# TN15

Postcode district covering Borough Green, West Kingsdown and Kemsing, in Tonbridge and Malling and Sevenoaks.

TN15 is a postcode district covering Borough Green, West Kingsdown and Kemsing, in Tonbridge and Malling and Sevenoaks. Median sale price £525,000 in 2025.

Postcode district. Code TN15. In: [Postcodes](https://openindex.co.uk/postcode) › [TN](https://openindex.co.uk/postcode/tn)

Approximate outline worked out by Open Index from the ONS Postcode Directory: each census output area belongs to the district that holds most of its postcodes. People, homes, recorded crime and broadband add up those output areas. House sales count every sale with an TN15 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £525,000** (2025). The median price paid for a home in TN15 was £525,000 in 2025. Joint 238th most expensive of 2,235. Source: Worked out by Open Index from HM Land Registry Price Paid Data. Published 28 September 2026. https://openindex.co.uk/postcode/tn15#f-house-sales-median-price
- **Population: 25,680** (2021). TN15 had 25,680 usual residents at the census (ONS Census 2021). 1,133rd most populated of 2,756. Source: Census 2021, England and Wales and Scotland's Census 2022 and Census 2021, Northern Ireland, 2021. Published 21 July 2026. https://openindex.co.uk/postcode/tn15#f-population
- **People in radon Affected Area squares: 78%** (2022). About 78% of people in TN15 live in a 1 km square that the radon atlas marks as a radon Affected Area. UK 44%. Source: Worked out by Open Index from the UKHSA and BGS radon atlas and census output areas. Published 1 December 2022. https://openindex.co.uk/postcode/tn15#f-radon-affected-share
- **Gigabit broadband coverage: 77.4%** (January 2026). In TN15, 77.4% of homes and businesses could get gigabit-capable broadband in January 2026 (Ofcom). UK 87.8%. Source: Connected Nations (Ofcom), January 2026. Published 13 May 2026. https://openindex.co.uk/postcode/tn15#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas#place=TN15) (Worked out by Open Index · 2022): About 78% of people in TN15 live in a 1 km square that the radon atlas marks as a radon Affected Area.
- [Sales per year by postcode district](https://openindex.co.uk/map/house-sales-per-year#place=TN15) (Worked out by Open Index · 2025): 346 homes were sold in TN15 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime#place=TN15) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for TN15.
- [Population by postcode district](https://openindex.co.uk/map/population#place=TN15) (Census 2021, England and Wales): TN15 had 25,680 usual residents at the census.

## How TN15 compares

Each postcode district against every other postcode district the measure covers.

| Measure | TN15 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £525,000 | 6th most expensive | 40 postcode districts, TN · 2025 |
| Population | 25,680 | 10th most populated | 40 postcode districts, TN · 2021 |
| People in radon Affected Area squares | 78% | 5th most people in radon Affected Areas | 40 postcode districts, TN · 2022 |
| Gigabit broadband coverage | 77.4% | 19th highest | 40 postcode districts, TN · Jan 2026 |

## Is TN15 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in TN15 at a rate of 49.8 per 1,000 people.
That compares with 75.6 per 1,000 people across the TN postcode area.
In August 2026 alone, 96 cases of crime and anti-social behaviour were recorded in TN15.
In the 12 months to August 2026, the most common types were violence and sexual offences (529), anti-social behaviour (225) and other crime (212).
A year earlier, the recorded crime rate in TN15 was 55.9 per 1,000 people.
Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.
Rates are per resident, so places that many people work in or visit, such as Westminster, the City of London and other city centres, have far higher rates than their residents alone would suggest.

## Deprivation in TN15, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so TN15 has no single figure. Of its 15 neighbourhoods with a rank:
- Decile 5: 6 neighbourhoods
- Decile 6: 1 neighbourhood
- Decile 7: 3 neighbourhoods
- Decile 8: 1 neighbourhood
- Decile 9: 3 neighbourhoods
- Decile 10 (England’s least deprived 10%): 1 neighbourhood

Source: English Indices of Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in England.

## Neighbourhoods in TN15

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [Sevenoaks 007A](https://openindex.co.uk/sevenoaks/neighbourhood/e01024435) | 1,631 | 55.9 per 1,000 | 5 | 56.9% |
| [Sevenoaks 007B](https://openindex.co.uk/sevenoaks/neighbourhood/e01024436) | 1,484 | 63.0 per 1,000 | 5 | 63.1% |
| [Sevenoaks 007C](https://openindex.co.uk/sevenoaks/neighbourhood/e01024437) | 1,472 | 93.1 per 1,000 | 5 | 53.3% |
| [Sevenoaks 007D](https://openindex.co.uk/sevenoaks/neighbourhood/e01024438) | 1,437 | 23.2 per 1,000 | 6 | 92.5% |
| [Sevenoaks 009A](https://openindex.co.uk/sevenoaks/neighbourhood/e01024448) | 1,312 | 32.7 per 1,000 | 7 | 99.8% |
| [Sevenoaks 009B](https://openindex.co.uk/sevenoaks/neighbourhood/e01024449) | 1,461 | 12.9 per 1,000 | 10 | 94.0% |
| [Sevenoaks 009C](https://openindex.co.uk/sevenoaks/neighbourhood/e01024450) | 1,554 | 40.9 per 1,000 | 7 | 89.4% |
| [Sevenoaks 010A](https://openindex.co.uk/sevenoaks/neighbourhood/e01024457) | 1,299 | 43.1 per 1,000 | 5 | 91.5% |
| [Sevenoaks 012A](https://openindex.co.uk/sevenoaks/neighbourhood/e01024458) | 1,415 | 133.4 per 1,000 | 8 | 82.9% |
| [Tonbridge and Malling 006A](https://openindex.co.uk/tonbridge-and-malling/neighbourhood/e01024723) | 1,621 | 34.2 per 1,000 | 7 | 76.5% |
| [Tonbridge and Malling 006B](https://openindex.co.uk/tonbridge-and-malling/neighbourhood/e01024724) | 2,096 | 39.8 per 1,000 | 9 | 70.8% |
| [Tonbridge and Malling 006C](https://openindex.co.uk/tonbridge-and-malling/neighbourhood/e01024725) | 2,149 | 55.1 per 1,000 | 9 | 80.7% |
| [Tonbridge and Malling 006D](https://openindex.co.uk/tonbridge-and-malling/neighbourhood/e01024726) | 1,886 | 32.0 per 1,000 | 5 | 83.3% |
| [Tonbridge and Malling 006E](https://openindex.co.uk/tonbridge-and-malling/neighbourhood/e01024755) | 2,038 | 29.7 per 1,000 | 9 | 73.3% |
| [Tonbridge and Malling 006F](https://openindex.co.uk/tonbridge-and-malling/neighbourhood/e01024786) | 1,961 | 91.9 per 1,000 | 5 | 82.2% |

