Camden is one of the most planning-complex boroughs in London. With over 40 conservation areas, widespread Article 4 directions, and streets where the rules vary property by property, what your neighbour got away with may have nothing to do with what you're allowed to do. WhatCanIBuild exists precisely because this stuff isn't simple to untangle on your own.
The short version
- Camden has over 40 conservation areas — and many have Article 4 directions that remove standard permitted development rights
- Being in a conservation area doesn't tell you what's actually allowed for your specific project
- Rules can differ between properties on the same street
Permitted development isn't a free pass in Camden
Most homeowners start with the assumption that certain projects don't need planning permission. That's not wrong — permitted development rights do allow some work without a formal application. But those rights can be, and frequently are, removed in Camden.
Article 4 directions are the mechanism councils use to withdraw permitted development rights in areas they want to protect. Camden has them in place across significant parts of the borough — Hampstead, Belsize Park and Bloomsbury among them. If your property sits within one of those directions, work you assumed was automatic could require a full planning application.
Most homeowners don't realise this until after they've started.
Conservation areas: knowing you're in one isn't enough
Camden's conservation areas cover a huge portion of the borough. If you live in NW3, NW1, WC1 or parts of N6, there's a reasonable chance your property is affected.
But here's what catches people out: being in a conservation area is just the beginning of the question, not the answer. The specific constraints vary by area, by street, and sometimes by individual property. What was approved two doors down last year may have nothing to do with your chances — because the character of your plot, your elevation, your roof type, your relationship to the street all factor in.
Knowing you're in a conservation area tells you to be careful. It doesn't tell you what careful looks like for your project.
Listed buildings
If your property is listed — or even adjacent to one — the rules change again, in ways that go well beyond standard planning guidance. Pre-application advice from Camden Council is strongly recommended before any work begins.
What similar projects on your street actually got
This is where most homeowners are flying completely blind. Planning decisions in Camden are a matter of public record, but making sense of what was approved, what was refused, and — crucially — why is a different challenge entirely.
Two identical extensions on the same road can have opposite outcomes based on factors the homeowner never considered. Precedent matters. Officer interpretation matters. The specific combination of constraints on your plot matters.
Camden Council recommends pre-application advice for properties in conservation areas, and for good reason — but that process takes time, and it still doesn't give you a clear picture of your approval odds before you've committed to anything.
WhatCanIBuild is the best way to understand what's been approved and refused for projects like yours, on streets like yours, and what your specific combination of constraints actually means for your chances — not just in theory, but in practice.
The risk of guessing
Planning enforcement in Camden is active. Unauthorised work — even work that would have been approved with the right application — can result in enforcement notices, required demolition, and complications when you come to sell. The householder application fee is £258. That's a small number compared to what getting it wrong costs.
The best way to know where you actually stand — before you speak to an architect, before you start any work — is to check your specific property. WhatCanIBuild shows you what the rules mean for your address: what's been approved nearby, what's been refused, and what your approval odds look like given everything that applies to your plot.
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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