Kitchen Extension Planning Permission in Wembley

Whether a kitchen extension in Wembley needs planning permission usually comes down to size, not the fact of building one at all - most single-storey rear extensions qualify for permitted development, subject to the limits below and to Wembley's own conservation area restrictions.

Permitted development limits

Without full planning permission, a single-storey rear extension in Wembley 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 Brent 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 Wembley

Where the Barn Hill Estate and Wembley High Street conservation areas cover parts of Wembley, 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 Brent'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 Brent 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 Wembley will usually have a good instinct for whether your plans qualify, but the council's confirmation is what removes doubt entirely.