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 £58,000 to £72,000 including VAT, or £2,300 to £2,900 per m² at Yorkshire and the Humber prices. Leeds charges £750 for building control on a 10 to 40 m² extension (full plans, including VAT): 11% below the typical council (£840), though its published schedule is older or undated. With design, a structural engineer, building control and a 15% contingency, budget £72,500 to £94,000.
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 | £58,000 to £72,000 | £72,500 to £94,000 |
| Double-storey extension, 40 m² | £84,000 to £106,000 | £104,000 to £136,000 |
| Dormer loft conversion, 30 m² | £52,000 to £64,000 | £65,000 to £83,500 |
| 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, 40-100 m² (full plans) | £850 |
| Extension 10 to 40 m² (building notice) | £850 |
| Loft conversion up to 40 m² | £800 |
| Garage conversion | £450 |
Leeds charges £750 for building control on a 10 to 40 m² extension (full plans, including VAT): 11% below the typical council (£840), though its published schedule is older or undated. Source: Leeds's building control charges, Not stated on page. Inc VAT figures in brackets.
Check before relying on it: the schedule is older than 2025 or undated, so check it is still current.
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 Leeds compares with every council we checked.
Notes on Leeds's schedule
Own page. Single combined full-plans charge. Loft figure is 1-2 rooms with dormer (without 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.
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 £58,000 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 fees and a 15% contingency, budget £72,500 to £94,000.
How much is building control in Leeds?
Leeds charges £750 (including VAT) for a 10 to 40 m² extension (full plans), according to its published schedule (Not stated on page).
How much does a loft conversion cost in Leeds?
A mid-range 30 m² dormer loft conversion in Leeds costs about £52,000 to £64,000 including VAT for the building work, and about £65,000 to £83,500 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