# Longfield, New Ash Green and Hartley

Town in Sevenoaks and Dartford, South East.

Longfield, New Ash Green and Hartley is a town in Sevenoaks and Dartford, South East. Median sale price £465,000 in 2025. Recorded crime 60.4 per 1,000 people.

Town. Code E63005155. In: [Towns](https://openindex.co.uk/places/towns) › [Sevenoaks](https://openindex.co.uk/sevenoaks)

Longfield, New Ash Green and Hartley is an ONS built-up area: the land built up as one town, whatever council it is in. Figures for Longfield, New Ash Green and Hartley add up the census output areas (or, for claimants, the neighbourhoods) that sit mostly inside it, so they are close to, but not exactly, the town’s own.

## Key figures

- **Median sale price: £465,000** (2025). The median price paid for a home in Longfield, New Ash Green and Hartley was £465,000 in 2025. Joint 103rd most expensive of 1,092. Source: Worked out by Open Index from HM Land Registry Price Paid Data. Published 28 September 2026. https://openindex.co.uk/town/longfield-new-ash-green-and-hartley#f-house-sales-median-price
- **Population: 16,077** (2021). Longfield, New Ash Green and Hartley had 16,077 usual residents at the census (ONS Census 2021). 558th least populated of 1,209. 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/town/longfield-new-ash-green-and-hartley#f-population
- **People in radon Affected Area squares: 96%** (2022). About 96% of people in Longfield, New Ash Green and Hartley 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/town/longfield-new-ash-green-and-hartley#f-radon-affected-share
- **Gigabit broadband coverage: 69.5%** (January 2026). In Longfield, New Ash Green and Hartley, 69.5% 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/town/longfield-new-ash-green-and-hartley#f-gigabit-coverage

## On the map

- [Radon Affected Area by town](https://openindex.co.uk/map/radon-affected-areas?place=E63005155) (Worked out by Open Index · 2022): About 96% of people in Longfield, New Ash Green and Hartley live in a 1 km square that the radon atlas marks as a radon Affected Area.
- [Sales per year by town](https://openindex.co.uk/map/house-sales-per-year?place=E63005155) (Worked out by Open Index · 2025): 271 homes were sold in Longfield, New Ash Green and Hartley in 2025.
- [Crime and ASB by town](https://openindex.co.uk/map/recorded-crime?place=E63005155) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for Longfield, New Ash Green and Hartley.
- [Population by town](https://openindex.co.uk/map/population?place=E63005155) (Census 2021, England and Wales): Longfield, New Ash Green and Hartley had 16,077 usual residents at the census.

## How Longfield, New Ash Green and Hartley compares

Each town against every other town the measure covers.

| Measure | Longfield, New Ash Green and Hartley | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £465,000 | 54th most expensive | 209 towns, South East · 2025 |
| Population | 16,077 | 93rd least populated | 209 towns, South East · 2021 |
| People in radon Affected Area squares | 96% | joint 44th most people in radon Affected Areas | 209 towns, South East · 2022 |
| Gigabit broadband coverage | 69.5% | 6th lowest | 209 towns, South East · Jan 2026 |

## Is Longfield, New Ash Green and Hartley safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Longfield, New Ash Green and Hartley at a rate of 60.4 per 1,000 people.
That compares with 81.3 per 1,000 people across South East.
Across England as a whole, the recorded crime rate was 96.3 per 1,000 people.
In August 2026 alone, 70 cases of crime and anti-social behaviour were recorded in Longfield, New Ash Green and Hartley.
In the 12 months to August 2026, the most common types were violence and sexual offences (241), anti-social behaviour (224) and shoplifting (193).
A year earlier, the recorded crime rate in Longfield, New Ash Green and Hartley was 58.6 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 Longfield, New Ash Green and Hartley, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so Longfield, New Ash Green and Hartley has no single figure. Of its 11 neighbourhoods with a rank:
- Decile 3: 1 neighbourhood
- Decile 4: 1 neighbourhood
- Decile 5: 1 neighbourhood
- Decile 6: 1 neighbourhood
- Decile 7: 1 neighbourhood
- Decile 8: 2 neighbourhoods
- 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 Longfield, New Ash Green and Hartley

