How much does planning permission really cost in Kingston upon Thames?

Most homeowners in Kingston upon Thames start with a simple question: what's the fee? The answer — £258 for a householder application — sounds straightforward. It isn't. The fee is just the entry point, and what sits behind it depends almost entirely on your specific property, not on general rules. WhatCanIBuild exists precisely because that gap between the headline number and your actual situation is where things go wrong.

The £258 is just what you pay to be considered

That fee buys you a decision — not an approval. If your application is refused, you don't get it back. If you submit with an incorrect fee, it delays processing. If your local authority fails to determine it within the standard timeframe, you can appeal, but again, no refund. Most homeowners don't realise they can spend that money and walk away with nothing before the real costs even begin.

And then there's the Planning Portal service charge: £75.83 + VAT on top of your application fee for submissions made online where the fee exceeds £100. It's not hidden, but it surprises people.

Where Kingston specifically complicates things

Kingston upon Thames isn't a uniform borough. The areas to the south sit within Green Belt. The town centre and riverside carry conservation and design requirements that don't apply elsewhere. That means two homeowners with the same project — a rear extension, a loft conversion — can face completely different processes depending on which street they're on.

Conservation areas, Article 4 directions, listed building status, flood zones — these aren't just bureaucratic labels. They change what you need to apply for, what supporting documents are required, and in some cases whether permitted development applies at all. Being in one of these designations can mean additional costs: heritage statements, design and access documents, specialist reports. Most homeowners don't realise their property falls under any of these until something goes wrong.

What you can't know from the fee alone

The fee tells you what it costs to apply. It doesn't tell you whether your application is likely to succeed. It doesn't tell you what similar projects on your street have been approved or refused for. It doesn't tell you whether the specific combination of constraints on your property makes your project straightforward or contentious.

That's not information you can find on a fee schedule. It comes from looking at what's actually happened near you — which applications went through, which were knocked back, and what the officer's reasons were. The best way to understand what you're actually walking into is to use WhatCanIBuild, which surfaces that local approval history alongside your property's specific constraints.

Guessing — or assuming your project is simple because the fee is modest — is how homeowners end up paying twice.

So what will it actually cost?

For most householder projects in Kingston upon Thames, you're looking at a minimum of £258 plus the £75.83 + VAT service charge if you apply online. Beyond that, it depends entirely on what your property needs. Pre-application advice, supporting reports, resubmissions — these are all real possibilities that your property's situation will either trigger or not.

WhatCanIBuild shows you what your property's situation actually looks like — the constraints, the local precedents, the approval picture for projects like yours nearby — before you commit to anything.