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Building Control fees

Extensions to a single dwelling

Limited to work not more than three storeys above ground level

Extensions and conversions

Code	Extensions	Full Plans application fee	Full Plans inspection fee	Building Notice fee	Regularisation fee
D01	Single storey extension with a floor area less than 10m²	£148	£371	£519	£649
D02	Single storey extension with a with floor area between 10m² and 40m²	£222	£519	£741	£927
D03	Single storey extension with floor area between 40m² and 100m²	£297	£593	£890	£1,112
D04	Multi-storey extension (i.e. some part 2 or 3 storeys in height) and floor area not exceeding 40m²	£297	£593	£890	£1,112
D05	Multi-storey extension (i.e. some part 2 or 3 storeys in height) and floor area 40m² to 100m²	£297	£667	£964	£1,241
D06	Extension comprising solely a garage, carport or store with a floor area less than 60m²	£148	£371	£519	£630
D07	Detached non-habitable domestic building with a floor area less than 60m²	£148	£371	£519	£649

Conversions

Code	Conversions	Full Plans application fee	Full Plans inspection fee	Building Notice fee	Regularisation fee
D08	Loft conversions with a floor area less than 40m²	£297	£593	£890	£1,112
D09	Loft conversions with a floor area between 40m² & 100m²	£297	£667	£964	£1,241
D10	Conversion of a garage to a habitable room	£148	£272	£420	£525

Multiple work reductions

Where more than one extension, or an extension and a loft conversion is proposed and the works are carried out concurrently, the individual fees should be combined and reduced by 30%.
Where domestic alterations up to £15,000 are to be carried out at the same time as work described in codes D01 – D09 above, the charge payable in Table C can be reduced by 30%.

If our standard charges do not cover your proposal, please ask us for a building control quote.