Glossary
Material change of use
A material change of use is a planning concept: changing how land or buildings are used in a way that planning law treats as development. Converting a house to flats, or a shop to a home, are common examples.
Some changes are permitted development with prior approval; others need full planning permission.
Use classes and permitted changes differ by nation — England’s Use Classes Order is not universal.
Official source: When is permission required? (GOV.UK). Checked 27 October 2026.