Kitchen Extension Cost in Brixton: 2026 Price Guide

A single-storey rear kitchen extension is one of the most popular projects among homeowners in Brixton, where a 19th-century town centre of civic and commercial buildings around the market, with large terraced and semi-detached Victorian townhouses along Brixton Road. 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

Access is usually what separates a straightforward Brixton quote from an expensive one. Terraces without a side passage mean everything - materials in, spoil out - goes through the house, and builders price that in accordingly. Add to that the Brixton and Brixton Road conservation areas, where matching brick, roofline and window detailing to the existing building is typically expected even for extensions that wouldn't otherwise need planning permission.

Don't overlook foundations either: much of the older housing stock close to Brixton Market and Brixton Town Hall sits on shallow Victorian or Edwardian footings, which a structural engineer will often want to deepen or extend before an extension can be signed off.

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 Brixton's conservation areas, expect those rights to be trimmed back further still - check with the London Borough of Lambeth's planning department, or a builder who already works locally, before finalising a design.