# SO51

Postcode district covering Romsey and Cupernham, in Test Valley.

SO51 is a postcode district covering Romsey and Cupernham, in Test Valley. Median sale price £410,000 in 2025. Recorded crime 54.3 per 1,000 people.

Postcode district. Code SO51. In: [Postcodes](https://openindex.co.uk/postcode) › [SO](https://openindex.co.uk/postcode/so)

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 SO51 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £410,000** (2025). The median price paid for a home in SO51 was £410,000 in 2025. Joint 556th 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/so51#f-house-sales-median-price
- **Population: 29,479** (2021). SO51 had 29,479 usual residents at the census (ONS Census 2021). 950th 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/so51#f-population
- **People in radon Affected Area squares: 32%** (2022). About 32% of people in SO51 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/so51#f-radon-affected-share
- **Gigabit broadband coverage: 69.4%** (January 2026). In SO51, 69.4% 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/so51#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas?place=SO51) (Worked out by Open Index · 2022): About 32% of people in SO51 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=SO51) (Worked out by Open Index · 2025): 502 homes were sold in SO51 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime?place=SO51) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for SO51.
- [Population by postcode district](https://openindex.co.uk/map/population?place=SO51) (Census 2021, England and Wales): SO51 had 29,479 usual residents at the census.

## How SO51 compares

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

| Measure | SO51 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £410,000 | 11th most expensive | 23 postcode districts, SO · 2025 |
| Population | 29,479 | 11th least populated | 24 postcode districts, SO · 2021 |
| People in radon Affected Area squares | 32% | 12th fewest people in radon Affected Areas | 24 postcode districts, SO · 2022 |
| Gigabit broadband coverage | 69.4% | 6th lowest | 24 postcode districts, SO · Jan 2026 |

## Is SO51 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in SO51 at a rate of 54.3 per 1,000 people.
That compares with 86.0 per 1,000 people across the SO postcode area.
In August 2026 alone, 147 cases of crime and anti-social behaviour were recorded in SO51.
In the 12 months to August 2026, the most common types were violence and sexual offences (570), other crime (321) and anti-social behaviour (205).
A year earlier, the recorded crime rate in SO51 was 54.5 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 SO51, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so SO51 has no single figure. Of its 20 neighbourhoods with a rank:
- Decile 5: 2 neighbourhoods
- Decile 6: 3 neighbourhoods
- Decile 7: 4 neighbourhoods
- Decile 8: 3 neighbourhoods
- Decile 9: 4 neighbourhoods
- Decile 10 (England’s least deprived 10%): 4 neighbourhoods

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

## Neighbourhoods in SO51

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [Test Valley 009C](https://openindex.co.uk/test-valley/neighbourhood/e01023177) | 2,257 | 44.8 per 1,000 | 5 | 44.0% |
| [Test Valley 009D](https://openindex.co.uk/test-valley/neighbourhood/e01023184) | 1,425 | 43.0 per 1,000 | 7 | 50.5% |
| [Test Valley 010A](https://openindex.co.uk/test-valley/neighbourhood/e01023174) | 1,658 | 30.5 per 1,000 | 9 | 100.0% |
| [Test Valley 010B](https://openindex.co.uk/test-valley/neighbourhood/e01023175) | 1,524 | 23.5 per 1,000 | 10 | 98.8% |
| [Test Valley 010C](https://openindex.co.uk/test-valley/neighbourhood/e01023176) | 1,547 | 49.1 per 1,000 | 7 | 98.3% |
| [Test Valley 010D](https://openindex.co.uk/test-valley/neighbourhood/e01023207) | 1,566 | 29.6 per 1,000 | 10 | 98.4% |
| [Test Valley 010E](https://openindex.co.uk/test-valley/neighbourhood/e01023208) | 1,090 | 36.7 per 1,000 | 6 | 99.6% |
| [Test Valley 010F](https://openindex.co.uk/test-valley/neighbourhood/e01023209) | 1,275 | 13.1 per 1,000 | 10 | 96.8% |
| [Test Valley 011A](https://openindex.co.uk/test-valley/neighbourhood/e01023150) | 1,683 | 75.4 per 1,000 | 8 | 86.0% |
| [Test Valley 011B](https://openindex.co.uk/test-valley/neighbourhood/e01023151) | 1,381 | 127.0 per 1,000 | 5 | 74.2% |
| [Test Valley 011C](https://openindex.co.uk/test-valley/neighbourhood/e01023152) | 1,654 | 137.0 per 1,000 | 9 | 73.9% |
| [Test Valley 011D](https://openindex.co.uk/test-valley/neighbourhood/e01023206) | 1,138 | 47.6 per 1,000 | 6 | 92.4% |
| [Test Valley 012A](https://openindex.co.uk/test-valley/neighbourhood/e01023158) | 2,392 | 34.0 per 1,000 | 9 | 25.8% |
| [Test Valley 012F](https://openindex.co.uk/test-valley/neighbourhood/e01023200) | 1,511 | 15.1 per 1,000 | 10 | 84.0% |
| [Test Valley 013A](https://openindex.co.uk/test-valley/neighbourhood/e01023162) | 1,854 | 22.7 per 1,000 | 7 | 23.8% |
| [Test Valley 013B](https://openindex.co.uk/test-valley/neighbourhood/e01023163) | 1,624 | 36.3 per 1,000 | 9 | 11.5% |
| [Test Valley 013C](https://openindex.co.uk/test-valley/neighbourhood/e01023164) | 1,557 | 44.6 per 1,000 | 7 | 13.0% |
| [Test Valley 013E](https://openindex.co.uk/test-valley/neighbourhood/e01035450) | 1,610 | 62.4 per 1,000 | 6 | 92.8% |
| [Test Valley 013F](https://openindex.co.uk/test-valley/neighbourhood/e01035451) | 1,588 | 57.2 per 1,000 | 8 | 88.3% |
| [Test Valley 013G](https://openindex.co.uk/test-valley/neighbourhood/e01035452) | 1,532 | 93.6 per 1,000 | 8 | 64.7% |

