Kitchen Extension Cost in Croydon: 2026 Price Guide

Ask a local builder what the most common job in Croydon is, and a rear kitchen extension is usually near the top of the list - understandable given Victorian high streets at the heart of local neighbourhoods, the modernist Fairfield Halls civic quarter, and villages like Sanderstead with a semi-rural, 18th-century character at the borough's edges 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

As with any ballpark figures, these cover the building work and a standard fit-out only - popular add-ons like bifold doors, roof lanterns and underfloor heating will move the total upward, sometimes significantly.

What affects the price locally

Access is usually what separates a straightforward Croydon 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 Sanderstead Village and Fairfield conservation areas - 21 in total across the borough, 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 Fairfield Halls and the historic Old Palace 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?

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 Croydon's conservation areas, permitted development rights can be restricted further, so it's worth checking with the London Borough of Croydon's planning department - or a builder who works in the area regularly - before you commit to a design.