The headline fee for a householder application in Sevenoaks is £548. Most homeowners see that number and think they've budgeted for planning. They haven't. The real cost depends on your property, your street, and a tangle of local constraints that most people don't discover until they're already mid-project. WhatCanIBuild exists precisely because the gap between 'the fee' and 'what this will actually cost me' is bigger than most people expect.
The short version
- The council fee is £548 for a standard householder application
- A £75.83 +VAT service charge applies to online submissions with fees over £100
- AONBs, Article 4 directions, and 1,659 listed buildings mean Sevenoaks has more complexity than most districts
- What it costs you depends entirely on your specific property
The fee is just one line item
The £548 application fee is fixed. But if you're submitting online, add a £75.83 +VAT service charge on top. Then there's pre-application advice — some homeowners pay for this, some skip it and pay later in delays and refusals. Depending on your project, you might also need a heritage statement, a design and access statement, an ecological survey, or a flood risk assessment. None of that is included in the £548.
Most homeowners don't realise how quickly these supporting documents add up — or which ones apply to their specific address.
Sevenoaks isn't a typical district
Sevenoaks borders both the High Weald and Kent Downs AONBs. Properties on or near that land sit within what's called Article 1(5) land, where permitted development rights are already restricted before any Article 4 direction even enters the picture. That means work you'd assume doesn't need permission — might.
Then there are the 1,659 listed buildings across the district. If your property is listed, or close to one, that changes what you need to submit and what it costs. Listed building consent applications carry no fee, but the professional costs around them — specialists, consultants, heritage advisors — absolutely do.
Conservation areas add another layer. Sevenoaks has several, and being inside one affects what you can do under permitted development. Whether your specific project crosses that line depends on details most homeowners don't have.
Don't assume your neighbours' experience applies to you
Even on the same street, two properties can face completely different rules depending on when they were built, their curtilage, and whether they've had prior extensions. What sailed through for next door might require full permission — or be refused — for yours.
The hidden cost of getting it wrong
A refused application costs you the same fee as an approved one — and it doesn't come back. Withdraw your application before determination and the fee is also gone. That's before you factor in time: the standard determination window is 8 weeks, and complex applications in sensitive areas often run longer.
The expensive surprises usually come from not knowing which constraints apply before you start. An extension that looks like a simple householder job can become a heritage consultation, a pre-application meeting, and two rounds of amended drawings — none of which showed up in the original £548 estimate.
What your property actually means for your project
The best way to understand your real exposure isn't to read the fee schedule — it's to check what's actually happened to properties like yours in Sevenoaks. WhatCanIBuild shows you what's been approved and refused nearby, what similar projects on your street actually cost to get through, and how your property's specific combination of constraints affects your chances — not the district average, your address.
That's the number most homeowners wish they'd known at the start.
WhatCanIBuild pulls together the approval history, constraint picture, and local patterns for your specific postcode — so you're not budgeting blind.
Want a detailed planning report?
Get a personalised report covering constraints, precedents, and approval odds for your project.
See a sample report