Permitted Development Rules for Home Improvements
Planning permission in England is complicated. The rules are buried in legislation, the guidance is written for professionals, and getting basic answers often means paying for a consultant before you even know if your project is viable. These guides explain the permitted development rules in plain English so you can understand what applies to your property without needing a planning degree.
Depth limits, double-storey rules, Larger Home Extension route, party wall obligations
Loft ConversionsClass BVolume limits, dormer types, hip-to-gable, mansard, fire safety and party wall rules
OutbuildingsClass EGarden offices, sheds, garages. Height, boundary, coverage and sleeping accommodation rules
PorchesClass DThe 3m² limit, highway distance, when a porch becomes an extension
RooflightsClass CVelux windows, roof lanterns, 150mm protrusion rule, conservation rooflights
DrivewaysClass FPermeable vs impermeable, the 5m² rule, dropped kerbs, drainage options
Additional StoreysClass AAEligibility, prior approval, height limits, engineering and cost considerations