Kitchen Extension Planning Permission in Kingston upon Thames

Whether a kitchen extension in Kingston upon Thames 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 Kingston upon Thames's own conservation area restrictions.

Permitted development limits

Without full planning permission, a single-storey rear extension in Kingston upon Thames 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 Royal Borough of Kingston upon Thames 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 Kingston upon Thames

Where the Kingston Old Town and Richmond Road conservation areas - 26 in total across the borough cover parts of Kingston upon Thames, 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 Royal Borough of Kingston upon Thames'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 Royal Borough of Kingston upon Thames 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 Kingston upon Thames will usually have a good instinct for whether your plans qualify, but the council's confirmation is what removes doubt entirely.