Guides · 30 July 2026 · 6 min
Barn conversions in Somerset: Class Q explained
What prior approval allows, where it does not apply, and when a full application is better.
Class Q allows certain agricultural buildings to become homes through prior approval rather than full planning permission. It is useful, but narrower than many people expect.
What qualifies
The building must have been in agricultural use and must be capable of conversion. The rules limit how much new building work is allowed, so structurally weak buildings may not qualify.
Where it does not apply
Listed buildings and some protected locations are excluded. Traditional stone barns are often better served by a full application that allows a more sensitive design.
Somerset specifics
Nutrient neutrality in the Somerset Levels and Moors catchment can affect new homes, including conversions. Check this early.
Related service: Loft conversions
