Planning applications get refused in Sevenoaks every week — and most of the time, the homeowner didn't see it coming. With AONBs, listed buildings, and a patchwork of local designations across TN13, TN14, TN15, TN8 and beyond, what's straightforward in one postcode can be a refusal waiting to happen in another. WhatCanIBuild exists precisely because knowing the general rules isn't the same as knowing what applies to your property.
The short version
- Sevenoaks has over 1,659 listed buildings and sits within or beside two AONBs — both significantly restrict what's possible
- Refusals often come down to issues homeowners didn't know existed on their property
- The rules that apply to your neighbour's house may not apply to yours
"It doesn't fit in with the area" — and why that's harder to predict than it sounds
One of the most frequent reasons for refusal across Sevenoaks is harm to the character and appearance of the surrounding area. But what counts as harmful? That depends on which street you're on, what your neighbours have already built, and whether your property sits within a designated landscape. The Kent Downs and High Weald AONBs cover significant parts of the district — and properties in or near those areas face tighter scrutiny than those outside. Most homeowners don't realise their plot is on Article 1(5) land until after they've submitted.
Conservation areas, listed buildings, and the constraints you can't see on a map
Sevenoaks has more listed buildings than most people expect — over 1,600 of them. If your property is listed, or even just adjacent to one, the bar for approval shifts considerably. Conservation areas add another layer entirely. But it's not just about being in a conservation area — it's about what your specific proposal does within it. Two extensions on the same street can get completely different decisions. The planning history of your plot, what's been refused nearby, and how your application is framed all feed into the outcome in ways that aren't obvious from the outside.
Don't assume permitted development protects you
In parts of Sevenoaks, permitted development rights are restricted through Article 4 directions and Article 1(5) land designations. Work you might assume doesn't need permission could still require a full application — and still get refused.
Scale, overlooking, and the objections that quietly sink applications
Overbearing impact. Loss of light. Overlooking. These grounds for refusal are raised constantly in Sevenoaks, and they're notoriously difficult to predict without knowing what's already been approved on your road. An extension that sailed through three doors down might be refused on your plot because of a different boundary relationship, a different roof line, or a different neighbour. Most applicants focus on what they want to build — not on how the specific geometry of their property affects the outcome.
What actually gives you an accurate picture
The best way to understand your real chances isn't to read planning guidance — it's to see what's actually been approved and refused for properties like yours, in your specific location, with your specific constraints. WhatCanIBuild analyses planning decisions near your address so you can see the patterns that matter: which project types get refused, what reasons come up repeatedly, and how your property's combination of designations affects your odds. That's the information that changes whether you submit — and how.
With a £548 fee on the line and an 8-week wait, submitting without that picture is a gamble most homeowners regret. WhatCanIBuild gives you the local intelligence before you commit.
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