Approved planning applications · October 2026

Extending in Lambeth: what the council approves

Build Team has secured approval for 230 projects in Lambeth: 172 loft conversions and 56 ground floor extensions, across 15 postcode districts. The median approved floor area is 32.4 m². Lambeth does vary on boundary wall height but 2.5m is generally quite a safe height in regards to gaining planning consent.

What Lambeth council is like to work with

Lambeth is our home borough and we work with them frequently. They have recently become more flexible in allowing wraparounds which lots of our clients are taking advantage of.

Lambeth are flexible and often are vocal throughout the planning window in offering us the opportunity to amend drawings.

Boundary wall height

Lambeth does vary on boundary wall height but 2.5m is generally quite a safe height in regards to gaining planning consent.

Design considerations

Lambeth have recently allowed wraparound extensions which is a fantastic design option. In regards to Loft design, we would recommend going for a mansard design.

Guidance from Build Team's design team, based on applications we have submitted in this borough. Council policy changes: check the current local plan before you rely on it.

What has been approved in Lambeth

Type of project	Approved	Share
Loft conversions	172	75%
Ground floor extensions	56	24%
Change of use and other	2	1%
Houses / flats	174 houses, 56 flats
Median floor area	32.4 m² (average 36.1 m²)