Complete GPDO Guide
Everything you need to know about the General Permitted Development Order
Important Disclaimer
This guide provides general information about permitted development rights under the GPDO. It is not legal advice. Every property and situation is unique. Always verify your specific circumstances with your local planning authority before proceeding with any development. For complex cases, consult a qualified planning professional.
Critical: Class B (Roof Enlargements) in Designated Areas
Class B permitted development rights do NOT apply to properties in Conservation Areas, AONBs, National Parks, the Broads, or World Heritage Sites.
This is a complete prohibition under B.1(f), not just additional restrictions. If your property is in any designated area, you must apply for planning permission for any roof enlargement, including dormers and loft conversions.
There is no exception for rear-facing dormers. A Lawful Development Certificate cannot be used for Class B in designated areas.
The General Permitted Development Order (GPDO) is a statutory instrument that grants planning permission for certain types of development without the need to make a planning application to your local planning authority.
The current order is the Town and Country Planning (General Permitted Development) (England) Order 2015, as amended. It allows homeowners to make certain improvements and alterations to their homes without needing to apply for full planning permission, subject to specific conditions and limitations.
The GPDO is divided into different "Parts" and "Classes", each covering specific types of development. For homeowners, the most relevant sections are: • Part 1: Development within the curtilage of a dwellinghouse • Part 2: Minor operations
These permitted development rights exist to reduce the burden on both homeowners and local planning authorities for minor, uncontroversial developments.
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