Kitchen Extension Planning Permission in Finchley

Most single-storey rear kitchen extensions in Finchley fall under permitted development, meaning no full planning application is needed - but the limits are specific, and Finchley's own conservation areas can remove that right entirely on some streets.

Permitted development limits

Without full planning permission, a single-storey rear extension in Finchley is typically capped at 3m beyond the rear wall for terraced and semi-detached houses, or 4m for detached houses. Going further - up to 6m or 8m respectively - is possible via the "larger home extension" prior approval route, which means notifying neighbours through the London Borough of Barnet and clearing an objection period before building.

Height limits typically apply too - commonly around 4m maximum for a single-storey rear extension, and no higher than 4m within 2m of a boundary.

What's different in Finchley

Where the Finchley Garden Village and Finchley Church End conservation areas cover parts of Finchley, permitted development rights for extensions are commonly restricted or removed entirely - materials, roofline and even window style may need to match the existing house rather than a standard modern finish. the London Borough of Barnet's planning department can confirm your specific property's status before you commit to a design.

Get it confirmed, don't assume it

Even where permitted development likely applies, a Lawful Development Certificate from the London Borough of Barnet is a formal, low-cost confirmation that protects you if a neighbour complains or you sell the house later. A builder who works regularly in Finchley will usually have a good instinct for whether your plans qualify, but the council's confirmation is what removes doubt entirely.