CAT A versus CAT B office fit-out

The two terms are used loosely in negotiations and precisely in contracts. The gap between those two habits is where a lot of unexpected cost sits.

5 minute read

What CAT A usually includes

CAT A is the landlord's product: raised floor, suspended ceiling, general and emergency lighting, primary services distribution and, normally, finished common areas and WCs. It is designed to let a floor, not to suit an occupier.

What CAT B adds

CAT B is everything that makes the space usable by one specific business: layout, partitions, meeting rooms, joinery, branding, furniture, AV, and the services modification needed to serve the actual density.

Where the boundary goes wrong

Two things cause most disputes. The first is a CAT A that is stripped out on day one of CAT B, which is money spent twice. The second is a services capacity assumption made at CAT A that does not support the occupier's density.

  • Ceiling and lighting removed immediately by the incoming tenant
  • Cooling capacity stated per square metre rather than per person
  • Fire detection layouts that assume an open plan
  • Reinstatement obligations that reverse the CAT B at lease end

Settle these before heads of terms

  • The precise CAT A specification, in writing
  • Cooling, fresh air and power capacity per floor
  • Whether a CAT A contribution can be applied to CAT B
  • Reinstatement obligations at lease expiry
  • Landlord approval durations for alterations

CAT A fit-out

Worked example

A project from the register.

Discuss an office project

Tell us about the floorplate and the date.

Tell us the building, the area, the scope you expect to hold and the date the business needs to move. We will set out how the programme would run and what has to be resolved first.