Domestic extensions to a single building

This includes garage conversions, basement conversions and loft conversions.

An additional charge of £263.23 + VAT = £315.88 where work (e.g., electrical or gas fittings) is not to be certified as compliant with the building regulations by a person or body competent and registered to do so. The additional charge is for work when the relevant building work, or part thereof, has not been carried out by a person referred to in Regulation 7(5) (g) or (h) of the Building (Local Authority Charges) Regulations 2010 applies. It is additional to the inspection charge, building notice charge or regularisation charge.

Single storey extensions

Small extension less than 10m²

Full plans

Plans charge: £228.55

Inspection charge: £370.52

Building notice charge

Cost: £599.08

Regularisation charge

This is once works have already commenced.

Cost: £698.92

Medium extension more than 10m² but less than 40m²

Full plans

Plans charge: £228.55

Inspection charge: £508.63

Building notice charge

Cost: £737.19

Regularisation charge

This is once works have already commenced.

Cost: £860.05

Larger extensions 40m² to 100m²

Full plans

Plans charge: £228.55

Inspection charge: £720.42

Building notice charge

Cost: £948.97

Regularisation charge

This is once works have already commenced.

Cost: £1107.13

Multi-storey extension

Multi storey extension less than 40m²

Full plans

Plans charge: £228.55

Inspection charge: £536.25

Building notice charge

Cost: £764.81

Regularisation charge

This is once works have already commenced.

Cost: £892.27

Multi storey extension more than 40 and less than 200m²

Full plans

Plans charge: £228.55

Inspection charge: £738.82

Building notice charge

Cost: £967.38

Regularisation charge

This is once works have already commenced.

Cost: £1128.61

Conversions and other works

Loft conversion up to 2 rooms and no dormer

Full plans

Plans charge: £228.55

Inspection charge: £421.18

Building notice charge

Cost: £649.74

Regularisation charge

This is once works have already commenced.

Cost: £758.03

Loft conversion up to 2 rooms with dormer window

Full plans

Plans charge: £228.55

Inspection charge: £554.67

Building notice charge

Cost: £783.23

Regularisation charge

This is once works have already commenced.

Cost: £913.76

Conversion of garage to habitable room

Full plans

Plans charge: £228.55

Inspection charge: There is no inspection charge.

Building notice charge

Cost: £228.55

Regularisation charge

This is once works have already commenced.

Cost: £266.64

Erection or extension of a non-exempt garage up to 100m²

Full plans

Plans charge: £303.85

Inspection charge: There is no inspection charge.

Building notice charge

Cost: £303.85

Regularisation charge

This is once works have already commenced.

Cost: £354.49

Extension, creation or conversion of a basement up to 100m²

Full plans

Plans charge: £228.55

Inspection charge: £323.90

Building notice charge

Cost: £552.45

Regularisation charge

This is once works have already commenced.

Cost: £644.52

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