Conservation areas, Article 4 and listed buildings explained

In a conservation area, under an Article 4 direction or in a listed building, work that elsewhere needs no permission can need the council’s consent. Check the home’s status with the council and Historic England or Cadw before you buy, especially if you plan to change it.

Checked 16 Oct 2026

Permitted development, the starting point

Many changes to a house can be made without applying for planning permission, under national rules called permitted development rights. Within set limits, they cover things like a modest rear extension, a loft conversion, a porch or replacement windows.

The three designations in this guide each narrow those rights or add a separate consent, so they matter most if you plan to change the home. Flats and maisonettes have very few permitted development rights to begin with, so most outside changes to a flat need permission wherever it is.

Conservation areas

A conservation area is a place the council has designated for its special architectural or historic interest: a historic town centre, a Victorian suburb or a village around its green, for example. The designation covers the whole area, not just its finest buildings.

Extensions and roofs: permitted development is tighter. Side extensions, rear extensions of more than one storey, cladding the outside and roof extensions such as dormers generally need planning permission.
Demolition: knocking down all or most of a building usually needs consent from the council.
Trees: you must give the council six weeks’ notice before cutting down, topping or lopping all but the smallest trees.
Design: the council judges applications on whether they preserve or enhance the character of the area, so expect it to ask for suitable materials and details.

Many councils publish an appraisal for each conservation area that describes what makes it special. It is worth reading before you plan any work.

Article 4 directions

An Article 4 direction is an order made by the council that removes particular permitted development rights in a defined area, so the work it names needs a planning application. Directions are common in conservation areas, where they often cover replacement windows and doors, front walls and gates, roof coverings, porches and painting the front of a house.

Some directions have nothing to do with heritage. A common example removes the right to turn a family home into a small shared house (a house in multiple occupation) without permission, which matters if you are buying to let.

Each direction lists exactly what it covers, so read its wording rather than assume. The council’s planning pages usually have a map of each direction and its text.

Listed buildings

A listed building is recognised nationally for its special architectural or historic interest. In England, Historic England keeps the National Heritage List; in Wales, Cadw keeps the record. Buildings are graded I, II* or II, and most listed homes are Grade II.

Listing covers the whole building, inside as well as out, and can extend to attached structures and some within its grounds. You need listed building consent for any work that affects its character, including inside: removing a wall or a fireplace, replacing original windows or changing the roof.

Carrying out unauthorised work to a listed building is a criminal offence, and the council can require the current owner to put it right even if a previous owner did the work. Ask the seller what has been done, and ask your conveyancer to check that consent was granted.

How to check a home’s status

Search the National Heritage List for England or, in Wales, Cadw’s Cof Cymru for the address. Check the map as well as the name: an entry may describe a whole terrace or use an old house number.
Look on the council’s website for conservation area maps, appraisals and Article 4 directions, or ask its planning department.
Search the council’s planning register for the home’s planning history, to see what has been applied for and approved.
Your conveyancer’s local authority search will confirm conservation area, listed building and Article 4 status, along with other local land charges.
If you plan to extend or alter the home, ask the council for pre-application advice, or speak to an architect or planning consultant, before you commit.

Historic England’s advice on living in a conservation area and Cadw’s guidance on listed buildings go into more detail. If you are weighing up insulation or new windows, see how to read an energy performance certificate.

Check it for a specific home

The Planning, heritage and land section of a HouseReport report answers a checklist for the address, including conservation area, Article 4, listed building, scheduled monument and registered park or garden, each with Yes, Possibly, Nearby, No or Not published. Not published means there is no record to check against, so ask the council. Look up any address to see which sections it has in the free preview.

Look up any address

The free preview shows which of these checks the report answers for that home.