# SO18

Postcode district covering Southampton, Bitterne and Harefield, in Southampton.

SO18 is a postcode district covering Southampton, Bitterne and Harefield, in Southampton. Median sale price £275,000 in 2025.

Postcode district. Code SO18. 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 SO18 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £275,000** (2025). The median price paid for a home in SO18 was £275,000 in 2025. Joint 940th 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/so18#f-house-sales-median-price
- **Population: 37,192** (2021). SO18 had 37,192 usual residents at the census (ONS Census 2021). 547th 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/so18#f-population
- **People in radon Affected Area squares: 31%** (2022). About 31% of people in SO18 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/so18#f-radon-affected-share
- **Gigabit broadband coverage: 98.7%** (January 2026). In SO18, 98.7% 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/so18#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas?place=SO18) (Worked out by Open Index · 2022): About 31% of people in SO18 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=SO18) (Worked out by Open Index · 2025): 499 homes were sold in SO18 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime?place=SO18) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for SO18.
- [Population by postcode district](https://openindex.co.uk/map/population?place=SO18) (Census 2021, England and Wales): SO18 had 37,192 usual residents at the census.

## How SO18 compares

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

| Measure | SO18 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £275,000 | joint 5th cheapest | 23 postcode districts, SO · 2025 |
| Population | 37,192 | 7th most populated | 24 postcode districts, SO · 2021 |
| People in radon Affected Area squares | 31% | 11th fewest people in radon Affected Areas | 24 postcode districts, SO · 2022 |
| Gigabit broadband coverage | 98.7% | 2nd highest | 24 postcode districts, SO · Jan 2026 |

## Is SO18 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in SO18 at a rate of 87.7 per 1,000 people.
That compares with 86.0 per 1,000 people across the SO postcode area.
In August 2026 alone, 285 cases of crime and anti-social behaviour were recorded in SO18.
In the 12 months to August 2026, the most common types were violence and sexual offences (1,322), other crime (544) and anti-social behaviour (311).
A year earlier, the recorded crime rate in SO18 was 91.5 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 SO18, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so SO18 has no single figure. Of its 23 neighbourhoods with a rank:
- Decile 1 (England’s most deprived 10%): 1 neighbourhood
- Decile 2: 2 neighbourhoods
- Decile 3: 1 neighbourhood
- Decile 4: 6 neighbourhoods
- Decile 5: 2 neighbourhoods
- Decile 6: 4 neighbourhoods
- Decile 7: 2 neighbourhoods
- Decile 8: 2 neighbourhoods
- Decile 9: 2 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 SO18

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [Eastleigh 009D](https://openindex.co.uk/eastleigh/neighbourhood/e01022716) | 1,453 | 84.4 per 1,000 | 6 | 99.2% |
| [Eastleigh 009E](https://openindex.co.uk/eastleigh/neighbourhood/e01022717) | 1,165 | 39.6 per 1,000 | 10 | 100.0% |
| [Eastleigh 009F](https://openindex.co.uk/eastleigh/neighbourhood/e01022718) | 1,537 | 54.4 per 1,000 | 9 | 92.5% |
| [Southampton 003A](https://openindex.co.uk/southampton/neighbourhood/e01017264) | 2,423 | 96.8 per 1,000 | 4 | 98.9% |
| [Southampton 003B](https://openindex.co.uk/southampton/neighbourhood/e01017265) | 1,606 | 114.8 per 1,000 | 2 | 98.3% |
| [Southampton 008A](https://openindex.co.uk/southampton/neighbourhood/e01017174) | 1,423 | 80.5 per 1,000 | 8 | 100.0% |
| [Southampton 008B](https://openindex.co.uk/southampton/neighbourhood/e01017175) | 1,504 | 79.8 per 1,000 | 8 | 99.4% |
| [Southampton 008C](https://openindex.co.uk/southampton/neighbourhood/e01017176) | 1,571 | 59.0 per 1,000 | 6 | 100.0% |
| [Southampton 008D](https://openindex.co.uk/southampton/neighbourhood/e01017179) | 1,253 | 57.3 per 1,000 | 4 | 94.8% |
| [Southampton 014A](https://openindex.co.uk/southampton/neighbourhood/e01017171) | 1,862 | 40.8 per 1,000 | 5 | 99.8% |
| [Southampton 014B](https://openindex.co.uk/southampton/neighbourhood/e01017172) | 1,851 | 70.9 per 1,000 | 4 | 99.7% |
| [Southampton 014C](https://openindex.co.uk/southampton/neighbourhood/e01017173) | 1,519 | 116.6 per 1,000 | 6 | 98.9% |
| [Southampton 014D](https://openindex.co.uk/southampton/neighbourhood/e01017177) | 1,582 | 103.2 per 1,000 | 6 | 97.8% |
| [Southampton 014E](https://openindex.co.uk/southampton/neighbourhood/e01017178) | 1,504 | 42.7 per 1,000 | 9 | 100.0% |
| [Southampton 016A](https://openindex.co.uk/southampton/neighbourhood/e01017200) | 1,845 | 79.1 per 1,000 | 7 | 98.4% |
| [Southampton 016B](https://openindex.co.uk/southampton/neighbourhood/e01017201) | 1,268 | 79.5 per 1,000 | 3 | 94.5% |
| [Southampton 016C](https://openindex.co.uk/southampton/neighbourhood/e01017202) | 1,737 | 189.6 per 1,000 | 1 | 100.0% |
| [Southampton 016D](https://openindex.co.uk/southampton/neighbourhood/e01017203) | 1,671 | 63.1 per 1,000 | 5 | 100.0% |
| [Southampton 016E](https://openindex.co.uk/southampton/neighbourhood/e01017204) | 1,564 | 47.1 per 1,000 | 7 | 99.7% |
| [Southampton 018A](https://openindex.co.uk/southampton/neighbourhood/e01017198) | 1,480 | 69.4 per 1,000 | 4 | 99.0% |
| [Southampton 018B](https://openindex.co.uk/southampton/neighbourhood/e01017199) | 1,601 | 96.3 per 1,000 | 4 | 100.0% |
| [Southampton 018C](https://openindex.co.uk/southampton/neighbourhood/e01017205) | 1,643 | 138.0 per 1,000 | 2 | 99.8% |
| [Southampton 018D](https://openindex.co.uk/southampton/neighbourhood/e01017206) | 1,677 | 85.0 per 1,000 | 4 | 100.0% |

