- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 12 Apr 2018
An ancillary area of a building is an area that supports the function/s of the primary areas, that is, it is not part of the primary purpose of the building, but is required in order that the primary purpose can function.
Examples of ancillary areas include:
- Plant rooms.
- Cleaners’ rooms.
- ICT rooms.
- Building services rooms.
- Storage rooms.
- Circulation spaces.
In residential buildings, ancillary areas include spaces which do not form part of the main dwelling directly, but nonetheless add some useful value, e.g. patio area, office, garage, conservatory, porch, utility room, and so on.
 Find out more
 Related articles on Designing Buildings Wiki
Featured articles and news
Common difficulties when improving the management of building services.
England’s railway heritage from the air. Book review.
Identifying interim heritage areas for a neighbourhood plan.
Inspecting and reporting on moisture-related problems.
Will Norway build the world's first floating tunnel?
Domestic Retrofit training course.
Preparing to sell a commercial property.
Local Plan Route Mapper and toolkit.
Thermal mass in buildings.
CIAT's AT Academy.
The UK's most dangerous industries to work in.