Local costs · East Midlands · September 2026
How much does an extension cost in Harborough?
A mid-range 25 m² single-storey extension in Harborough costs about £60,500 to £74,000 including VAT, or £2,400 to £3,000 per m² at East Midlands prices. Harborough’s own published charge for building control on a 10 to 40 m² extension is £793.09 (full plans, including VAT): 6% below the typical council (£840). With a measured survey, building regulations drawings, a structural engineer, Harborough’s own building control charge and a 15% contingency, plan for £74,000 to £94,000.
Work out your project in Harborough
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Typical prices in Harborough
| Project | Building work | Budget to plan for |
|---|---|---|
| Single-storey extension, 25 m² | £60,500 to £74,000 | £74,000 to £94,000 |
| Double-storey extension, 40 m² | £86,500 to £109,000 | £105,000 to £136,000 |
| Dormer loft conversion, 30 m² | £44,500 to £55,000 | £55,500 to £72,000 |
| Kitchen, medium | £8,800 to £15,600 | £10,100 to £17,900 |
| Bathroom refit | £5,800 to £8,700 | £6,700 to £10,000 |
Building prices in the East Midlands run about 5% below the UK average outside London. Kitchens and bathrooms vary less from place to place than extensions and lofts.
Building control fees in Harborough
| Work | Charge |
|---|---|
| Extension up to 10 m² (full plans) | £502.47 |
| Extension 10 to 40 m² (full plans) | £793.09 |
| Larger extension, 10 to 50 m² (full plans) | £793.09 |
| Extension 10 to 40 m² (building notice) | £793.09 |
| Loft conversion up to 40 m² | £946.80 |
| Garage conversion | £517.95 |
Harborough’s own published charge for building control on a 10 to 40 m² extension is £793.09 (full plans, including VAT): 6% below the typical council (£840). Source: Harborough’s building control charges. The charges apply from 1 April 2026. The charges include VAT.
Private building control firms (registered building control approvers) set their own prices and are often competitive, so it is worth asking one or two for a quote as well. See how Harborough compares with every council we checked.
Notes on Harborough’s schedule
This schedule is shared by six councils in the Leicestershire Building Control Partnership. Its bands are up to 10 m², 10 to 50 m² and 50 to 100 m², so a 50 m² extension is in the 10 to 50 m² band. A 50 to 100 m² extension costs £889.96. The loft figure is for a loft with dormers; without them it is £808.58. The garage figure is for a conversion up to 36 m².
Planning
If your extension needs planning permission, a householder application in England costs £548. Many single-storey rear extensions are permitted development and need no application, and a lawful development certificate (£274) confirms it in writing.
Other councils in the East Midlands
Building control for a 10 to 40 m² extension:
- Nottingham: £762
- Bassetlaw: £786
- Blaby: £793.09
- Hinckley and Bosworth: £793.09
- Melton: £793.09
- Oadby and Wigston: £793.09
- Rutland: £793.09
- Erewash: £882
Questions people ask
How much does an extension cost in Harborough?
A mid-range 25 m² single-storey extension in Harborough costs about £60,500 to £74,000 including VAT for the building work, or £2,400 to £3,000 per m², based on East Midlands prices reviewed in September 2026. With a measured survey, design, a structural engineer, Harborough’s own building control charge and a 15% contingency, plan for £74,000 to £94,000.
How much is building control in Harborough?
Harborough’s own published charge for full plans approval of a 10 to 40 m² extension is £793.09 (including VAT). The charges apply from 1 April 2026.
How much does a loft conversion cost in Harborough?
A mid-range 30 m² dormer loft conversion in Harborough costs about £44,500 to £55,000 including VAT for the building work, and about £55,500 to £72,000 with fees, Harborough’s own building control charge and a 15% contingency.
Before you get quotes
- How to compare builders’ quotes line by line
- Plan your whole budget, including the costs people forget
- When quotes arrive, check each one against the typical range for your area
Work in Harborough? Firm listings on Estiquote’s map of checked local firms open soon: see what you’ll need. Listing will be free while we build the map, with at least 30 days’ notice before any charge.