Permitted development rights allow homeowners to make certain changes without the need for a planning application. They were first introduced in 1995 but have been amended many times, giving people more freedom to make changes to their homes. For example, under current rules, larger single storey extensions don’t always require planning permission and are instead subject to a neighbourhood consultation scheme.
However, permitted development rules do vary slightly between countries in the UK and a number of areas including conservation areas, National Parks and Areas of Outstanding Natural Beauty are excluded, so you’ll need to run any plans by your Local Planning Authority before you start work.
It’s worth noting that many permitted development rights do not apply to flats.