Estiquote

Local costs · Wales · September 2026

How much does an extension cost in Bridgend?

A mid-range 25 m² single-storey extension in Bridgend costs about £56,500 to £70,000 including VAT, or £2,300 to £2,800 per m² at Welsh prices. Bridgend charges £587 for building control on a 10 to 40 m² extension (full plans, including VAT): the 4th cheapest of the 91 councils we checked, 30% below the typical council (£840). With design, a structural engineer, building control and a 15% contingency, budget £71,000 to £92,000.

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

Work out your project in Bridgend

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Typical prices in Bridgend

Mid-range finish, Wales prices, including VAT. The budget adds design and engineering fees, Bridgend's building control charge and a 15% contingency.
ProjectBuilding workBudget to plan for
Single-storey extension, 25 m²£56,500 to £70,000£71,000 to £92,000
Double-storey extension, 40 m²£82,000 to £104,000£101,000 to £133,000
Dormer loft conversion, 30 m²£51,000 to £62,500£63,500 to £81,500
Kitchen, medium£8,600 to £15,200£9,800 to £17,500
Bathroom refit£5,600 to £8,500£6,500 to £9,700

Building prices in Wales run about 10% below the UK average outside London. Kitchens and bathrooms vary less from place to place than extensions and lofts.

Building control fees in Bridgend

Bridgend council charges including VAT (plan and inspection combined)
WorkCharge
Extension up to 10 m² (full plans)£456
Extension 10 to 40 m² (full plans)£587
Larger extension, 40-100 m² (full plans)£716
Extension 10 to 40 m² (building notice)£591
Loft conversion up to 40 m²£690
Garage conversion£456

Bridgend charges £587 for building control on a 10 to 40 m² extension (full plans, including VAT): the 4th cheapest of the 91 councils we checked, 30% below the typical council (£840). Source: Bridgend's building control charges, 1 April 2026. Inc VAT figures (red) used.

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 Bridgend compares with every council we checked.

Notes on Bridgend's schedule

Own schedule. Loft figure is with new dormer (without 611).

Planning

In Wales, householder planning fees are set by the Welsh Government. Check the current fee on Planning Portal before you apply.

Other councils in Wales

Building control for a 10 to 40 m² extension:

Questions people ask

How much does an extension cost in Bridgend?

A mid-range 25 m² single-storey extension in Bridgend costs about £56,500 to £70,000 including VAT for the building work, or £2,300 to £2,800 per m², based on Wales prices reviewed in September 2026. With fees and a 15% contingency, budget £71,000 to £92,000.

How much is building control in Bridgend?

Bridgend charges £587 (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 Bridgend?

A mid-range 30 m² dormer loft conversion in Bridgend costs about £51,000 to £62,500 including VAT for the building work, and about £63,500 to £81,500 with fees and a 15% contingency.

Before you get quotes