Not all extensions require planning permission; there are some extensions that are permitted provided that they meet a set criteria.
These sort of extensions are called ‘Permitted Developments’ (‘PD’) but they do not apply in Conservation areas, commercial properties or houses that have been converted to flats.
• Single storey rear extensions not exceeding 3m (4m for detached houses)
• Single storey side extensions and some two storey rear extensions
• Most loft conversions provided additional volume does not exceed 40 Cu.m (50 Cu.m for semi and detached houses)
• Outbuildings with flat roofs, height not exceeding 2.5m
The Planning Enforcement teams are becoming increasingly pro-active in serving notices on unauthorised extensions; so we suggest you seek advice from a professional before you embark on a PD project.