This guide explains planning permission rules affecting rear extension developments in Barnet.
Most householder development follows national permitted development rules unless local restrictions apply.
Development must comply with national permitted development height limits.
Extensions must comply with national permitted development depth limits.
Minor amendments to a proposal are usually accepted, providing no neighbour re-consultation is required. Major amendments may require a new application to ensure comprehensive evaluation and stakeholder engagement.
Roof alterations must comply with national permitted development rules.
We can only consider 'material planning considerations' when looking at your comments. The most common of these are:
Listed buildings, conservation areas, historic parks, gardens, and ancient monuments
Listed buildings, conservation areas, historic parks, gardens, and ancient monuments
Last verified 2026-01
UK permitted development legislation allows many rear extension projects without planning permission provided certain limits are followed.
However local planning authorities such as those covering Barnet may impose additional planning controls through conservation area policies or Article 4 directions.
Many rear extension projects in Barnet may fall under permitted development rights if they remain within national planning limits.
Development must comply with national permitted development height limits.
Minor amendments to a proposal are usually accepted, providing no neighbour re-consultation is required. Major amendments may require a new application to ensure comprehensive evaluation and stakeholder engagement.
Yes. Additional planning restrictions may apply in conservation areas or where Article 4 directions remove permitted development rights.
Planning applications for rear extension projects in Barnet are handled by the local planning authority covering Barnet, Greater London.
For official planning advice consult the council planning portal for your area or visit the UK Planning Portal.
This guide summarises planning rules affecting rear extension developments in Barnet.
Planning regulations may change and additional local planning policies may apply. Always confirm planning requirements with your local planning authority before starting development.
Last updated March 2026