Kitchen Extension Cost in Notting Hill: 2026 Price Guide

Ask a local builder what the most common job in Notting Hill is, and a rear kitchen extension is usually near the top of the list - understandable given pastel-coloured Victorian and Georgian townhouses along curved streets and garden squares, laid out to an 1823 plan by architect Thomas Allason 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

Treat these as a starting point rather than a quote - they assume standard building work and a reasonable-but-not-luxury fit-out. Adding bifold doors, a roof lantern or underfloor heating will push the final number up.

What affects the price locally

The single biggest cost variable for a kitchen extension in Notting Hill 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 Ladbroke and Pembridge conservation areas - the borough has 38 in total, covering over two-thirds of its area 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 Portobello Road Market 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?

Many single-storey rear extensions fall under permitted development, but there are limits on how far you can extend without full planning permission, and those limits are usually tighter for terraced and semi-detached houses than detached ones. If your home is in one of Notting Hill's conservation areas, permitted development rights can be restricted further, so it's worth checking with the Royal Borough of Kensington and Chelsea's planning department - or a builder who works in the area regularly - before you commit to a design.