Do I Need Planning Permission for my Loft Conversion?
You don’t normally require planning permission for a standard room-in-roof loft conversion – that may include a dormer – unless:
- the newly converted space is over 50m³ (40m³ for a terraced home);
- the dormer is beyond the plane of the existing roof slope on the front elevation;
- the dormer is higher than the current highest part of the roof (this is often the case in mansard style extensions);
- you want to include side windows that are non-obscure glazed and/or less than 1.7m above the floor;
- you live in a specially designated area such as a Conservation Area or your home is listed;
- the dormer will be within 20cm of the eaves.