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Grand Designs Live
Permitted Development Rights
- Always check whether planning permission is needed before work begins.
- For most homes, no planning permission is required for extensions up to 24sqm or 20 per cent of the floor area of the original house, up to a maximum of 30sqm.
- Terraced homes and houses within a conservation area don’t need planning permission for extensions which don’t exceed 16sqm or 10 per cent of the area of the original house, again up to a maximum of 30sqm.
- If your extension exceeds this size, you’ll need to apply to your local authority.
- Planning departments will often insist that the design is in keeping with the existing building, and does not dominate or compete with it.See the UK planning’s site (ukplanning.com) for more information.














