# SN4

Postcode district covering Royal Wootton Bassett and Coped Hall, in Wiltshire and Swindon.

SN4 is a postcode district covering Royal Wootton Bassett and Coped Hall, in Wiltshire and Swindon. Median sale price £325,000 in 2025.

Postcode district. Code SN4. In: [Postcodes](https://openindex.co.uk/postcode) › [SN](https://openindex.co.uk/postcode/sn)

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 SN4 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £325,000** (2025). The median price paid for a home in SN4 was £325,000 in 2025. Joint 924th 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/sn4#f-house-sales-median-price
- **Population: 29,364** (2021). SN4 had 29,364 usual residents at the census (ONS Census 2021). 958th 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/sn4#f-population
- **People in radon Affected Area squares: 28%** (2022). About 28% of people in SN4 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/sn4#f-radon-affected-share
- **Gigabit broadband coverage: 91.0%** (January 2026). In SN4, 91.0% 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/sn4#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas?place=SN4) (Worked out by Open Index · 2022): About 28% of people in SN4 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=SN4) (Worked out by Open Index · 2025): 430 homes were sold in SN4 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime?place=SN4) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for SN4.
- [Population by postcode district](https://openindex.co.uk/map/population?place=SN4) (Census 2021, England and Wales): SN4 had 29,364 usual residents at the census.

## How SN4 compares

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

| Measure | SN4 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £325,000 | joint 8th most expensive | 18 postcode districts, SN · 2025 |
| Population | 29,364 | 8th most populated | 19 postcode districts, SN · 2021 |
| People in radon Affected Area squares | 28% | 8th most people in radon Affected Areas | 19 postcode districts, SN · 2022 |
| Gigabit broadband coverage | 91.0% | 7th highest | 19 postcode districts, SN · Jan 2026 |

## Is SN4 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in SN4 at a rate of 56.8 per 1,000 people.
That compares with 66.2 per 1,000 people across the SN postcode area.
In August 2026 alone, 146 cases of crime and anti-social behaviour were recorded in SN4.
In the 12 months to August 2026, the most common types were violence and sexual offences (740), other crime (308) and anti-social behaviour (304).
A year earlier, the recorded crime rate in SN4 was 51.5 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 SN4, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so SN4 has no single figure. Of its 17 neighbourhoods with a rank:
- Decile 4: 1 neighbourhood
- Decile 5: 1 neighbourhood
- Decile 6: 4 neighbourhoods
- Decile 8: 3 neighbourhoods
- Decile 9: 6 neighbourhoods
- Decile 10 (England’s least deprived 10%): 2 neighbourhoods

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

## Neighbourhoods in SN4

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [Swindon 008C](https://openindex.co.uk/swindon/neighbourhood/e01015547) | 1,860 | 153.8 per 1,000 | 9 | 79.9% |
| [Swindon 008D](https://openindex.co.uk/swindon/neighbourhood/e01015548) | 1,562 | 27.2 per 1,000 | 9 | 93.5% |
| [Swindon 025B](https://openindex.co.uk/swindon/neighbourhood/e01015584) | 1,424 | 39.6 per 1,000 | 8 | 99.1% |
| [Swindon 025C](https://openindex.co.uk/swindon/neighbourhood/e01015585) | 1,978 | 71.2 per 1,000 | 8 | 90.4% |
| [Swindon 025D](https://openindex.co.uk/swindon/neighbourhood/e01015586) | 1,373 | 37.6 per 1,000 | 10 | 99.2% |
| [Swindon 025E](https://openindex.co.uk/swindon/neighbourhood/e01015587) | 1,851 | 62.8 per 1,000 | 5 | 82.1% |
| [Swindon 025F](https://openindex.co.uk/swindon/neighbourhood/e01015588) | 1,778 | 40.4 per 1,000 | 6 | 98.8% |
| [Swindon 025H](https://openindex.co.uk/swindon/neighbourhood/e01033850) | 2,167 | 39.8 per 1,000 | 8 | 80.1% |
| [Wiltshire 006A](https://openindex.co.uk/wiltshire/neighbourhood/e01031963) | 2,151 | 97.7 per 1,000 | 4 | 97.8% |
| [Wiltshire 006B](https://openindex.co.uk/wiltshire/neighbourhood/e01031964) | 1,945 | 49.2 per 1,000 | 9 | 91.2% |
| [Wiltshire 006C](https://openindex.co.uk/wiltshire/neighbourhood/e01031967) | 2,202 | 97.9 per 1,000 | 6 | 88.4% |
| [Wiltshire 006D](https://openindex.co.uk/wiltshire/neighbourhood/e01031969) | 1,367 | 22.9 per 1,000 | 10 | 99.8% |
| [Wiltshire 007E](https://openindex.co.uk/wiltshire/neighbourhood/e01031961) | 1,383 | 48.5 per 1,000 | 6 | 91.8% |
| [Wiltshire 007F](https://openindex.co.uk/wiltshire/neighbourhood/e01031965) | 1,385 | 60.2 per 1,000 | 9 | 97.8% |
| [Wiltshire 007G](https://openindex.co.uk/wiltshire/neighbourhood/e01031966) | 2,807 | 38.7 per 1,000 | 9 | 88.3% |
| [Wiltshire 007H](https://openindex.co.uk/wiltshire/neighbourhood/e01031968) | 1,713 | 29.3 per 1,000 | 9 | 92.3% |
| [Wiltshire 012E](https://openindex.co.uk/wiltshire/neighbourhood/e01031884) | 1,559 | 42.7 per 1,000 | 6 | 78.1% |

