CAT A - What is it?
Understanding CAT A Commercial Fit-Outs
When it comes to preparing a commercial space for new tenants, fit-outs are typically
classified into different categories: Shell & Core, CAT A, CAT A+, and CAT B. Each stage builds on the last, progressing from a bare structure to a fully functional workspace.
In this article, we’ll focus on the CAT A fit-out — what it is, what it includes, who it’s for, and why it matters.
What is a CAT A Fit-Out?
A Category A (CAT A) fit-out refers to the basic internal finish of a commercial space, typically completed by the landlord to make the space ready for tenant-specific design (which comes later under CAT B). It essentially turns a raw, industrial-looking “shell and core” into a clean, blank canvas.
CAT A does not include the final design touches, branding, partitions, or furniture. Instead, it provides the functional infrastructure a tenant needs before customising the space.
What Does CAT A Typically Include?
While there’s no strict industry standard, most CAT A fit-outs will include:
Raised access flooring: For cable management and flexibility in workstation layout
Suspended ceilings with basic lighting
Basic mechanical and electrical (M&E) systems: Including air conditioning, ventilation, and power distribution
Fire detection and alarm systems
Finished internal walls (usually white)
Basic flooring: Sometimes just a concrete screed, sometimes carpet tiles, depending on the agreement
Blinds or window treatments (occasionally included)
The result is a clean, open-plan space — essentially move-in ready in a structural sense, but still needing a tenant’s personalisation to become a functioning office.
Who Is Responsible for a CAT A Fit-Out?
Usually, landlords deliver CAT A fit-outs as part of their leasing strategy. It helps attract tenants by presenting a space that’s close to usable, without committing to specific layouts or designs.
For developers, completing a CAT A fit-out increases the appeal and marketability of a building, especially in competitive commercial property markets.
That said, some tenants may negotiate a CAT A+ or turnkey space, which includes certain CAT B elements (like meeting rooms, kitchenettes, or furniture) to reduce the burden on their own teams.
CAT A vs. CAT B vs. CAT A+
Here’s a quick breakdown:
Fit-Out Type | What's Included |
Shell & Core | Bare bones structure (walls, roof, elevators, basic MEP) |
CAT A | Basic internal finish — lighting, floors, ceilings, HVAC, fire systems |
CAT A+ | A semi-fitted space with select CAT B elements — ready to occupy |
CAT B | Full tenant fit-out — partitions, branding, furniture, tech, kitchens |
Why Does CAT A Matter?
CAT A is a key milestone in commercial property development and leasing. It represents a balance between functionality and flexibility:
For landlords: It’s a way to demonstrate value without dictating tenant layout.
For tenants: It allows for customisation without starting from scratch.
For contractors: It defines the scope of work before tenant involvement begins.
It also has implications for dilapidations — at the end of a lease, tenants may be required to return the space to CAT A condition.
Final Thoughts
A CAT A commercial fit-out is a critical phase in preparing a commercial space for occupancy. While it doesn't offer a turnkey office solution, it lays the groundwork for a tenant to create a tailored workspace with their own design and branding.
Whether you're a landlord looking to attract tenants, or a business about to embark on your own fit-out journey, understanding the CAT A stage is essential for budgeting, planning, and setting expectations.
Contact us today to discuss how we can help.
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