@joel_gati: 3m rear extension Usually falls under standard Permitted Development, meaning a full planning application may not be required. 4.5m rear extension Gives you more space for a larger kitchen or open-plan living area. This would normally require a Prior Approval application. 6m rear extension The maximum depth available under Prior Approval for terraced, end-of-terrace and semi-detached homes. All measurements are taken from the original rear wall of the house. Approval is not automatic and will depend on the property, previous extensions, neighbours and local restrictions.

Joel | Architectural Planner

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Thursday 06 August 2026 17:36:34 GMT