Planning permission in Hounslow

Most single-storey rear extensions within the national permitted development limits don't need planning permission in Hounslow. The rules are stricter in its 33 conservation areas, where side extensions, two-storey extensions and loft dormers need permission. Check your address to see which rules apply.

Hounslow at a glance

Conservation areas: 33
Article 4 areas: 3
Protected landscapes: None
Planning decisions: London Borough of Hounslow

How many conservation areas are there in Hounslow?

Hounslow has 33 conservation areas. In a conservation area, permitted development rights are reduced: side extensions, two-storey extensions, loft dormers and cladding all need planning permission, and many councils add Article 4 directions on top.

Bedfont Green
Bedford Park
Bedford Park (article 4)
Chiswick High Road
Chiswick House
Cranford Village
Feltham Town Centre
Glebe Estate
Grand Union Canal & Boston Manor
Grand Union Canal and Boston Manor
Grove Park
Gunnersbury Park
Gunnersbury Park (article 4)
Hanworth Park
Heston Village
Hounslow Cavalry Barracks
Isleworth Riverside
Kew Bridge
Old Chiswick
Osterley Park
Spring Grove
Stamford Brook
St Dunstan's
St Paul's, Brentford
St Paul's Brentford
St Paul's Church
Strand on the Green
St Stephen's
The Butts
Thorney Hedge
Turnham Green
Wellesley Road
Woodlands Grove

Read more: extensions, loft dormers, garden rooms and solar panels in a conservation area.

Does Hounslow have Article 4 directions?

Hounslow has published 3 Article 4 areas. Inside them, some permitted development rights are removed, so work that would normally be allowed needs planning permission.

3 of the published areas don't say which rights they remove. Our checker tells people at those addresses to check with the council.

Directions listed by Hounslow:

Article 4(2) directions for Bedford Park and Gunnersbury Conservation areas
Change of use or development that would result in new dwellings (Class MA/ZA)
Dwellinghouses (C3) to small HMOs (C4) - borough-wide Article 4 Direction

What is an Article 4 direction?

Is any of Hounslow in a national park, National Landscape or green belt?

There is green belt in or bordering Hounslow. Householder permitted development rights apply as normal in the green belt, but if you need planning permission, green belt policy limits how much a home can be enlarged.

Listed buildings and protected trees in Hounslow

Listed buildings everywhere in England are recorded by Historic England, and the checker looks for them at every address. Hounslow doesn't publish listed building outlines, so where a listed building is recorded near an address, we ask the homeowner to check whether it's theirs.

Hounslow doesn't publish its tree preservation orders as data. If there are mature trees near your project, ask the council whether any are protected before you start.

What planning data does Hounslow publish?

Planning data published by London Borough of Hounslow
Data	Status	Records
Conservation area boundaries	Published	43
Article 4 direction boundaries	Published	3
Listed building outlines	Not published	0
Tree preservation order areas	Not published	0
Protected trees	Not published	0

Planning work on a home in Hounslow? Put a pin on your house and we'll check it against all of this.

Start a check

Other councils in London

Data from planning.data.gov.uk, published by London Borough of Hounslow and national bodies under the Open Government Licence, last updated here on 30 October 2026. London Borough of Hounslow website.