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Fees and charges for domestic extensions and alterations

Domestic extensions to a single dwelling
Category Description Full plans Building notice Regularisation
Plan charge Inspection charge
1 Less than 10m2 £181.00 £222.00 £484.00 £500.00
2 Between 10m2 and 40m2 £302.00 £314.00 £739.00 £775.00
3 Between 40m2 and 100m2 £363.00 £455.00 £981.00 £1,030.00
4 Loft conversion £269.00 £314.00 £699.00 £720.00
5 Erection or extension of non-exempt detached garage or carport up to 100m2 £168.00 £168.00 £403.00 £425.00
6 Erection or extension of non-exempt attached garage or carport up to 100m2 £202.00 £202.00 £484.00 £515.00
Alterations to a single domestic building
Description Basis of charge Full Plans Building notice Regularisation 
Plan charge Inspection charge
Garage conversion Fixed fee £168.00 £235.00 £484.00 £500.00
Solid conservatory roof Fixed fee £94.50 £126.00 £264.60 £264.60
Alterations not included above Fixed price estimate <£2000 £94.50 £126.00 £264.60 £264.60
Fixed price estimate between £2001 & £5,000 £134.00 £134.00 £323.00 £345.00
Fixed price estimate between £5,001 and £25,000 £202.00 £275.00 £572.00 £595.00
Fixed price estimate between £25,001 and £50,000 £269.00 £346.00 £738.00 £770.00
Fixed price estimate between £50,001 and £100,000 £403.00 £416.00 £983.00 £1,040.00
Domestic electrical installations
Description Charge basis Full plans Building notice Regularisation
Plan charge Inspection charge
New house or rewire of existing Fixed price £94.50 £252.00 £415.80 £415.80
Extension, new consumer unit or other notifiable work Fixed price £94.50 £189.00 £340.20 £340.20

Electrical Safety

The charges above assume that any fixed electrical installation is carried out by a person accredited on the relevant “Competent Person Scheme”. If your electrical installer is not accredited, a supplementary charge will be made for the inspection and test of the electrical installation.

Charges do not include:

  • the cost of inspection and testing of fixed electrical installations
  • the inspection and testing of electrical installations to assess compliance with “Part P” of the Building Regulations 
Window and door replacement
Category Charge basis Full plans Building notice Regularisation
Plan charge Inspection charge
Up to 20 frames or thermal renovation with an estimated cost <£5000 Fixed price £141.00 included in plan charge £141.00 £150.00
Over 20 frames or thermal renovation with an estimated cost >£5000 Fixed price £179.00 included in plan charge £179.00 £195.00

Replacement doors and windows are controlled by building regulations. Where an installer is not accredited by a competent persons' scheme the work must be inspected by the council's building control officer.