## Your MP

- [Tonbridge](https://openindex.co.uk/constituency/tonbridge): Tom Tugendhat (Conservative), MP since July 2024. 55% of the people here.
- [Sevenoaks](https://openindex.co.uk/constituency/sevenoaks): Laura Trott (Conservative), MP since July 2024. 45% of the people here.
- [Gravesham](https://openindex.co.uk/constituency/gravesham): Dr Lauren Sullivan (Labour), MP since July 2024. 0.2% of the people here.

As of 18 October 2026. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.

## Middle areas in TN15

[Borough Green, Wrotham & Shipbourne](https://openindex.co.uk/tonbridge-and-malling/borough-green-wrotham-and-shipbourne), [Kemsing & Otford](https://openindex.co.uk/sevenoaks/kemsing-and-otford), [West Kingsdown](https://openindex.co.uk/sevenoaks/west-kingsdown)

## Postcode sectors in TN15

[TN15 0 (205 postcodes)](https://openindex.co.uk/postcode/tn15-0), [TN15 6 (283 postcodes)](https://openindex.co.uk/postcode/tn15-6), [TN15 7 (172 postcodes)](https://openindex.co.uk/postcode/tn15-7), [TN15 8 (216 postcodes)](https://openindex.co.uk/postcode/tn15-8), [TN15 9 (72 postcodes)](https://openindex.co.uk/postcode/tn15-9)

## Councils TN15 covers

[Tonbridge and Malling](https://openindex.co.uk/tonbridge-and-malling), [Sevenoaks](https://openindex.co.uk/sevenoaks)

## Postcode districts next to TN15

[DA3](https://openindex.co.uk/postcode/da3), [DA4](https://openindex.co.uk/postcode/da4), [DA13](https://openindex.co.uk/postcode/da13), [ME18](https://openindex.co.uk/postcode/me18), [ME19](https://openindex.co.uk/postcode/me19), [TN11](https://openindex.co.uk/postcode/tn11), [TN13](https://openindex.co.uk/postcode/tn13), [TN14](https://openindex.co.uk/postcode/tn14)

## Nearest rail stations

[Borough Green and Wrotham (1.8 km from the middle)](https://openindex.co.uk/map/rail-stations#around=0.3063,51.2932), [Kemsing (2.3 km from the middle)](https://openindex.co.uk/map/rail-stations#around=0.2474,51.2972)

## More in the TN postcode area

[All TN postcode districts](https://openindex.co.uk/postcode/tn), [Every UK postcode area](https://openindex.co.uk/postcode)

## TN15 in brief

TN15 is a postcode district covering Borough Green, West Kingsdown and Kemsing, in Tonbridge and Malling and Sevenoaks.
About 25,986 people lived in TN15 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £525,000 in 2025 across 346 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 49.8 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in TN15 was £525,000 in 2025.
TN15 had 25,680 usual residents at the census.
About 78% of people in TN15 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In TN15, 77.4% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: TN15
- Postcode area: [TN](https://openindex.co.uk/postcode/tn)
- Constituency: [Tonbridge †](https://openindex.co.uk/constituency/tonbridge)
- Council: [Tonbridge and Malling †](https://openindex.co.uk/tonbridge-and-malling)
- Area: 107 km²
- People, mid-2024: 25,986*
- Neighbourhoods: 15
- Output areas: 77

* People: worked out by Open Index from neighbourhood estimates, shared out by where people lived at the census (by area in Northern Ireland). This area's edges do not follow neighbourhood edges, so the figure is close but not exact.
† Best fit: the constituency, council, region and nation this postcode district mostly lies in. Its edges do not follow theirs.

## Next door

[DA3](https://openindex.co.uk/postcode/da3), [TN14](https://openindex.co.uk/postcode/tn14), [TN11](https://openindex.co.uk/postcode/tn11), [DA4](https://openindex.co.uk/postcode/da4), [ME19](https://openindex.co.uk/postcode/me19), [DA13](https://openindex.co.uk/postcode/da13)

## Latest updates for TN15

- August 2026 house prices published: HM Land Registry and partners · Oct 2026.
- September 2026 rent published: ONS private rents · Oct 2026.
- Dental practices updated: NHS England · Oct 2026.
- Schools updated: Ofsted · Oct 2026.

The same figures as JSON: https://openindex.co.uk/v1/places/TN15

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/tn15, or to one figure with its anchor, https://openindex.co.uk/postcode/tn15#f-house-sales-median-price.

Open Index's own text and the figures it works out are licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source data keeps its publishers' licences, named with each figure. Give each figure's period and source with it.

Snapshot 2026.10.10. The HTML page: https://openindex.co.uk/postcode/tn15