How much does planning permission really cost in City of London?

Most homeowners ask about the fee. That's the wrong question. The fee is fixed. What's genuinely unpredictable is everything else — and in the City of London, there's a lot of everything else. WhatCanIBuild exists precisely because the fee is the one part that's simple.

The £258 is just the starting point

Yes, the standard householder application fee is £258. Submit online through the Planning Portal and you'll also pay a service charge of £75.83 +VAT on top of that. So far, so straightforward.

But here's what most homeowners don't realise: fees don't change based on how complicated your project is, how many constraints apply to your property, or how likely your application is to succeed. You pay the same whether your application sails through or gets refused. And in the City of London, refusal is a very real outcome worth thinking about before you spend anything.

The City of London is unlike anywhere else

The City of London is predominantly commercial. Residential properties exist here, but they are the exception — and that shapes how the planning authority approaches every application. Nearly the entire area falls within a conservation area. That's not a detail. That's a fundamental constraint that affects what you can do, how it needs to look, and what evidence you'll need to submit.

Then there are Article 4 directions. These are borough-specific rules that remove permitted development rights that homeowners elsewhere take for granted. Whether your specific property is affected depends on exactly where it sits — not just which postcode, but sometimes which side of a street.

And if your building is listed? The fee picture changes entirely. Listed building consent carries no application fee, but the process, the scrutiny, and the risk of refusal are in a different category altogether.

The costs you won't find on a fee schedule

Pre-application advice. Heritage statements. Design and access statements. Specialist surveys. These are the costs that vary by project, by property, and by how complex your constraints turn out to be. None of them are on the fee calculator. All of them can dwarf the application fee itself.

Most homeowners budget for the fee and forget about everything else. Then they encounter a request for additional documentation, or discover mid-process that their property sits within a layer of restrictions they hadn't accounted for. The typical decision time is 8 weeks — but that clock doesn't start until your application is validated, and validation requires the right supporting documents from the beginning.

What you actually need to know before you spend anything

The best way to understand what your project is really up against isn't to read the fee schedule — it's to know what's been approved and refused on your street, how similar projects in your area have fared, and what your property's specific combination of constraints actually means for your chances. That's what WhatCanIBuild shows you: not just whether you're in a conservation area, but what that has meant in practice for projects like yours.

The fee is £258. Whether paying it makes sense for your specific project on your specific property in the City of London is a different question entirely — and one worth answering first.

WhatCanIBuild gives you the picture your address actually reveals, not the general rules that may or may not apply to you.