Kitchen Extension Cost in Wembley: 2026 Price Guide

A single-storey rear kitchen extension is one of the most popular projects among homeowners in Wembley, where 1930s semi-detached houses and inter-war 'Metroland' terraces, alongside the distinctive mock-Tudor and Art Deco houses of the Barn Hill Estate. It's usually the difference between a cramped galley kitchen and a proper kitchen-diner opening onto the garden.

Typical costs

• Small extension (up to 15m²): roughly £30,000-£45,000
• Medium extension (15-25m²): roughly £45,000-£70,000
• Larger or wraparound extension (25m²+): £70,000 upwards

None of these figures include the kitchen itself beyond a standard fit-out, so a higher-spec kitchen, bifold or sliding doors, a roof lantern and underfloor heating are all worth budgeting for separately on top.

What affects the price locally

The single biggest cost variable for a kitchen extension in Wembley tends to be access rather than the extension itself - narrow terraced streets with no side passage mean materials and spoil go through the house, which shows up in the price. On top of that, the Barn Hill Estate and Wembley High Street conservation areas often means closer attention to matching brick, roofline and windows, adding cost even where planning permission itself isn't required.

Foundations are the other variable: older Victorian and Edwardian houses near Wembley Stadium were often built on shallow footings, so a structural engineer may specify deeper or more extensive foundations than a newer property would need.

Do you need planning permission?

Permitted development covers a lot of single-storey rear extensions, but not without limits, and those limits bite harder on terraced and semi-detached houses than detached ones. Inside Wembley's conservation areas, expect those rights to be trimmed back further still - check with the London Borough of Brent's planning department, or a builder who already works locally, before finalising a design.