Planning permission in Slough
Most single-storey rear extensions within the national permitted development limits don't need planning permission in Slough. The rules are stricter in its 5 conservation areas, where side extensions, two-storey extensions and loft dormers need permission. Check your address to see which rules apply.
Slough at a glance
- Conservation areas
- 5
- Article 4 areas
- Not published
- Protected landscapes
- None
- Planning decisions
- Slough Borough Council
How many conservation areas are there in Slough?
Slough has 5 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.
- Colnbrook
- St Bernard's School
- St Mary's Church, Langley
- Sussex Place and Clifton Road
- Upton Park and Upton Village
Read more: extensions, loft dormers, garden rooms and solar panels in a conservation area.
Does Slough have Article 4 directions?
Slough hasn't published any Article 4 boundaries on planning.data.gov.uk. Most councils have at least one Article 4 direction, often in conservation areas, so check the council's website or ask its planning team before relying on permitted development.
What is an Article 4 direction?
Is any of Slough in a national park, National Landscape or green belt?
- There is green belt in or bordering Slough. 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 Slough
Listed buildings everywhere in England are recorded by Historic England, and the checker looks for them at every address. Slough 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.
Slough 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 Slough publish?
| Data | Status | Records |
|---|---|---|
| Conservation area boundaries | Published | 5 |
| Article 4 direction boundaries | Not published | 0 |
| Listed building outlines | Not published | 0 |
| Tree preservation order areas | Not published | 0 |
| Protected trees | Not published | 0 |
Planning work on a home in Slough? Put a pin on your house and we'll check it against all of this.
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Data from planning.data.gov.uk, published by Slough Borough Council and national bodies under the Open Government Licence, last updated here on 31 October 2026. Slough Borough Council website.