Permitted Development
Loft Conversions and Permitted Development Rights
Most loft conversions can be completed under permitted development rights, meaning you do not need planning permission. Permitted development allows you the right to make certain improvements to your home without the need for formal approval.
- keyboard_arrow_right A volume allowance of up to 40 cubic metres of additional roof space is permitted for terraced houses.*
- keyboard_arrow_right A volume allowance of up to 50 cubic metres of additional roof space is permitted for detached and semi-detached houses.*
- keyboard_arrow_right No extension is allowed beyond the plane of the existing roof slope on the principal elevation that faces the highway.
- keyboard_arrow_right No extension may be higher than the highest point of the existing roof.
- keyboard_arrow_right Materials used must be similar in appearance to those of the existing house.
- keyboard_arrow_right Verandas, balconies, and raised platforms are not permitted.
- keyboard_arrow_right Side-facing windows must be obscure-glazed, and any openings must be at least 1.7 metres above the floor.
- keyboard_arrow_right Roof extensions are not classified as permitted development in designated areas, including national parks, the Broads, areas of outstanding natural beauty, conservation areas, and World Heritage Sites.
- keyboard_arrow_right Roof extensions, except for hip-to-gable conversions, must be set back at least 20cm from the original eaves, where practicable.
- keyboard_arrow_right The roof enlargement must not overhang the outer face of the original house's wall.
- keyboard_arrow_right These permitted development allowances apply exclusively to houses.
Any More Questions?
For more help please visit the interactive loft conversions mini guide on the government planning portal.
Visit The Interactive Loft Conversions Guide
