Local costs · North East · September 2026
How much does an extension cost in Newcastle upon Tyne?
A mid-range 25 m² single-storey extension in Newcastle upon Tyne costs about £56,000 to £68,500 including VAT, or £2,200 to £2,700 per m² at North East prices. Newcastle upon Tyne’s own published charge for building control on a 10 to 40 m² extension is £918 (full plans, including VAT): 9% above the typical council (£840). With a measured survey, building regulations drawings, a structural engineer, Newcastle upon Tyne’s own building control charge and a 15% contingency, plan for £68,500 to £87,000.
Work out your project in Newcastle upon Tyne
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Typical prices in Newcastle upon Tyne
| Project | Building work | Budget to plan for |
|---|---|---|
| Single-storey extension, 25 m² | £56,000 to £68,500 | £68,500 to £87,000 |
| Double-storey extension, 40 m² | £80,500 to £101,000 | £97,000 to £126,000 |
| Dormer loft conversion, 30 m² | £41,500 to £51,000 | £51,500 to £66,500 |
| Kitchen, medium | £8,500 to £15,000 | £9,700 to £17,300 |
| Bathroom refit | £5,600 to £8,400 | £6,400 to £9,600 |
Building prices in the North East run about 12% below the UK average outside London. Kitchens and bathrooms vary less from place to place than extensions and lofts.
Building control fees in Newcastle upon Tyne
| Work | Charge |
|---|---|
| Extension up to 10 m² (full plans) | £672 |
| Extension 10 to 40 m² (full plans) | £918 |
| Larger extension, 40 to 100 m² (full plans) | £1,176 |
| Extension 10 to 40 m² (building notice) | £846 |
| Loft conversion up to 40 m² | £1,050 |
| Garage conversion | £636 |
Newcastle upon Tyne’s own published charge for building control on a 10 to 40 m² extension is £918 (full plans, including VAT): 9% above the typical council (£840). Source: Newcastle upon Tyne’s building control charges. The charges apply from 6 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 Newcastle upon Tyne compares with every council we checked.
Notes on Newcastle upon Tyne’s schedule
Newcastle upon Tyne publishes its own schedule. A full plans charge is a plan fee plus an inspection fee; you can also pay a lower single fee up front (£600, £846 or £1,104 including VAT, by size).
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 East
Building control for a 10 to 40 m² extension:
- Stockton-on-Tees: £697
- Darlington: £710
- Durham: £743
- Northumberland: £780
- Sunderland: £840
- Gateshead: £965.34
- South Tyneside: £970
Questions people ask
How much does an extension cost in Newcastle upon Tyne?
A mid-range 25 m² single-storey extension in Newcastle upon Tyne costs about £56,000 to £68,500 including VAT for the building work, or £2,200 to £2,700 per m², based on North East prices reviewed in September 2026. With a measured survey, design, a structural engineer, Newcastle upon Tyne’s own building control charge and a 15% contingency, plan for £68,500 to £87,000.
How much is building control in Newcastle upon Tyne?
Newcastle upon Tyne’s own published charge for full plans approval of a 10 to 40 m² extension is £918 (including VAT). The charges apply from 6 April 2026.
How much does a loft conversion cost in Newcastle upon Tyne?
A mid-range 30 m² dormer loft conversion in Newcastle upon Tyne costs about £41,500 to £51,000 including VAT for the building work, and about £51,500 to £66,500 with fees, Newcastle upon Tyne’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 Newcastle upon Tyne? 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.