Local costs · East Midlands · September 2026
How much does an extension cost in Bassetlaw?
A mid-range 25 m² single-storey extension in Bassetlaw costs about £60,000 to £74,000 including VAT, or £2,400 to £3,000 per m² at East Midlands prices. Bassetlaw charges £786 for building control on a 10 to 40 m² extension (full plans, including VAT): 6% below the typical council (£840). With design, a structural engineer, building control and a 15% contingency, budget £74,500 to £97,000.
Work out your project in Bassetlaw
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Typical prices in Bassetlaw
| Project | Building work | Budget to plan for |
|---|---|---|
| Single-storey extension, 25 m² | £60,000 to £74,000 | £74,500 to £97,000 |
| Double-storey extension, 40 m² | £86,500 to £109,000 | £107,000 to £140,000 |
| Dormer loft conversion, 30 m² | £53,500 to £66,000 | £67,000 to £86,000 |
| 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 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 Bassetlaw
| Work | Charge |
|---|---|
| Extension up to 10 m² (full plans) | £671 |
| Extension 10 to 40 m² (full plans) | £786 |
| Larger extension, over 40 m² (full plans) | Not published |
| Extension 10 to 40 m² (building notice) | £785 |
| Loft conversion up to 40 m² | £786 |
| Garage conversion | £507 |
Bassetlaw charges £786 for building control on a 10 to 40 m² extension (full plans, including VAT): 6% below the typical council (£840). Source: Bassetlaw's building control charges, 1 April 2026. Inc VAT columns.
Private approved inspectors set their own prices and are often competitive, so it is worth asking one or two for a quote as well. See how Bassetlaw compares with every council we checked.
Notes on Bassetlaw's schedule
Own page. Bands <=20 / 20-40 m2 only (so <=10 uses the <=20 band; nothing published above 40 m2). Lofts share the extension rows.
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.
Other councils in East Midlands
Building control for a 10 to 40 m² extension:
- Nottingham: £762
- Blaby: £793
- Harborough: £793
- Hinckley and Bosworth: £793
- Melton: £793
- Oadby and Wigston: £793
- Rutland: £793
- Erewash: £882
Questions people ask
How much does an extension cost in Bassetlaw?
A mid-range 25 m² single-storey extension in Bassetlaw costs about £60,000 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 fees and a 15% contingency, budget £74,500 to £97,000.
How much is building control in Bassetlaw?
Bassetlaw charges £786 (including VAT) for a 10 to 40 m² extension (full plans), according to its published schedule (1 April 2026).
How much does a loft conversion cost in Bassetlaw?
A mid-range 30 m² dormer loft conversion in Bassetlaw costs about £53,500 to £66,000 including VAT for the building work, and about £67,000 to £86,000 with fees 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
- Trades: price an extension element by element with editable unit rates