Croydon is one of London's largest boroughs, which sounds like it should make things simpler — more precedent, more data, more clarity. In reality, it means more variation. The planning rules that apply to a terrace in South Norwood can be completely different from those affecting a semi in Coulsdon, even if the projects look identical. Most homeowners don't realise this until they're already mid-project — or mid-refusal. The best starting point is to see exactly which rules apply to your address before you spend a penny, free, in about a minute.
The short version
- Croydon has conservation areas, Article 4 directions, Green Belt edges, and flood zones — often overlapping
- The rules that apply to your neighbour may not apply to you
- What's been approved nearby tells you far more than the general guidance does
Conservation areas are only the start of the problem
Croydon has conservation areas around Croydon Minster, Addington Village, Coulsdon, South Norwood, Waddon, and more. Being inside one changes what you can do without permission — but most homeowners don't know exactly where the boundaries fall, or which specific works are affected. Some streets sit right on the edge. Others are technically outside but close enough that the character of the area still influences decisions.
And conservation area status is just one layer. Certain areas including parts of Shirley, Coulsdon, and Upper Norwood also have Article 4 Directions in place. These remove permitted development rights that would otherwise apply — meaning work you'd normally do without any permission at all suddenly requires a full application. Most homeowners only find out about this after the fact.
The southern fringe adds a whole other dimension
The south of Croydon borders both Green Belt land and the Surrey Hills National Landscape (formerly AONB). In areas like the Biggin Hill and Kenley fringe, Article 2(3) designated land rules apply — and these trigger additional restrictions that simply don't exist in the rest of the borough. A project that would sail through in CR0 could face serious scrutiny in CR5 or CR8, even if it looks identical on paper.
If your property sits near — or on — that southern edge, the best way to know whether those rules affect your specific plot is to check how your location's constraint mix has played out for similar projects.
Flood zones
The Wandle valley runs through parts of Croydon and brings flood zone designations with it. If your property sits near the river corridor, additional checks apply before certain works can proceed — and this isn't always visible from the outside.
Why what happened next door isn't a reliable guide
This is the one that catches people most often. A neighbour gets an extension approved, you assume the same project will go the same way, and then it doesn't. Maybe your plot sits inside a conservation area boundary and theirs doesn't. Maybe they applied before an Article 4 Direction was introduced. Maybe your side of the street has a different flood risk designation. Planning decisions in Croydon are made property by property — the address matters more than the project type.
General guidance about permitted development or householder rights tells you how the system works in theory. It doesn't tell you what Croydon Council has actually approved and refused on your street, or how your particular combination of constraints has affected outcomes for projects like yours. That's the gap that costs homeowners time, money, and a £548 application fee when things go wrong.
WhatCanIBuild is built for exactly this — see the approval record for your street and what it means for your odds, free, no signup needed.
These rules vary by property
Conservation areas, Article 4 directions, and other constraints can change everything. Check what actually applies to your address.
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