Land by postcode · TN area · Westerham
Westerham covers the TN16 postcode district, in Greater London. Planning applications here are split between 3 planning authorities: Bromley, Sevenoaks and Tandridge. Below: what homes sold for, which planning controls apply, and what that means before you sell or develop a plot in Westerham.
Residential sales recorded by HM Land Registry between 2024-08 and 2026-07 across the TN16 district. This is market context for the town, not a land valuation: what a plot is worth depends on what can be built on it, which these figures do not show.
Sales in 24 months
505
Median sale price
£470,000
Median £ per m² of floor area
£5,267
Median, last 12m vs prior 12m
+2.2%
£465,000 → £475,000
Mix of sales: 35% detached, 25% semi-detached, 25% terraced, 16% flats.
New-build sales 2023–2024: 11 of 473 (2%). A rough proxy for recent building activity: these are homes sold by builders, not development sites.
For each designation on the planning.data.gov.uk register, the share of the 617 live postcodes in TN16 whose centroid falls inside it. This measures postcodes, not land area, and says nothing about any individual plot.
222 of 617 postcodes
258 of 617 postcodes
Kent Downs · Surrey Hills
4 of 617 postcodes
Biggin Hill RAF Station · COA00000506 · COA00000182
No postcodes in TN16 fall inside: National Park, Article 4 Direction area.
Flood zones, tree preservation orders, local plan allocations, settlement boundaries and non-designated heritage are not included here and are checked in a full assessment.
36% of postcodes in Westerham are inside the Green Belt, so Westerham has land both inside and outside it. Which side of the boundary a plot sits on determines whether the Green Belt tests apply to it at all.
42% of postcodes are inside a National Landscape (AONB). In those areas national policy gives great weight to conserving landscape and scenic beauty, and major development is expected only in exceptional circumstances.
These are town-level facts. The free assessment checks your actual boundary against the same registers and the local plan and tells you plainly what they mean for your plot.
Decided planning applications in Westerham since 2021, from the council registers, grouped by the kind of scheme a landowner might be weighing up. Extensions, conditions and tree works are left out. Counts, not estimates.
Taken from the units table on the planning form itself, so this is homes actually created, not a reading of the description. 5 decided since 2021, 4 refused.
1 of 5
approved, 20%
48% across London
1 homes approved of 6 applied for
Approved examples
157 Main Road, Biggin Hill (1 new home)
Change of use from bathroom sales to Class C3 residential dwellinghouse with elevational alterations, associated refuse and cycle storage.
Approved 2024-12-23, Bromley ref 24/04057/FULL2
By the kind of plot, from the wording of each proposal:
3 decided since 2021, 3 refused
0 of 3
approved
45% across London
Also decided here: 3 applications for outbuildings, annexes or garden buildings, 2 approved.
Decided planning applications (not extensions, conditions or tree works) from the councils' own registers, summed across the 1 of 1 postcode districts in Westerham that carry them, classified by the wording of each proposal. Counts, not estimates; within a district, a class with fewer than three applications is not counted.
Westerham is split between planning authorities: Bromley (49% of sampled postcodes), Sevenoaks (39%), Tandridge (13%).
Borough guide: Selling land in Bromley
Draw your boundary, tell us what you own, and an architect checks it against these registers and the local plan. Free, no obligation, and you get a straight written answer.
It depends on where the plot sits, not on the town average. Across Westerham, 36% of postcodes are in the Green Belt, 42% in a National Landscape and 1% in a conservation area. on Green Belt or National Landscape plots a new home is the exception and needs a specific case, and a replacement dwelling, a conversion or a modest extension is usually the realistic route. Outside those designations the questions that decide it are whether the plot is inside or adjoining the settlement boundary in the local plan, whether it has its own road access, and what is next to it.
No Article 4 direction is recorded for Westerham, so houses keep their normal permitted development rights for outbuildings and extensions within the size limits. Those rights do not extend to agricultural land, paddocks or a change of use to residential, which normally need permission or prior approval.
Developers look at three things before they talk about price: whether the plot is outside the Green Belt and any National Landscape, whether it sits inside or beside the settlement boundary, and what finished homes sell for. In Westerham the median sale is £470,000, and only 2% of 2023–2024 sales were new-build homes, so builders have been quiet here. A single plot usually goes to a local builder or a self-builder; a site for five or more homes attracts regional housebuilders, normally through an option or a conditional contract rather than an outright purchase, so the price you see quoted is not the price you receive.
There is no town figure for land, because a plot's value comes from what can be built on it, not from where it is. As a guide, a serviced plot with consent for one house commonly sells for around a third of the finished house value, which in Westerham would be measured against a £470,000 median sale. The same plot without consent, or inside the Green Belt, is worth a small fraction of that, and a paddock with no realistic route to consent is worth agricultural or amenity value only. The free check tells you which of those your plot is before you talk to anyone about a price.
Computed from open-data records; town-level, not plot-level measurements. Westerham here means the postcode district whose most common post town is Westerham. Sales: HM Land Registry Price Paid Data (2024-08-01 to 2026-07-31), © Crown copyright, Open Government Licence. Designations: planning.data.gov.uk (OGL); conservation areas and Article 4 directions are made locally and published on that national register. Postcode centroids: OS Code-Point Open, contains OS data © Crown copyright and database right 2026. Figures computed 2026-10-19.