## Your MP

- [Chippenham](https://openindex.co.uk/constituency/chippenham): Sarah Gibson (Liberal Democrat), MP since July 2024. 57% of the people here.
- [East Wiltshire](https://openindex.co.uk/constituency/east-wiltshire): Danny Kruger (Reform UK), MP since July 2024. 43% of the people here.
- [Swindon South](https://openindex.co.uk/constituency/swindon-south): Heidi Alexander (Labour), MP since July 2024. 0.1% 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 SN4

[Royal Wootton Bassett Outer & Lyneham](https://openindex.co.uk/wiltshire/royal-wootton-bassett-outer-and-lyneham), [Royal Wootton Bassett Town](https://openindex.co.uk/wiltshire/royal-wootton-bassett-town), [Wroughton, Wichelstowe & Chiseldon](https://openindex.co.uk/swindon/wroughton-wichelstowe-and-chiseldon)

## Postcode sectors in SN4

[SN4 0 (254 postcodes)](https://openindex.co.uk/postcode/sn4-0), [SN4 4 (84 postcodes)](https://openindex.co.uk/postcode/sn4-4), [SN4 7 (193 postcodes)](https://openindex.co.uk/postcode/sn4-7), [SN4 8 (201 postcodes)](https://openindex.co.uk/postcode/sn4-8), [SN4 9 (184 postcodes)](https://openindex.co.uk/postcode/sn4-9)

## Councils SN4 covers

[Wiltshire](https://openindex.co.uk/wiltshire), [Swindon](https://openindex.co.uk/swindon)

## Towns in SN4

[Royal Wootton Bassett](https://openindex.co.uk/town/royal-wootton-bassett)

## Postcode districts next to SN4

[SN1](https://openindex.co.uk/postcode/sn1), [SN2](https://openindex.co.uk/postcode/sn2), [SN3](https://openindex.co.uk/postcode/sn3), [SN5](https://openindex.co.uk/postcode/sn5), [SN6](https://openindex.co.uk/postcode/sn6), [SN8](https://openindex.co.uk/postcode/sn8), [SN11](https://openindex.co.uk/postcode/sn11), [SN15](https://openindex.co.uk/postcode/sn15)

## More in the SN postcode area

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

## SN4 in brief

SN4 is a postcode district covering Royal Wootton Bassett and Coped Hall, in Wiltshire and Swindon.
About 30,260 people lived in SN4 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £325,000 in 2025 across 430 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 56.8 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in SN4 was £325,000 in 2025.
SN4 had 29,364 usual residents at the census.
About 28% of people in SN4 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In SN4, 91.0% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: SN4
- Postcode area: [SN](https://openindex.co.uk/postcode/sn)
- Constituency: [Chippenham †](https://openindex.co.uk/constituency/chippenham)
- Council: [Wiltshire †](https://openindex.co.uk/wiltshire)
- Area: 179 km²
- People, mid-2024: 30,260*
- Neighbourhoods: 17
- Output areas: 96

* 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

[SN8](https://openindex.co.uk/postcode/sn8), [SN1](https://openindex.co.uk/postcode/sn1), [SN15](https://openindex.co.uk/postcode/sn15), [SN6](https://openindex.co.uk/postcode/sn6), [SN5](https://openindex.co.uk/postcode/sn5), [SN3](https://openindex.co.uk/postcode/sn3)

## Latest updates for SN4

- 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/SN4

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/sn4, or to one figure with its anchor, https://openindex.co.uk/postcode/sn4#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/sn4