Estiquote

Local costs · East Midlands · September 2026

How much does an extension cost in Harborough?

A mid-range 25 m² single-storey extension in Harborough costs about £60,000 to £74,000 including VAT, or £2,400 to £3,000 per m² at East Midlands prices. Harborough charges £793 for building control on a 10 to 40 m² extension (full plans, including VAT): 6% below the typical council (£840). With design, a structural engineer, building control and a 15% contingency, budget £74,500 to £97,000.

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

Work out your project in Harborough

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Typical prices in Harborough

Mid-range finish, East Midlands prices, including VAT. The budget adds design and engineering fees, Harborough's building control charge and a 15% contingency.
ProjectBuilding workBudget to plan for
Single-storey extension, 25 m²£60,000 to £74,000£74,500 to £97,000
Double-storey extension, 40 m²£86,500 to £109,000£107,000 to £140,000
Dormer loft conversion, 30 m²£53,500 to £66,000£67,000 to £86,000
Kitchen, medium£8,800 to £15,600£10,100 to £17,900
Bathroom refit£5,800 to £8,700£6,700 to £10,000

Building prices in East Midlands run about 5% below the UK average outside London. Kitchens and bathrooms vary less from place to place than extensions and lofts.

Building control fees in Harborough

Harborough council charges including VAT (plan and inspection combined)
WorkCharge
Extension up to 10 m² (full plans)£502
Extension 10 to 40 m² (full plans)£793
Larger extension, 10-50 m² (50-100 m²: 889.96) (full plans)£793
Extension 10 to 40 m² (building notice)£793
Loft conversion up to 40 m²£947
Garage conversion£518

Harborough charges £793 for building control on a 10 to 40 m² extension (full plans, including VAT): 6% below the typical council (£840). Source: Harborough's building control charges, 1 April 2026. Inc VAT ("all charges include VAT unless otherwise stated").

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 Harborough compares with every council we checked.

Notes on Harborough's schedule

Shared schedule: Leicestershire Building Control Partnership (6 councils). Bands <=10 / 10-50 / 50-100 m2, so a 50 m2 extension is in the 10-50 band (50-100 m2 = 889.96). Loft figure is with dormers (without 808.58). Garage conversion up to 36 m2.

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 Midlands

Building control for a 10 to 40 m² extension:

Questions people ask

How much does an extension cost in Harborough?

A mid-range 25 m² single-storey extension in Harborough costs about £60,000 to £74,000 including VAT for the building work, or £2,400 to £3,000 per m², based on East Midlands prices reviewed in September 2026. With fees and a 15% contingency, budget £74,500 to £97,000.

How much is building control in Harborough?

Harborough charges £793 (including VAT) for a 10 to 40 m² extension (full plans), according to its published schedule (1 April 2026).

How much does a loft conversion cost in Harborough?

A mid-range 30 m² dormer loft conversion in Harborough costs about £53,500 to £66,000 including VAT for the building work, and about £67,000 to £86,000 with fees and a 15% contingency.

Before you get quotes