# AL4

Postcode district covering St Albans, Wheathampstead and Marshalswick, in St Albans.

AL4 is a postcode district covering St Albans, Wheathampstead and Marshalswick, in St Albans. Median sale price £638,750 in 2025.

Postcode district. Code AL4. In: [Postcodes](https://openindex.co.uk/postcode) › [AL](https://openindex.co.uk/postcode/al)

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 AL4 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £638,750** (2025). The median price paid for a home in AL4 was £638,750 in 2025. 116th 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/al4#f-house-sales-median-price
- **Population: 28,034** (2021). AL4 had 28,034 usual residents at the census (ONS Census 2021). 1,026th 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/al4#f-population
- **People in radon Affected Area squares: 69%** (2022). About 69% of people in AL4 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/al4#f-radon-affected-share
- **Gigabit broadband coverage: 93.0%** (January 2026). In AL4, 93.0% 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/al4#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas?place=AL4) (Worked out by Open Index · 2022): About 69% of people in AL4 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=AL4) (Worked out by Open Index · 2025): 412 homes were sold in AL4 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime?place=AL4) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for AL4.
- [Population by postcode district](https://openindex.co.uk/map/population?place=AL4) (Census 2021, England and Wales): AL4 had 28,034 usual residents at the census.

## How AL4 compares

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

| Measure | AL4 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £638,750 | 3rd most expensive | 10 postcode districts, AL · 2025 |
| Population | 28,034 | 5th least populated | 10 postcode districts, AL · 2021 |
| People in radon Affected Area squares | 69% | 5th fewest people in radon Affected Areas | 10 postcode districts, AL · 2022 |
| Gigabit broadband coverage | 93.0% | 4th highest | 10 postcode districts, AL · Jan 2026 |

## Is AL4 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in AL4 at a rate of 60.6 per 1,000 people.
That compares with 87.3 per 1,000 people across the AL postcode area.
In August 2026 alone, 172 cases of crime and anti-social behaviour were recorded in AL4.
In the 12 months to August 2026, the most common types were violence and sexual offences (565), anti-social behaviour (394) and other crime (236).
A year earlier, the recorded crime rate in AL4 was 53.9 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 AL4, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so AL4 has no single figure. Of its 17 neighbourhoods with a rank:
- Decile 4: 1 neighbourhood
- Decile 5: 1 neighbourhood
- Decile 6: 1 neighbourhood
- Decile 7: 1 neighbourhood
- Decile 8: 1 neighbourhood
- Decile 9: 5 neighbourhoods
- Decile 10 (England’s least deprived 10%): 7 neighbourhoods

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

## Neighbourhoods in AL4

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [St Albans 004A](https://openindex.co.uk/st-albans/neighbourhood/e01023746) | 1,603 | 77.7 per 1,000 | 5 | 99.3% |
| [St Albans 004B](https://openindex.co.uk/st-albans/neighbourhood/e01023747) | 1,812 | 63.0 per 1,000 | 9 | 96.8% |
| [St Albans 004C](https://openindex.co.uk/st-albans/neighbourhood/e01023748) | 1,403 | 26.5 per 1,000 | 10 | 60.0% |
| [St Albans 004D](https://openindex.co.uk/st-albans/neighbourhood/e01023749) | 1,898 | 28.6 per 1,000 | 10 | 95.4% |
| [St Albans 007B](https://openindex.co.uk/st-albans/neighbourhood/e01023734) | 1,629 | 31.8 per 1,000 | 10 | 97.0% |
| [St Albans 007C](https://openindex.co.uk/st-albans/neighbourhood/e01023735) | 1,676 | 87.4 per 1,000 | 10 | 95.0% |
| [St Albans 007D](https://openindex.co.uk/st-albans/neighbourhood/e01023736) | 1,640 | 84.8 per 1,000 | 7 | 85.9% |
| [St Albans 008A](https://openindex.co.uk/st-albans/neighbourhood/e01023709) | 1,725 | 41.4 per 1,000 | 9 | 91.6% |
| [St Albans 008B](https://openindex.co.uk/st-albans/neighbourhood/e01023710) | 1,599 | 16.1 per 1,000 | 10 | 99.8% |
| [St Albans 008C](https://openindex.co.uk/st-albans/neighbourhood/e01023711) | 1,632 | 26.8 per 1,000 | 10 | 99.8% |
| [St Albans 008D](https://openindex.co.uk/st-albans/neighbourhood/e01023712) | 2,016 | 63.9 per 1,000 | 8 | 98.9% |
| [St Albans 013A](https://openindex.co.uk/st-albans/neighbourhood/e01023664) | 1,909 | 39.0 per 1,000 | 9 | 100.0% |
| [St Albans 013D](https://openindex.co.uk/st-albans/neighbourhood/e01023668) | 1,407 | 25.4 per 1,000 | 10 | 100.0% |
| [St Albans 021A](https://openindex.co.uk/st-albans/neighbourhood/e01023680) | 1,483 | 99.0 per 1,000 | 9 | 95.9% |
| [St Albans 021B](https://openindex.co.uk/st-albans/neighbourhood/e01023677) | 1,279 | 172.1 per 1,000 | 4 | 86.0% |
| [St Albans 021C](https://openindex.co.uk/st-albans/neighbourhood/e01035581) | 1,575 | 118.3 per 1,000 | 6 | 98.5% |
| [St Albans 021D](https://openindex.co.uk/st-albans/neighbourhood/e01023678) | 1,932 | 58.3 per 1,000 | 9 | 97.0% |

