Side return extension in Wandsworth

Usually a full householder application in Wandsworth — permitted development only covers side extensions that stay single storey, under 4m high and no wider than half the original house, and that route disappears entirely inside one of the borough's many conservation areas. Outside a conservation area a straightforward single-storey infill can still qualify, but most Wandsworth side returns are built as part of a wider wrap-around that itself exceeds permitted development limits, so budget for a full application either way.

Among the highest-return projects on the Wandsworth terraces; steelwork and party-wall work drive the cost.

Wandsworth's Victorian terrace stock is prime side-return territory, and the borough has one of London's strongest track records for the project — a consented infill on many streets gives a ready precedent to argue from. Because so many of these terraces sit within a conservation area, though, the side-return element specifically loses its permitted development rights even where the rear extension it's paired with keeps them, so a wrap-around scheme can end up straddling two different planning routes.

Under permitted development, side extensions (GPDO Class A) must be single storey, no more than 4m high and no wider than half the original house — but side extensions are excluded from PD entirely in conservation areas. Wrap-around schemes combining side and rear elements usually exceed PD limits and need full permission everywhere.

In practice, most London side returns proceed by full householder application. The good news is the precedent base: on streets of identical terraces, a consented side return three doors down is the strongest evidence your scheme can cite. Officers focus on the boundary wall height, neighbour daylight and the junction with the host roof.