- Project plans
- Project activities
- Legislation and standards
- Industry context
- Specialist wikis
Last edited 30 Aug 2021
Fit out of buildings
‘Fit out’ is a term used to describe the process of making interior spaces suitable for occupation. It is often used in relation to office developments, where the base construction is completed by the developer, and the final fit out by the occupant. The occupant will generally be leasing space as a tenant from the developer/landlord.
|...that Work needed to complete the internal layout and servicing of the building shell to meet the specific needs of an incoming occupier. The building shell is the structural and non-structural envelope of a building provided as a primary stage (usually for a speculative developer) for a subsequent project to fit out with internal accommodation works.|
Shell and core works will generally comprise the structure, cladding, base plant, completed common areas and external works. It will include fitted-out main reception, lobbies, staircases, toilets, lift shafts, basements, loading bays, car parking, and so on.
 Category A fit-out
- Raised floors and suspended ceilings.
- Distribution of mechanical and electrical services.
- Internal surface finishes.
If the tenant has very complex fit out requirements, this may impact on the category A fit out. In this case, they may make a contribution to the costs of the category A fit out to ensure that it meets their needs, and offset this against their own costs. This saves wasted time and money modifying the category A fit out.
 Category B fit-out
- Final finishes and branding.
- Installation of offices.
- Installation of specialist facilities in meeting rooms, board rooms conference rooms, and so on.
- Fitting out reception areas.
- Installation of specialist lighting.
- Installation of ICT equipment.
- Installation of audio visual equipment.
- Fit out of kitchen areas.
- Installation of furniture.
The developer may make ask the tenant to carry out some of their more sensitive category A works on their behalf during the category B fit out, when they may be less subject to damage. The developer will pay the tenant a sum equivalent to the cost of the works had they carried them out themselves.
These categories do not have standard definitions, and so it is very important that contract documentation sets out precisely what work is to be carried out and by who, rather than relying on ambiguous short-hand terms.
- What comprises the shell and core built by the developer, including space provision in common areas for tenant equipment such as standby generators, extra chillers, or uninterrupted power supply plant.
- What constitutes category A fit out installed by the tenant but funded by the developer/landlord.
- What tenant equipment is to be installed in common areas.
A rent-free period may be provided by the landlord as a notional contribution to the tenant’s fit out. It not unusual for a tenant to start fitting out their areas before completion of the shell and core works, although the rent-free period will be triggered by practical completion of the shell and core works.
The tenant’s fit out may involve rectifying problems in the developer's works. In order to meet the fit-out timetable these may be funded by the tenant who may then make a claim to recover their costs.
 Related articles on Designing Buildings Wiki
Featured articles and news
Fropm practice to research and the business of materials.
Terms, histories, theories and practices.
Alteration and everything else before demolition.
And CIOB's response.
Presidential update from CIAT's Eddie Weir PCIAT.
Rates freeze, NI cuts, full expensing; early election?
Could this be a remedy for condensation, damp or mould?
Unlocking a Healthier Tomorrow
Call for ministerial group and National Retrofit Delivery Plan.
The Great Transformation 1860–1920. Book review.
Including the devolved governments, CIOB, ECA, APM and IHBC.
AT awards small to medium size project category winner.
Formal and informal adaptive re-use or new use of buildings.
Temperatures hit new highs, yet world fails to cut emissions (again).
No longer enforcing certain waste transfer documentation.
Winners reactions during the event at the Park Plaza Hotel.
An exciting opportunity for stakeholders to collaborate.
Report from the BSRIA Briefing 2023, Cleaner Air, Better Tomorrow.