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [Dartford 013B](https://openindex.co.uk/dartford/neighbourhood/e01024158) | 2,034 | 177.6 per 1,000 | 7 | 92.0% |
| [Dartford 013C](https://openindex.co.uk/dartford/neighbourhood/e01024159) | 1,578 | 36.7 per 1,000 | 8 | 47.1% |
| [Dartford 013D](https://openindex.co.uk/dartford/neighbourhood/e01024160) | 1,416 | 47.9 per 1,000 | 9 | 61.9% |
| [Sevenoaks 004A](https://openindex.co.uk/sevenoaks/neighbourhood/e01024441) | 1,559 | 25.3 per 1,000 | 9 | 54.6% |
| [Sevenoaks 004B](https://openindex.co.uk/sevenoaks/neighbourhood/e01024442) | 1,549 | 35.5 per 1,000 | 8 | 40.4% |
| [Sevenoaks 004C](https://openindex.co.uk/sevenoaks/neighbourhood/e01024443) | 1,522 | 25.7 per 1,000 | 10 | 35.6% |
| [Sevenoaks 004D](https://openindex.co.uk/sevenoaks/neighbourhood/e01024444) | 1,301 | 63.2 per 1,000 | 3 | 49.8% |
| [Sevenoaks 016A](https://openindex.co.uk/sevenoaks/neighbourhood/e01024413) | 1,608 | 90.0 per 1,000 | 4 | 85.2% |
| [Sevenoaks 016B](https://openindex.co.uk/sevenoaks/neighbourhood/e01024414) | 1,601 | 41.2 per 1,000 | 6 | 90.5% |
| [Sevenoaks 016C](https://openindex.co.uk/sevenoaks/neighbourhood/e01024415) | 1,306 | 25.3 per 1,000 | 9 | 99.1% |
| [Sevenoaks 016D](https://openindex.co.uk/sevenoaks/neighbourhood/e01032619) | 1,554 | 42.1 per 1,000 | 5 | 77.9% |

## Your MP

- [Tonbridge](https://openindex.co.uk/constituency/tonbridge): Tom Tugendhat (Conservative), MP since July 2024.

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

## Councils Longfield, New Ash Green and Hartley sits in

[Sevenoaks](https://openindex.co.uk/sevenoaks), [Dartford](https://openindex.co.uk/dartford)

## Postcode districts covering Longfield, New Ash Green and Hartley

[DA3](https://openindex.co.uk/postcode/da3)

## Middle areas in Longfield, New Ash Green and Hartley

[Hartley & Hodsoll Street](https://openindex.co.uk/sevenoaks/hartley-and-hodsoll-street), [Longfield, New Barn & Southfleet](https://openindex.co.uk/dartford/longfield-new-barn-and-southfleet), [New Ash Green](https://openindex.co.uk/sevenoaks/new-ash-green)

## Towns near Longfield, New Ash Green and Hartley

[Northfleet](https://openindex.co.uk/town/northfleet), [Gravesend](https://openindex.co.uk/town/gravesend), [Dartford](https://openindex.co.uk/town/dartford), [Swanscombe](https://openindex.co.uk/town/swanscombe), [Tilbury](https://openindex.co.uk/town/tilbury), [Swanley](https://openindex.co.uk/town/swanley)

## Longfield, New Ash Green and Hartley in brief

Longfield, New Ash Green and Hartley is a town in Sevenoaks and Dartford, South East.
About 16,198 people lived in Longfield, New Ash Green and Hartley in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £465,000 in 2025 across 271 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 60.4 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in Longfield, New Ash Green and Hartley was £465,000 in 2025.
Longfield, New Ash Green and Hartley had 16,077 usual residents at the census.
About 96% of people in Longfield, New Ash Green and Hartley live in a 1 km square that the radon atlas marks as a radon Affected Area.
In Longfield, New Ash Green and Hartley, 69.5% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Town
- Code: E63005155
- Constituency: [Tonbridge †](https://openindex.co.uk/constituency/tonbridge)
- Council: [Sevenoaks †](https://openindex.co.uk/sevenoaks)
- Region: [South East](https://openindex.co.uk/south-east)
- Nation: [England](https://openindex.co.uk/england)
- Area: 6.49 km²
- People, mid-2024: 16,198*
- Neighbourhoods: 11
- Output areas: 51

* 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 and council this town mostly lies in. Its edges do not follow theirs.

## Next door

[Northfleet](https://openindex.co.uk/town/northfleet), [Gravesend](https://openindex.co.uk/town/gravesend), [Dartford](https://openindex.co.uk/town/dartford), [Swanscombe](https://openindex.co.uk/town/swanscombe), [Tilbury](https://openindex.co.uk/town/tilbury), [Swanley](https://openindex.co.uk/town/swanley)

## Latest updates for Longfield, New Ash Green and Hartley

- 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/E63005155

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/town/longfield-new-ash-green-and-hartley, or to one figure with its anchor, https://openindex.co.uk/town/longfield-new-ash-green-and-hartley#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 2026.10.9. The HTML page: https://openindex.co.uk/town/longfield-new-ash-green-and-hartley