Demystifying office fit out jargon: what’s the difference between CAT A and CAT B?

13 July 2023

If you’re relocating your office and considering a fit out, it’s likely you’ve already encountered some unfamiliar language. Not sure what the difference is between CAT A and CAT B? Our latest article demystifies the jargon and breaks down the elements likely to be included in each type of fit out. 

CAT means category and A or B refers to the scope of fit out.  


CAT A leaves a blank canvas for tenants with many Landlords opting for this so that their tenant can customise it to their specific requirements. Popular with tenants looking for a long-term, permanent home, this provides the opportunity to design your own interiors and make the space reflective of your brand.  

The key features of a CAT A fit out include: 

  • Foundations: The CAT A fit out covers the essential structural elements of the building, such as finished internal walls, reception areas and lift lobbies
  • Flexibility: CAT A aims to accommodate a wide range of potential tenants, leaving space for customisation to fit individual requirements and needs


CAT B is the process of bringing all the office design elements together to create a fully functioning workspace ready to move into. This makes them ideal for short-term tenants.  

The key characteristics of a CAT B fit out include: 

  • Interior design: CAT B focuses on all interior design elements, including partition walls, flooring, lighting, interiors and kitchen breakouts. 
  • Time and cost: Due to the level of customisation that goes into creating these fit outs, they typically require more time and investment. 

To find out more about what type of fit out is best for you and your company, get in touch with our team of consultants today. 

To find out more about how we can transform working lives, get in touch with our experienced team here.

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