Local costs · North West · September 2026
How much does an extension cost in Ribble Valley?
A mid-range 25 m² single-storey extension in Ribble Valley costs about £59,000 to £72,500 including VAT, or £2,400 to £2,900 per m² at North West prices. Ribble Valley’s own published charge for building control on a 10 to 40 m² extension is £718 (full plans, including VAT): the 21st cheapest of the 91 councils we checked, 15% below the typical council (£840). With a measured survey, building regulations drawings, a structural engineer, Ribble Valley’s own building control charge and a 15% contingency, plan for £72,000 to £91,500.
Work out your project in Ribble Valley
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Typical prices in Ribble Valley
| Project | Building work | Budget to plan for |
|---|---|---|
| Single-storey extension, 25 m² | £59,000 to £72,500 | £72,000 to £91,500 |
| Double-storey extension, 40 m² | £85,000 to £107,000 | £102,000 to £133,000 |
| Dormer loft conversion, 30 m² | £43,500 to £54,000 | £54,000 to £69,500 |
| Kitchen, medium | £8,700 to £15,400 | £10,000 to £17,800 |
| Bathroom refit | £5,700 to £8,600 | £6,600 to £9,900 |
Building prices in the North West run about 7% below the UK average outside London. Kitchens and bathrooms vary less from place to place than extensions and lofts.
Building control fees in Ribble Valley
| Work | Charge |
|---|---|
| Extension up to 10 m² (full plans) | £718 |
| Extension 10 to 40 m² (full plans) | £718 |
| Larger extension, 40 to 60 m² (full plans) | £902 |
| Extension 10 to 40 m² (building notice) | £823 |
| Loft conversion up to 40 m² | £699 |
| Garage conversion | Not published |
Ribble Valley’s own published charge for building control on a 10 to 40 m² extension is £718 (full plans, including VAT): the 21st cheapest of the 91 councils we checked, 15% below the typical council (£840). Source: Ribble Valley’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 Ribble Valley compares with every council we checked.
Notes on Ribble Valley’s schedule
Ribble Valley publishes its own schedule. Its bands are up to 6 m², 6 to 40 m² and 40 to 60 m², so a 10 m² extension is in the 6 to 40 m² band; up to 6 m² costs £484. The loft figure is for a loft with a dormer; without one it is £508.
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 North West
Building control for a 10 to 40 m² extension:
- Blackpool: £654.31
- Fylde: £660
- Oldham: £665
- Bury: £713
- Wyre: £714
- Cheshire West and Chester: £736.32
- Pendle: £756
- Liverpool: £822
- Stockport: £1,050
Questions people ask
How much does an extension cost in Ribble Valley?
A mid-range 25 m² single-storey extension in Ribble Valley costs about £59,000 to £72,500 including VAT for the building work, or £2,400 to £2,900 per m², based on North West prices reviewed in September 2026. With a measured survey, design, a structural engineer, Ribble Valley’s own building control charge and a 15% contingency, plan for £72,000 to £91,500.
How much is building control in Ribble Valley?
Ribble Valley’s own published charge for full plans approval of a 10 to 40 m² extension is £718 (including VAT). The charges apply from 1 April 2026.
How much does a loft conversion cost in Ribble Valley?
A mid-range 30 m² dormer loft conversion in Ribble Valley costs about £43,500 to £54,000 including VAT for the building work, and about £54,000 to £69,500 with fees, Ribble Valley’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 Ribble Valley? 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.