Estiquote

Local costs · North West · September 2026

How much does an extension cost in Blackpool?

A mid-range 25 m² single-storey extension in Blackpool costs about £58,500 to £72,500 including VAT, or £2,300 to £2,900 per m² at North West prices. Blackpool charges £654 for building control on a 10 to 40 m² extension (full plans, including VAT): the 6th cheapest of the 91 councils we checked, 22% below the typical council (£840). With design, a structural engineer, building control and a 15% contingency, budget £73,000 to £95,000.

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

Work out your project in Blackpool

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Typical prices in Blackpool

Mid-range finish, North West prices, including VAT. The budget adds design and engineering fees, Blackpool's building control charge and a 15% contingency.
ProjectBuilding workBudget to plan for
Single-storey extension, 25 m²£58,500 to £72,500£73,000 to £95,000
Double-storey extension, 40 m²£85,000 to £107,000£105,000 to £137,000
Dormer loft conversion, 30 m²£52,500 to £64,500£65,500 to £84,000
Kitchen, medium£8,700 to £15,400£10,000 to £17,800
Bathroom refit£5,700 to £8,600£6,600 to £9,900

Building prices in North West run about 7% below the UK average outside London. Kitchens and bathrooms vary less from place to place than extensions and lofts.

Building control fees in Blackpool

Blackpool council charges including VAT (plan and inspection combined)
WorkCharge
Extension up to 10 m² (full plans)£530
Extension 10 to 40 m² (full plans)£654
Larger extension, 40-60 m² (full plans)£810
Extension 10 to 40 m² (building notice)£720
Loft conversion up to 40 m²£673
Garage conversion£486

Blackpool charges £654 for building control on a 10 to 40 m² extension (full plans, including VAT): the 6th cheapest of the 91 councils we checked, 22% below the typical council (£840). Source: Blackpool's building control charges, Not stated (page modified 4 August 2026). Inc VAT ("All charges include VAT at 20%").

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 Blackpool compares with every council we checked.

Notes on Blackpool's schedule

Own page. Single submission charge. Loft figure is with dormer <=40 m2 (without 529.68).

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 West

Building control for a 10 to 40 m² extension:

Questions people ask

How much does an extension cost in Blackpool?

A mid-range 25 m² single-storey extension in Blackpool costs about £58,500 to £72,500 including VAT for the building work, or £2,300 to £2,900 per m², based on North West prices reviewed in September 2026. With fees and a 15% contingency, budget £73,000 to £95,000.

How much is building control in Blackpool?

Blackpool charges £654 (including VAT) for a 10 to 40 m² extension (full plans), according to its published schedule (Not stated (page modified 4 August 2026)).

How much does a loft conversion cost in Blackpool?

A mid-range 30 m² dormer loft conversion in Blackpool costs about £52,500 to £64,500 including VAT for the building work, and about £65,500 to £84,000 with fees and a 15% contingency.

Before you get quotes