Rear Extension London: Planning, Design and Build Guide
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Rear Extension London: Planning, Design and Build Guide

Atlas Editorial February 2026 1 min read
Introduction

Everything you need to know about planning and building a rear extension in London, from permitted development to design considerations.

A rear extension is one of the most popular ways to add space and value to a London home.

Planning permission vs permitted development

Many single-storey rear extensions fall under permitted development rights, meaning you may not need full planning permission.