Local costs · Yorkshire and the Humber · September 2026
How much does an extension cost in Leeds?
A mid-range 25 m² single-storey extension in Leeds costs about £58,500 to £72,000 including VAT, or £2,300 to £2,900 per m² at Yorkshire and the Humber prices. Leeds’s own published charge for building control on a 10 to 40 m² extension is £750 (full plans, including VAT): 11% below the typical council (£840). The council’s published fee list is older or has no date, so check the current fee with the council before you budget. With a measured survey, building regulations drawings, a structural engineer, Leeds’s own building control charge and a 15% contingency, plan for £71,500 to £90,500.
Work out your project in Leeds
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Typical prices in Leeds
| Project | Building work | Budget to plan for |
|---|---|---|
| Single-storey extension, 25 m² | £58,500 to £72,000 | £71,500 to £90,500 |
| Double-storey extension, 40 m² | £84,000 to £106,000 | £101,000 to £131,000 |
| Dormer loft conversion, 30 m² | £43,000 to £53,500 | £53,500 to £69,000 |
| Kitchen, medium | £8,600 to £15,400 | £9,900 to £17,700 |
| Bathroom refit | £5,700 to £8,600 | £6,600 to £9,900 |
Building prices in Yorkshire and the Humber run about 8% below the UK average outside London. Kitchens and bathrooms vary less from place to place than extensions and lofts.
Building control fees in Leeds
| Work | Charge |
|---|---|
| Extension up to 10 m² (full plans) | £650 |
| Extension 10 to 40 m² (full plans) | £750 |
| Larger extension, 40 to 100 m² (full plans) | £850 |
| Extension 10 to 40 m² (building notice) | £850 |
| Loft conversion up to 40 m² | £800 |
| Garage conversion | £450 |
Leeds’s own published charge for building control on a 10 to 40 m² extension is £750 (full plans, including VAT): 11% below the typical council (£840). The council’s published fee list is older or has no date, so check the current fee with the council before you budget. Source: Leeds’s building control charges. The schedule doesn’t give a start date. The charges include VAT.
Check before relying on it: the schedule is older than 2025 or undated, so check it is still current.
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 Leeds compares with every council we checked.
Notes on Leeds’s schedule
Leeds publishes one combined full plans charge on its own page. The loft figure is for one or two rooms with a dormer; without one it is £700.
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 Yorkshire and the Humber
Building control for a 10 to 40 m² extension:
Questions people ask
How much does an extension cost in Leeds?
A mid-range 25 m² single-storey extension in Leeds costs about £58,500 to £72,000 including VAT for the building work, or £2,300 to £2,900 per m², based on Yorkshire and the Humber prices reviewed in September 2026. With a measured survey, design, a structural engineer, Leeds’s own building control charge and a 15% contingency, plan for £71,500 to £90,500.
How much is building control in Leeds?
Leeds’s own published charge for full plans approval of a 10 to 40 m² extension is £750 (including VAT). The schedule doesn’t give a start date.
How much does a loft conversion cost in Leeds?
A mid-range 30 m² dormer loft conversion in Leeds costs about £43,000 to £53,500 including VAT for the building work, and about £53,500 to £69,000 with fees, Leeds’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
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