Estiquote

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 £55,500 to £68,500 including VAT, or £2,200 to £2,700 per m² at North East prices. Newcastle upon Tyne charges £918 for building control on a 10 to 40 m² extension (full plans, including VAT): 9% above the typical council (£840). With design, a structural engineer, building control and a 15% contingency, budget £70,000 to £90,500.

By Estiquote · Prices reviewed · Council fees from Newcastle upon Tyne's published schedule · How we calculate

Work out your project in Newcastle upon Tyne

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Typical prices in Newcastle upon Tyne

Mid-range finish, North East prices, including VAT. The budget adds design and engineering fees, Newcastle upon Tyne's building control charge and a 15% contingency.
ProjectBuilding workBudget to plan for
Single-storey extension, 25 m²£55,500 to £68,500£70,000 to £90,500
Double-storey extension, 40 m²£80,500 to £101,000£100,000 to £131,000
Dormer loft conversion, 30 m²£49,500 to £61,000£62,500 to £80,500
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 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

Newcastle upon Tyne council charges including VAT (plan and inspection combined)
WorkCharge
Extension up to 10 m² (full plans)£672
Extension 10 to 40 m² (full plans)£918
Larger extension, 40-100 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 charges £918 for building control on a 10 to 40 m² extension (full plans, including VAT): 9% above the typical council (£840). Source: Newcastle upon Tyne's building control charges, 6 April 2026. Plan + inspection, 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 Newcastle upon Tyne compares with every council we checked.

Notes on Newcastle upon Tyne's schedule

Own schedule. Full plans = plan + inspection; a discounted single payment is also offered (600 / 846 / 1,104 inc VAT).

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 North East

Building control for a 10 to 40 m² extension:

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 £55,500 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 fees and a 15% contingency, budget £70,000 to £90,500.

How much is building control in Newcastle upon Tyne?

Newcastle upon Tyne charges £918 (including VAT) for a 10 to 40 m² extension (full plans), according to its published schedule (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 £49,500 to £61,000 including VAT for the building work, and about £62,500 to £80,500 with fees and a 15% contingency.

Before you get quotes