Check planning constraints by postcode
Enter a postcode to check for conservation areas, listed buildings, green belt, Article 4 directions and tree preservation zones — the constraints that control what you can change about a property.
You can check whether a property is in a conservation area, the green belt, or covered by an Article 4 direction for free using official planning data. These constraints matter because they remove or restrict permitted development rights: in a conservation area you may need permission for windows, extensions and even satellite dishes; a listed building needs consent for almost any alteration, inside or out.
Frequently asked questions
What does living in a conservation area actually restrict?
Councils control demolition, restrict permitted development (extensions, cladding, sometimes windows and doors), and protect trees. Rules vary by council and many areas also have Article 4 directions that remove further rights. It usually also supports property values — the restrictions preserve the area's character.
What is an Article 4 direction?
A council order removing specific permitted development rights, meaning works that would normally be automatic (like converting a house to an HMO, or altering a front elevation) need a planning application instead.
Can I extend a listed building?
Sometimes, with listed building consent — but alterations without consent are a criminal offence, and that applies to interiors too. Budget for specialist architects and materials, and check what previous owners did: unauthorised past works become your problem when you buy.
More free checks
Official open data under the Open Government Licence. Indicative information only — always verify through full searches during conveyancing.