## Your MP

- [Romsey and Southampton North](https://openindex.co.uk/constituency/romsey-and-southampton-north): Caroline Nokes (Conservative), MP since July 2024. 98% of the people here.
- [New Forest East](https://openindex.co.uk/constituency/new-forest-east): Sir Julian Lewis (Conservative), MP since July 2024. 1.5% of the people here.
- [Winchester](https://openindex.co.uk/constituency/winchester): Dr Danny Chambers (Liberal Democrat), MP since July 2024. 0.5% of the people here.
- [Salisbury](https://openindex.co.uk/constituency/salisbury): John Glen (Conservative), 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 SO51

[Abbotswood & West Wellow](https://openindex.co.uk/test-valley/abbotswood-and-west-wellow), [Romsey Cupernham & Halterworth](https://openindex.co.uk/test-valley/romsey-cupernham-and-halterworth), [Romsey Town](https://openindex.co.uk/test-valley/romsey-town)

## Postcode sectors in SO51

[SO51 0 (203 postcodes)](https://openindex.co.uk/postcode/so51-0), [SO51 1 (17 postcodes)](https://openindex.co.uk/postcode/so51-1), [SO51 5 (109 postcodes)](https://openindex.co.uk/postcode/so51-5), [SO51 6 (149 postcodes)](https://openindex.co.uk/postcode/so51-6), [SO51 7 (160 postcodes)](https://openindex.co.uk/postcode/so51-7), [SO51 8 (179 postcodes)](https://openindex.co.uk/postcode/so51-8), [SO51 9 (64 postcodes)](https://openindex.co.uk/postcode/so51-9)

## Council

[Test Valley](https://openindex.co.uk/test-valley)

## Towns in SO51

[Romsey](https://openindex.co.uk/town/romsey)

## Postcode districts next to SO51

[SO16](https://openindex.co.uk/postcode/so16), [SO20](https://openindex.co.uk/postcode/so20), [SO21](https://openindex.co.uk/postcode/so21), [SO40](https://openindex.co.uk/postcode/so40), [SO43](https://openindex.co.uk/postcode/so43), [SO52](https://openindex.co.uk/postcode/so52), [SO53](https://openindex.co.uk/postcode/so53), [SP5](https://openindex.co.uk/postcode/sp5)

## Nearest rail stations

[Romsey (2.5 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-1.4931,50.9925), [Mottisfont and Dunbridge (3.8 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-1.5471,51.0339)

## More in the SO postcode area

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

## SO51 in brief

SO51 is a postcode district covering Romsey and Cupernham, in Test Valley.
About 30,251 people lived in SO51 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £410,000 in 2025 across 502 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 54.3 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in SO51 was £410,000 in 2025.
SO51 had 29,479 usual residents at the census.
About 32% of people in SO51 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In SO51, 69.4% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: SO51
- Postcode area: [SO](https://openindex.co.uk/postcode/so)
- Constituency: [Romsey and Southampton North †](https://openindex.co.uk/constituency/romsey-and-southampton-north)
- Council: [Test Valley †](https://openindex.co.uk/test-valley)
- Area: 127 km²
- People, mid-2024: 30,251*
- Neighbourhoods: 20
- Output areas: 95

* 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

[SP5](https://openindex.co.uk/postcode/sp5), [SO20](https://openindex.co.uk/postcode/so20), [SO40](https://openindex.co.uk/postcode/so40), [SO21](https://openindex.co.uk/postcode/so21), [SO16](https://openindex.co.uk/postcode/so16), [SO52](https://openindex.co.uk/postcode/so52)

## Latest updates for SO51

- 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/SO51

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/so51, or to one figure with its anchor, https://openindex.co.uk/postcode/so51#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/so51