# SN11

Postcode district covering Calne, The Square and Quemerford, in Wiltshire.

SN11 is a postcode district covering Calne, The Square and Quemerford, in Wiltshire. Median sale price £280,000 in 2025. Recorded crime 50.2 per 1,000 people.

Postcode district. Code SN11. 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 SN11 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £280,000** (2025). The median price paid for a home in SN11 was £280,000 in 2025. Joint 990th cheapest 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/sn11#f-house-sales-median-price
- **Population: 24,964** (2021). SN11 had 24,964 usual residents at the census (ONS Census 2021). 1,172nd 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/sn11#f-population
- **People in radon Affected Area squares: 79%** (2022). About 79% of people in SN11 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/sn11#f-radon-affected-share
- **Gigabit broadband coverage: 84.4%** (January 2026). In SN11, 84.4% 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/sn11#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas?place=SN11) (Worked out by Open Index · 2022): About 79% of people in SN11 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=SN11) (Worked out by Open Index · 2025): 475 homes were sold in SN11 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime?place=SN11) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for SN11.
- [Population by postcode district](https://openindex.co.uk/map/population?place=SN11) (Census 2021, England and Wales): SN11 had 24,964 usual residents at the census.

## How SN11 compares

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

| Measure | SN11 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £280,000 | 3rd cheapest | 18 postcode districts, SN · 2025 |
| Population | 24,964 | 8th least populated | 19 postcode districts, SN · 2021 |
| People in radon Affected Area squares | 79% | 3rd most people in radon Affected Areas | 19 postcode districts, SN · 2022 |
| Gigabit broadband coverage | 84.4% | 8th highest | 19 postcode districts, SN · Jan 2026 |

## Is SN11 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in SN11 at a rate of 50.2 per 1,000 people.
That compares with 66.2 per 1,000 people across the SN postcode area.
In August 2026 alone, 131 cases of crime and anti-social behaviour were recorded in SN11.
In the 12 months to August 2026, the most common types were violence and sexual offences (581), anti-social behaviour (243) and other crime (216).
A year earlier, the recorded crime rate in SN11 was 51.3 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 SN11, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so SN11 has no single figure. Of its 14 neighbourhoods with a rank:
- Decile 3: 1 neighbourhood
- Decile 4: 1 neighbourhood
- Decile 5: 3 neighbourhoods
- Decile 6: 1 neighbourhood
- Decile 7: 3 neighbourhoods
- Decile 8: 3 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 SN11

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [Wiltshire 013B](https://openindex.co.uk/wiltshire/neighbourhood/e01031904) | 2,582 | 34.1 per 1,000 | 8 | 64.2% |
| [Wiltshire 013C](https://openindex.co.uk/wiltshire/neighbourhood/e01031937) | 1,117 | 31.0 per 1,000 | 5 | 80.2% |
| [Wiltshire 013D](https://openindex.co.uk/wiltshire/neighbourhood/e01031938) | 1,544 | 35.4 per 1,000 | 8 | 69.9% |
| [Wiltshire 015A](https://openindex.co.uk/wiltshire/neighbourhood/e01031895) | 2,572 | 43.7 per 1,000 | 5 | 96.7% |
| [Wiltshire 015B](https://openindex.co.uk/wiltshire/neighbourhood/e01031896) | 1,457 | 120.7 per 1,000 | 3 | 75.3% |
| [Wiltshire 015C](https://openindex.co.uk/wiltshire/neighbourhood/e01031897) | 1,973 | 29.3 per 1,000 | 8 | 96.0% |
| [Wiltshire 015D](https://openindex.co.uk/wiltshire/neighbourhood/e01031898) | 1,803 | 55.6 per 1,000 | 5 | 99.2% |
| [Wiltshire 015F](https://openindex.co.uk/wiltshire/neighbourhood/e01032690) | 1,875 | 44.9 per 1,000 | 7 | 75.3% |
| [Wiltshire 015G](https://openindex.co.uk/wiltshire/neighbourhood/e01032691) | 1,435 | 67.3 per 1,000 | 6 | 98.3% |
| [Wiltshire 016B](https://openindex.co.uk/wiltshire/neighbourhood/e01031901) | 1,392 | 84.0 per 1,000 | 4 | 68.1% |
| [Wiltshire 016C](https://openindex.co.uk/wiltshire/neighbourhood/e01031902) | 1,837 | 47.5 per 1,000 | 7 | 98.0% |
| [Wiltshire 016D](https://openindex.co.uk/wiltshire/neighbourhood/e01031903) | 2,260 | 22.7 per 1,000 | 10 | 96.3% |
| [Wiltshire 016E](https://openindex.co.uk/wiltshire/neighbourhood/e01034524) | 1,221 | 79.9 per 1,000 | 7 | 65.4% |
| [Wiltshire 016F](https://openindex.co.uk/wiltshire/neighbourhood/e01034525) | 1,242 | 68.3 per 1,000 | 10 | 94.1% |

## Your MP

- [Chippenham](https://openindex.co.uk/constituency/chippenham): Sarah Gibson (Liberal Democrat), MP since July 2024. 79% of the people here.
- [Melksham and Devizes](https://openindex.co.uk/constituency/melksham-and-devizes): Brian Mathew (Liberal Democrat), MP since July 2024. 21% 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 SN11

[Calne North](https://openindex.co.uk/wiltshire/calne-north), [Calne South](https://openindex.co.uk/wiltshire/calne-south), [Derry Hill & Hilmarton](https://openindex.co.uk/wiltshire/derry-hill-and-hilmarton)

## Postcode sectors in SN11

[SN11 0 (238 postcodes)](https://openindex.co.uk/postcode/sn11-0), [SN11 7 (3 postcodes)](https://openindex.co.uk/postcode/sn11-7), [SN11 8 (297 postcodes)](https://openindex.co.uk/postcode/sn11-8), [SN11 9 (236 postcodes)](https://openindex.co.uk/postcode/sn11-9)

## Council

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

## Towns in SN11

[Calne](https://openindex.co.uk/town/calne)

## Postcode districts next to SN11

[SN4](https://openindex.co.uk/postcode/sn4), [SN8](https://openindex.co.uk/postcode/sn8), [SN10](https://openindex.co.uk/postcode/sn10), [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)

## SN11 in brief

SN11 is a postcode district covering Calne, The Square and Quemerford, in Wiltshire.
About 25,480 people lived in SN11 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £280,000 in 2025 across 475 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 50.2 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in SN11 was £280,000 in 2025.
SN11 had 24,964 usual residents at the census.
About 79% of people in SN11 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In SN11, 84.4% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: SN11
- 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: 114 km²
- People, mid-2024: 25,480*
- Neighbourhoods: 14
- Output areas: 80

* 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

[SN15](https://openindex.co.uk/postcode/sn15), [SN4](https://openindex.co.uk/postcode/sn4), [SN10](https://openindex.co.uk/postcode/sn10), [SN8](https://openindex.co.uk/postcode/sn8)

## Latest updates for SN11

- 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/SN11

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/sn11, or to one figure with its anchor, https://openindex.co.uk/postcode/sn11#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/sn11