Slough might not have the chocolate-box conservation villages of some neighbouring boroughs, but that doesn't mean planning permission is a formality. Your chances of approval depend on a combination of factors specific to your property — and most homeowners don't realise how many of those factors are working behind the scenes before they even submit. WhatCanIBuild can show you what's actually been approved near you, and what that means for your project.
The short version
- Slough has 5 conservation areas and around 105 listed buildings — both carry restrictions that aren't always obvious
- Green Belt land covers parts of the borough and significantly limits what's permitted
- Your approval odds depend on your specific property, not just general rules
The constraints you might not know about
Slough isn't an AONB or National Park, which can make it feel like a straightforward borough for planning. But that confidence can catch homeowners out. Five conservation areas sit within the borough — and if your property falls within one, the rules around what you can do without permission change significantly. The same goes for the roughly 105 listed buildings on record. Being near a listed building isn't the same as being in one, but it's still a factor that can shape how your application is assessed.
Then there's Green Belt. Parts of Slough's boundary extend into Green Belt land, and properties here face a very different planning environment than those in the urban core. Most homeowners in affected areas don't realise the Green Belt designation applies to them until it's already a problem.
Why your street matters as much as the rules
National planning rules set a baseline — but what actually gets approved in Slough depends on how those rules are applied locally, and how your council has handled similar applications nearby. Two houses on the same street can have very different approval histories. One might have had a rear extension refused, while a near-identical application next door sailed through.
Article 4 directions can strip away permitted development rights in specific areas without much fanfare. If your postcode sits in an affected zone, works you assumed were automatically allowed might actually need full permission. Most homeowners only discover this after they've started.
Worth knowing
Slough Borough Council typically decides householder applications within 8 weeks, but applications involving conservation areas or Green Belt land often require additional consultation — which can extend that timeline.
What the approval rate doesn't tell you
National statistics show that the majority of householder planning applications in England are approved — but that headline figure masks enormous variation. A strong borough-wide approval rate tells you nothing about what happens to applications like yours, on a street like yours, with constraints like yours.
What actually matters is whether similar projects on your road got approved, whether refusals in your area cluster around specific issues, and whether your particular combination of property type, size, and location puts you in a high-risk category. The best way to understand that picture is through WhatCanIBuild, which surfaces what's been approved and refused near you — not just the general rules.
What you don't know could cost you £548
The householder application fee in Slough is £548 — and that's non-refundable whether you're approved or not. Submitting without understanding your property's specific constraints is a gamble most homeowners don't need to take. WhatCanIBuild shows you the approval odds for your project type in your area, what nearby decisions looked like, and which constraints are actually live on your property — before you spend a penny on an application.
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