Permitted Development Checker

How to use the Permitted Development Checker

1. Answer questions about your property type and location.
2. Describe the proposed work — extension, loft conversion, outbuilding, etc.
3. Enter the dimensions and position of the proposed development.
4. Get a preliminary assessment of whether the work falls under permitted development rights.

Why use this tool

• Saves time and money by identifying whether you likely need a full planning application.
• Based on the General Permitted Development Order 2015 (as amended) for England.
• Helps builders advise homeowner clients about planning requirements before starting design work.

Permitted development rights allow certain building works to proceed without a formal planning application. The rules are set out in the Town and Country Planning (General Permitted Development) (England) Order 2015. However, the conditions are detailed and depend on the property type, location (conservation area, listed building, AONB), and the specifics of the proposed work. This checker walks you through the relevant conditions with plain-English questions. It gives a preliminary indication only — for certainty, apply for a Lawful Development Certificate from your local planning authority.

Part of Builder Tools Utilities — construction tools for UK tradespeople.