## Your MP

- [Southampton Itchen](https://openindex.co.uk/constituency/southampton-itchen): Darren Paffey (Labour), MP since July 2024. 83% of the people here.
- [Eastleigh](https://openindex.co.uk/constituency/eastleigh): Liz Jarvis (Liberal Democrat), MP since July 2024. 9.8% of the people here.
- [Romsey and Southampton North](https://openindex.co.uk/constituency/romsey-and-southampton-north): Caroline Nokes (Conservative), MP since July 2024. 7.4% 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 SO18

[Bitterne East](https://openindex.co.uk/southampton/bitterne-east), [Bitterne West](https://openindex.co.uk/southampton/bitterne-west), [Harefield](https://openindex.co.uk/southampton/harefield), [Townhill Park](https://openindex.co.uk/southampton/townhill-park)

## Postcode sectors in SO18

[SO18 1 (193 postcodes)](https://openindex.co.uk/postcode/so18-1), [SO18 2 (237 postcodes)](https://openindex.co.uk/postcode/so18-2), [SO18 3 (83 postcodes)](https://openindex.co.uk/postcode/so18-3), [SO18 4 (109 postcodes)](https://openindex.co.uk/postcode/so18-4), [SO18 5 (195 postcodes)](https://openindex.co.uk/postcode/so18-5), [SO18 6 (75 postcodes)](https://openindex.co.uk/postcode/so18-6), [SO18 9 (48 postcodes)](https://openindex.co.uk/postcode/so18-9)

## Council

[Southampton](https://openindex.co.uk/southampton)

## Towns in SO18

[Southampton](https://openindex.co.uk/southampton), [West End](https://openindex.co.uk/town/west-end)

## Postcode districts next to SO18

[SO16](https://openindex.co.uk/postcode/so16), [SO17](https://openindex.co.uk/postcode/so17), [SO19](https://openindex.co.uk/postcode/so19), [SO30](https://openindex.co.uk/postcode/so30), [SO97](https://openindex.co.uk/postcode/so97)

## Nearest rail stations

[Bitterne (1.4 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-1.3770,50.9182), [St Denys (1.9 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-1.3878,50.9222), [Swaythling (2.0 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-1.3764,50.9412), [Southampton Airport Parkway (2.8 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-1.3631,50.9508)

## 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)

## SO18 in brief

SO18 is a postcode district covering Southampton, Bitterne and Harefield, in Southampton.
About 37,702 people lived in SO18 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £275,000 in 2025 across 499 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 87.7 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in SO18 was £275,000 in 2025.
SO18 had 37,192 usual residents at the census.
About 31% of people in SO18 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In SO18, 98.7% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: SO18
- Postcode area: [SO](https://openindex.co.uk/postcode/so)
- Constituency: [Southampton Itchen †](https://openindex.co.uk/constituency/southampton-itchen)
- Council: [Southampton †](https://openindex.co.uk/southampton)
- Area: 8.22 km²
- People, mid-2024: 37,702*
- Neighbourhoods: 23
- Output areas: 125

* 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

[SO19](https://openindex.co.uk/postcode/so19), [SO30](https://openindex.co.uk/postcode/so30), [SO16](https://openindex.co.uk/postcode/so16), [SO97](https://openindex.co.uk/postcode/so97), [SO17](https://openindex.co.uk/postcode/so17)

## Latest updates for SO18

- 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/SO18

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/so18, or to one figure with its anchor, https://openindex.co.uk/postcode/so18#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/so18