Extensions, Loft Conversions, Garages and Carports
Extension means an extension of the internal floor area of a building used, or intended to be used, for the purpose of a single private dwelling. An extension has no more than 3 storeys, each basemenet level counting as one storey.
A reference to a dwelling is a reference also to a building consisting of a garage and/or carport, which is occupied in commone with a house or with a building consisting of flats and/or maisonettes.
Where the work comprises of two or more extensions, or an extension with more than one storey, the total internal floor areas of all such extensions/storeys may be aggregated in determining the charge payable.
Charges for extensions include means of access and work in connection with that extensions. Additional works up to a value of £500 are also included.
Floor areas quoted in the table below, are calculated from the gross internal finished floor areas.
An attached garage is classed as an extension.
Table B only relates to garages, carports and extensions which do not exceed 60m² in area. For any garage, extension or carport which has an internal floor area in excess of 60m², refer to Table C.
A detached garage with an internal floor area less than 30m² may be exempt. Please see Frequently Asked Questions for further information on exempt structures.
These notes are for guidance only. For further details please see our Scale of Charges.
Building Control Scheme of Charges (240kb)