tailored |
Who pays? | Usually the landlord | Usually the tenant |
Appearance | Empty shell with basic finishes | Fully furnished and branded |
Includes walls and rooms? | No | Yes |
Includes furniture? | No | Yes |
Suitable for move-in? | No | Yes |
Why This Matters
Understanding the difference between Cat A and Cat B is essential when budgeting, planning timelines, and setting expectations. Some clients receive a Cat A space and assume it's ready to move into — only to realise they still need a full Cat B fit out to make the space usable.
At EDGE. Design & Fit Out, we help our clients navigate these stages with confidence. Whether you’re moving into a new space or looking to refurbish your existing one, we deliver turnkey solutions that align with your business goals, brand identity, and budget.
Ready to Transform Your Space?
Whether you're starting with a Cat A blank canvas or looking to reimagine your current office, EDGE. Design & Fit Out is here to help. Our team of designers, project managers, and fit out specialists work with you every step of the way — from concept to completion.
Get in touch today to discuss your project and discover how we can create a workspace that works for you.
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