Most homeowners in Bromley assume planning permission is either a formality or a lottery. The reality is somewhere more unsettling: your odds depend on a specific combination of factors tied to your exact property, your street, and what's happened nearby — and most people don't know what that combination looks like until they've already paid £548 and waited eight weeks.
Before you assume your project is straightforward, it's worth seeing what constraints and approval patterns apply to your specific address — free, takes about a minute.
The short version
- Bromley is one of London's largest boroughs — but rules vary dramatically across it
- Green Belt, conservation areas, and listed building status each change your odds in different ways
- What got approved on one street can mean nothing for the house three roads away
Bromley isn't one place — it's dozens
BR1 in Bromley town centre is a completely different planning environment from BR6 out near Orpington, or the rural pockets around Biggin Hill and Downe. Bromley has substantial Green Belt land in the south and east, and that designation alone reshapes what's possible — not just whether you need permission, but how tightly your application will be scrutinised.
Conservation areas in Keston, Chislehurst, Shortlands, Farnborough Village, and Hayes each carry their own local character assessments and design expectations. Being inside one doesn't automatically mean refusal — but it does mean the bar is different. Whether your project clears that bar depends on specifics most homeowners don't discover until it's too late.
The exceptions that catch people out
Listed buildings cluster around Down House, Chislehurst, and Farnborough. If your home is listed — or even in the curtilage of a listed building — the rules shift significantly. Many homeowners don't realise their property is affected until they're already mid-application.
Article 4 Directions can remove permitted development rights that you'd otherwise take for granted. Green Belt locations add a further layer: tight restrictions on extension size and outbuilding coverage mean projects that would sail through in, say, SE20 might face real resistance near the North Downs.
The question isn't just whether you're in one of these zones — it's what your particular combination of constraints means for your project type. That's where most people get stuck, and checking how that constraint mix has played out for similar projects nearby is the only way to get a real read on your position.
Don't assume permitted development covers you
Bromley properties in Green Belt, conservation areas, or with Article 4 Directions may have had permitted development rights removed. What's allowed for your neighbour may not be allowed for you.
Why past approvals on your street matter
Planning decisions in Bromley — like everywhere — aren't made in a vacuum. What's been approved and refused nearby creates a pattern, and that pattern matters. A run of approvals for rear extensions on your road is meaningful context. So is a cluster of refusals for the same project type two streets over.
Most homeowners don't have access to that picture when they're deciding whether to apply. They're guessing based on what their neighbour did, or what a builder told them, or a general sense that "it should be fine." That's a risky basis for a £548 application and an eight-week wait.
WhatCanIBuild pulls together the approval record for your area so you're not going in blind. Before you commit to an application, see the approval record for your street and what it means for your odds — free, no signup needed.
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