This guide explains planning permission rules affecting two storey extension developments in Cambridge.
Most householder development follows national permitted development rules unless local restrictions apply.
Marshall of Cambridge, the airport's owner has provided information on necessary height constraints and this is mapped by us as a constraint layer for use in relation to planning applications. This is based on Ordnance Survey data.
Extensions must comply with national permitted development depth limits.
Development near boundaries must follow national permitted development rules.
Roof alterations must comply with national permitted development rules.
Contaminated land is land that has become polluted as a result of a present or previous industrial activity. Contaminated material can affect the underlying ground or water within the ground and could harm people, building materials, water courses or nature.
Article 4s (restricted areas) give a local authority power to remove certain permitted development rights. They are used in locations such as conservation areas or local high streets, giving local authorities more control in these areas.
Listed building consent is required for works affecting listed buildings.
Last verified 2026-01
UK permitted development legislation allows many two storey extension projects without planning permission provided certain limits are followed.
However local planning authorities such as those covering Cambridge may impose additional planning controls through conservation area policies or Article 4 directions.
Many two storey extension projects in Cambridge may fall under permitted development rights if they remain within national planning limits.
Marshall of Cambridge, the airport's owner has provided information on necessary height constraints and this is mapped by us as a constraint layer for use in relation to planning applications. This is based on Ordnance Survey data.
Development near boundaries must follow national permitted development rules.
Yes. Additional planning restrictions may apply in conservation areas or where Article 4 directions remove permitted development rights.
Planning applications for two storey extension projects in Cambridge are handled by the local planning authority covering Cambridge, Cambridgeshire.
For official planning advice consult the council planning portal for your area or visit the UK Planning Portal.
This guide summarises planning rules affecting two storey extension developments in Cambridge.
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