How likely is my planning application to get approved in City of London?

Planning permission in the City of London isn't just complicated — it operates on an entirely different level from almost anywhere else in England. Nearly every street falls within a conservation area, listed building coverage is extensive, and residential permitted development is stripped back to almost nothing. Most homeowners assume they have a rough sense of their chances. They don't — not until they see what applies to your exact address, free, in about a minute.

Your postcode is not enough information

Homeowners often think: I'm in EC2, I've looked up my conservation area, I know the rules. But knowing you're in a conservation area is very different from knowing what that conservation area designation means for your specific project on your specific property. The City Corporation maintains detailed design guidance for each conservation area individually — and what was approved two doors down may not reflect what will happen to your application.

Then there's the listed building question. If your property is listed, or even attached to a listed building, the constraints multiply. Any external alteration — and in many cases internal ones too — may need listed building consent on top of full planning permission. Most homeowners don't realise how far that net can stretch.

The projects that catch people off guard

It's rarely the big projects that surprise people. It's the ones that feel minor. A rooflight. A new front door. Replacing windows. Changes that would sail through in a suburban borough can trigger full applications — and refusals — in the City. The dense mix of commercial and listed contexts means that what counts as "permitted development" elsewhere is simply not permitted here.

And because the City is so small geographically, planning officers and the City Corporation's heritage teams scrutinise applications closely. The design guidance is detailed. The expectations are specific. Getting the framing of an application wrong — even when the project itself is sound — can affect the outcome.

Why approval odds vary even within the same street

Two properties. Same street. Same conservation area. One application approved, one refused. It happens more than people realise — because approval isn't just about the rules, it's about how your specific property's combination of constraints meets your specific proposal. The best way to understand your position is to check how similar projects have fared on properties like yours.

Precedent matters enormously in planning. What's been approved nearby gives officers a benchmark. What's been refused signals where the line is drawn. That data exists — but most homeowners never look at it before they apply.

What you actually need to know before you apply

The £548 application fee is the least of your concerns if an application is refused. A refusal creates a record on your property. It can complicate future applications. And in the City of London, where the bar is high and the scrutiny is real, going in without understanding your actual odds is a significant risk.

WhatCanIBuild pulls together the approval and refusal record for your area, the constraint picture for your specific property, and what that combination actually means for your project type. See the approval record for your street and what it means for your chances — free, no signup needed.