Kitchen Extension Cost in Hendon: 2026 Price Guide

Ask a local builder what the most common job in Hendon is, and a rear kitchen extension is usually near the top of the list - understandable given terraced residential dwellings around The Burroughs, and a linear village development around St Mary's Parish Church at Church End across much of the area. Most homeowners are chasing the same thing: a proper kitchen-diner instead of a cramped galley kitchen.

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 Hendon 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 Hendon The Burroughs and Hendon Church End 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 the RAF Museum 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 Hendon's conservation areas, expect those rights to be trimmed back further still - check with the London Borough of Barnet's planning department, or a builder who already works locally, before finalising a design.