Most homeowners in Westminster start by googling the application fee. They find the £258 householder figure, feel reassured, and move on. What they don't realise is that the fee is often the smallest line on the bill — and the least complicated part of the process. If you want to understand what your project is actually likely to cost, WhatCanIBuild gives you a clearer picture based on your specific address.
The short version
- The standard householder planning application fee in Westminster is £258
- Westminster is almost entirely covered by conservation areas and Article 4 directions — which change what's possible and what it costs to find out
- The real cost includes professional fees, pre-application advice, and the risk of getting it wrong
The £258 fee is just the beginning
Yes, the statutory application fee for a householder application is £258. But that number tells you almost nothing about what you'll actually spend.
There's also a Planning Portal service charge of £75.83 + VAT on applications submitted online that attract a fee over £100. Then there are the costs that don't appear on any fee schedule: architect drawings, planning consultants, pre-application advice meetings with the council, and — in some cases — specialist reports that Westminster may require before they'll even look at your proposal.
None of those are optional if your property or your project triggers them. And in Westminster, a lot of properties do.
Westminster isn't like other boroughs
Almost the entire borough sits within a conservation area. On top of that, Article 4 directions are widespread — meaning works that would be permitted development almost anywhere else in England require a full planning application here. Changes to front elevations, replacement windows, external materials — things homeowners assume they can just do — can require permission on specific streets, or for specific property types, in ways that have nothing to do with how big or ambitious the project is.
Then there are listed buildings. Westminster has a significant concentration of them. If your property is listed — or even if you're not sure whether it is — the rules, the process, and the costs shift considerably. Listed building consent is a separate application, with its own requirements and its own professional support needs.
Most homeowners don't realise how many of these layers can stack on a single address. WhatCanIBuild shows you the combination of constraints on your specific property — and crucially, what similar projects nearby have actually been approved or refused, and why.
Don't assume permitted development applies
In Westminster, Article 4 directions remove permitted development rights across large parts of the borough. A project that needs no permission in another London borough may need full planning permission on your street.
The cost of getting it wrong
A refused application doesn't get a refund. If your application is withdrawn before a decision, the fee isn't returned either. That's £258 gone — plus whatever you spent on drawings and advice to get the application ready.
More expensive is the cost of starting work without permission when you needed it. Enforcement action, retrospective applications, and the professional fees involved in unwinding an unlawful build can dwarf the original project budget. In a conservation area with active enforcement — which Westminster is — that's not a theoretical risk.
The typical decision time is 8 weeks, but that clock doesn't start until the application is valid. If there are issues with what you've submitted, the delays compound. And if neighbouring objections or heritage concerns complicate the process, 8 weeks can stretch considerably.
What your property actually faces
The best way to understand what your project will cost — in fees, professional support, and realistic odds of approval — is to look at what's actually happened on properties like yours. WhatCanIBuild pulls together the planning history near your address, the constraints on your specific property, and the approval patterns for your project type, so you're not guessing at a number that could be very wrong.
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