# KT21 Postcode district covering Ashtead, in Mole Valley. KT21 is a postcode district covering Ashtead, in Mole Valley. Median sale price £720,000 in 2025. Recorded crime 30.1 per 1,000 people. About 14,001 people. Postcode district. Code KT21. In: [Postcodes](https://openindex.co.uk/postcode) › [KT](https://openindex.co.uk/postcode/kt) 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 KT21 postcode. [How census figures are added up](https://openindex.co.uk/sources/population) ## Key figures - **Median sale price: £720,000** (2025). The median price paid for a home in KT21 was £720,000 in 2025. Joint 68th 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/kt21#f-house-sales-median-price - **Population: 13,951** (2021). KT21 had 13,951 usual residents at the census (ONS Census 2021). 946th least 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/kt21#f-population - **People in radon Affected Area squares: 57%** (2022). About 57% of people in KT21 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/kt21#f-radon-affected-share - **Gigabit broadband coverage: 87.0%** (January 2026). In KT21, 87.0% 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/kt21#f-gigabit-coverage ## On the map - [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas?place=KT21) (Worked out by Open Index · 2022): About 57% of people in KT21 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=KT21) (Worked out by Open Index · 2025): 159 homes were sold in KT21 in 2025. - [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime?place=KT21) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for KT21. - [Population by postcode district](https://openindex.co.uk/map/population?place=KT21) (Census 2021, England and Wales): KT21 had 13,951 usual residents at the census. ## How KT21 compares Each postcode district against every other postcode district the measure covers. | Measure | KT21 | Rank | Compared with | | --- | --- | --- | --- | | Median sale price | £720,000 | 5th most expensive | 24 postcode districts, KT · 2025 | | Population | 13,951 | 4th least populated | 24 postcode districts, KT · 2021 | | People in radon Affected Area squares | 57% | 6th most people in radon Affected Areas | 24 postcode districts, KT · 2022 | | Gigabit broadband coverage | 87.0% | 6th lowest | 24 postcode districts, KT · Jan 2026 | ## Is KT21 safe? What police records show In the 12 months to August 2026, police recorded crimes and anti-social behaviour in KT21 at a rate of 30.1 per 1,000 people. That compares with 73.8 per 1,000 people across the KT postcode area. In August 2026 alone, 34 cases of crime and anti-social behaviour were recorded in KT21. In the 12 months to August 2026, the most common types were violence and sexual offences (161), other crime (91) and anti-social behaviour (48). A year earlier, the recorded crime rate in KT21 was 36.4 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 KT21, neighbourhood by neighbourhood - Deprivation is ranked by neighbourhood, so KT21 has no single figure. Of its 10 neighbourhoods with a rank: - Decile 8: 1 neighbourhood - Decile 9: 1 neighbourhood - Decile 10 (England’s least deprived 10%): 8 neighbourhoods Source: English Indices of Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in England. ## Neighbourhoods in KT21 | Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband | | --- | --- | --- | --- | --- | | [Mole Valley 001A](https://openindex.co.uk/mole-valley/neighbourhood/e01030506) | 1,324 | 14.0 per 1,000 | 10 | 100.0% | | [Mole Valley 001B](https://openindex.co.uk/mole-valley/neighbourhood/e01030508) | 1,444 | 19.9 per 1,000 | 10 | 85.5% | | [Mole Valley 001C](https://openindex.co.uk/mole-valley/neighbourhood/e01030509) | 1,208 | 30.3 per 1,000 | 8 | 70.3% | | [Mole Valley 001D](https://openindex.co.uk/mole-valley/neighbourhood/e01030513) | 1,434 | 36.2 per 1,000 | 10 | 98.1% | | [Mole Valley 001E](https://openindex.co.uk/mole-valley/neighbourhood/e01030514) | 1,493 | 46.9 per 1,000 | 10 | 85.2% | | [Mole Valley 002A](https://openindex.co.uk/mole-valley/neighbourhood/e01030505) | 1,572 | 40.6 per 1,000 | 9 | 91.1% | | [Mole Valley 002B](https://openindex.co.uk/mole-valley/neighbourhood/e01030507) | 1,277 | 40.6 per 1,000 | 10 | 92.7% | | [Mole Valley 002C](https://openindex.co.uk/mole-valley/neighbourhood/e01030511) | 1,598 | 16.9 per 1,000 | 10 | 86.7% | | [Mole Valley 002D](https://openindex.co.uk/mole-valley/neighbourhood/e01030512) | 1,607 | 27.8 per 1,000 | 10 | 84.3% | | [Mole Valley 004A](https://openindex.co.uk/mole-valley/neighbourhood/e01030510) | 1,875 | 26.7 per 1,000 | 10 | 80.5% | ## Your MP - [Epsom and Ewell](https://openindex.co.uk/constituency/epsom-and-ewell): Helen Maguire (Liberal Democrat), 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. ## Middle areas in KT21 [Ashtead East](https://openindex.co.uk/mole-valley/ashtead-east), [Ashtead West](https://openindex.co.uk/mole-valley/ashtead-west) ## Postcode sectors in KT21 [KT21 1 (149 postcodes)](https://openindex.co.uk/postcode/kt21-1), [KT21 2 (224 postcodes)](https://openindex.co.uk/postcode/kt21-2), [KT21 9 (4 postcodes)](https://openindex.co.uk/postcode/kt21-9) ## Council [Mole Valley](https://openindex.co.uk/mole-valley) ## Towns in KT21 [Ashtead](https://openindex.co.uk/town/ashtead) ## Postcode districts next to KT21 [KT9](https://openindex.co.uk/postcode/kt9), [KT18](https://openindex.co.uk/postcode/kt18), [KT19](https://openindex.co.uk/postcode/kt19), [KT22](https://openindex.co.uk/postcode/kt22) ## Nearest rail stations [Ashtead (400 m from the middle)](https://openindex.co.uk/map/rail-stations?around=-0.3076,51.3179), [Leatherhead (2.6 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-0.3332,51.2988), [Epsom (Surrey) (3.4 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-0.2688,51.3344), [Tattenham Corner (4.4 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-0.2426,51.3092) ## More in the KT postcode area [All KT postcode districts](https://openindex.co.uk/postcode/kt), [Every UK postcode area](https://openindex.co.uk/postcode) ## KT21 in brief KT21 is a postcode district covering Ashtead, in Mole Valley. About 14,001 people lived in KT21 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £720,000 in 2025 across 159 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 30.1 per 1,000 people in the 12 months to August 2026 (police.uk). The median price paid for a home in KT21 was £720,000 in 2025. KT21 had 13,951 usual residents at the census. About 57% of people in KT21 live in a 1 km square that the radon atlas marks as a radon Affected Area. In KT21, 87.0% of homes and businesses could get gigabit-capable broadband in January 2026. ## About - Type: Postcode district - Code: KT21 - Postcode area: [KT](https://openindex.co.uk/postcode/kt) - Constituency: [Epsom and Ewell †](https://openindex.co.uk/constituency/epsom-and-ewell) - Council: [Mole Valley †](https://openindex.co.uk/mole-valley) - Area: 11.02 km² - People, mid-2024: 14,001* - Neighbourhoods: 10 - Output areas: 42 * 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 [KT22](https://openindex.co.uk/postcode/kt22), [KT18](https://openindex.co.uk/postcode/kt18), [KT19](https://openindex.co.uk/postcode/kt19), [KT9](https://openindex.co.uk/postcode/kt9) ## Latest updates for KT21 - 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/KT21 ## How to cite Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/kt21, or to one figure with its anchor, https://openindex.co.uk/postcode/kt21#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/postcode/kt21