Estiquote

Local costs · East of England · September 2026

How much does an extension cost in Peterborough?

A mid-range 25 m² single-storey extension in Peterborough costs about £67,500 to £83,500 including VAT, or £2,700 to £3,300 per m² at East of England prices. Peterborough charges £666 for building control on a 10 to 40 m² extension (full plans, including VAT): the 11th cheapest of the 91 councils we checked, 21% 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 £83,500 to £107,000.

By Estiquote · Prices reviewed · Council fees from Peterborough's published schedule · How we calculate

Work out your project in Peterborough

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Typical prices in Peterborough

Mid-range finish, East of England prices, including VAT. The budget adds design and engineering fees, Peterborough's building control charge and a 15% contingency.
ProjectBuilding workBudget to plan for
Single-storey extension, 25 m²£67,500 to £83,500£83,500 to £107,000
Double-storey extension, 40 m²£97,500 to £123,000£119,000 to £156,000
Dormer loft conversion, 30 m²£60,500 to £74,500£74,500 to £95,500
Kitchen, medium£9,300 to £16,600£10,700 to £19,000
Bathroom refit£6,300 to £9,400£7,200 to £10,800

Building prices in East of England run about 7% above the UK average outside London. Kitchens and bathrooms vary less from place to place than extensions and lofts.

Building control fees in Peterborough

Peterborough council charges including VAT (plan and inspection combined)
WorkCharge
Extension up to 10 m² (full plans)£540
Extension 10 to 40 m² (full plans)£666
Larger extension, 40-100 m² (full plans)£798
Extension 10 to 40 m² (building notice)£708
Loft conversion up to 40 m²£672
Garage conversion£330

Peterborough charges £666 for building control on a 10 to 40 m² extension (full plans, including VAT): the 11th cheapest of the 91 councils we checked, 21% below the typical council (£840), though its published schedule is older or undated. Source: Peterborough's building control charges, 6 May 2019 (as 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 Peterborough compares with every council we checked.

Notes on Peterborough's schedule

Own page. Single full-plans charge. Loft figure is with dormer (without 552).

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 of England

Building control for a 10 to 40 m² extension:

Questions people ask

How much does an extension cost in Peterborough?

A mid-range 25 m² single-storey extension in Peterborough costs about £67,500 to £83,500 including VAT for the building work, or £2,700 to £3,300 per m², based on East of England prices reviewed in September 2026. With fees and a 15% contingency, budget £83,500 to £107,000.

How much is building control in Peterborough?

Peterborough charges £666 (including VAT) for a 10 to 40 m² extension (full plans), according to its published schedule (6 May 2019 (as stated on page)).

How much does a loft conversion cost in Peterborough?

A mid-range 30 m² dormer loft conversion in Peterborough costs about £60,500 to £74,500 including VAT for the building work, and about £74,500 to £95,500 with fees and a 15% contingency.

Before you get quotes