## Your MP

- [St Albans](https://openindex.co.uk/constituency/st-albans): Daisy Cooper (Liberal Democrat), MP since July 2024. 55% of the people here.
- [Harpenden and Berkhamsted](https://openindex.co.uk/constituency/harpenden-and-berkhamsted): Victoria Collins (Liberal Democrat), MP since July 2024. 42% of the people here.
- [Hitchin](https://openindex.co.uk/constituency/hitchin): Alistair Strathern (Labour), MP since July 2024. 1.5% of the people here.
- [Welwyn Hatfield](https://openindex.co.uk/constituency/welwyn-hatfield): Andrew Lewin (Labour), MP since July 2024. 1.3% of the people here.
- [Hertsmere](https://openindex.co.uk/constituency/hertsmere): Sir Oliver Dowden (Conservative), MP since July 2024. 0.4% 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 AL4

[Colney Heath & Highfield Park](https://openindex.co.uk/st-albans/colney-heath-and-highfield-park), [Jersey Farm & Sandridge](https://openindex.co.uk/st-albans/jersey-farm-and-sandridge), [Marshalswick](https://openindex.co.uk/st-albans/marshalswick), [Wheathampstead](https://openindex.co.uk/st-albans/wheathampstead)

## Postcode sectors in AL4

[AL4 0 (291 postcodes)](https://openindex.co.uk/postcode/al4-0), [AL4 8 (209 postcodes)](https://openindex.co.uk/postcode/al4-8), [AL4 9 (287 postcodes)](https://openindex.co.uk/postcode/al4-9)

## Council

[St Albans](https://openindex.co.uk/st-albans)

## Towns in AL4

[St Albans](https://openindex.co.uk/town/st-albans)

## Postcode districts next to AL4

[AL1](https://openindex.co.uk/postcode/al1), [AL2](https://openindex.co.uk/postcode/al2), [AL3](https://openindex.co.uk/postcode/al3), [AL5](https://openindex.co.uk/postcode/al5), [AL6](https://openindex.co.uk/postcode/al6), [AL8](https://openindex.co.uk/postcode/al8), [AL9](https://openindex.co.uk/postcode/al9), [AL10](https://openindex.co.uk/postcode/al10), [EN6](https://openindex.co.uk/postcode/en6), [LU1](https://openindex.co.uk/postcode/lu1), [SG4](https://openindex.co.uk/postcode/sg4)

## Nearest rail stations

[Harpenden (4.4 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-0.3515,51.8146)

## More in the AL postcode area

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

## AL4 in brief

AL4 is a postcode district covering St Albans, Wheathampstead and Marshalswick, in St Albans.
About 29,083 people lived in AL4 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £638,750 in 2025 across 412 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 60.6 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in AL4 was £638,750 in 2025.
AL4 had 28,034 usual residents at the census.
About 69% of people in AL4 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In AL4, 93.0% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: AL4
- Postcode area: [AL](https://openindex.co.uk/postcode/al)
- Constituency: [St Albans †](https://openindex.co.uk/constituency/st-albans)
- Council: [St Albans †](https://openindex.co.uk/st-albans)
- Area: 52.93 km²
- People, mid-2024: 29,083*
- Neighbourhoods: 17
- Output areas: 85

* 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

[AL5](https://openindex.co.uk/postcode/al5), [SG4](https://openindex.co.uk/postcode/sg4), [AL8](https://openindex.co.uk/postcode/al8), [AL1](https://openindex.co.uk/postcode/al1), [AL10](https://openindex.co.uk/postcode/al10), [AL3](https://openindex.co.uk/postcode/al3)

## Latest updates for AL4

- 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/AL4

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/al4, or to one figure with its anchor, https://openindex.co.uk/postcode/al4#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/al4