Postcode district
AL4: house prices and neighbourhoods
The AL4 postcode district (Hertsmere, North Hertfordshire, St Albans, Welwyn Hatfield): 787 live postcodes across 13 neighbourhoods, with official figures as of 11 October 2026.
Typical house price
£720,000
Median of 67 resales of existing houses in AL4, Aug 2025 to Aug 2026.
Source: HM Land Registry Price Paid Data
Typical flat price
£277,500
Median of 10 resales of existing flats in AL4, Aug 2025 to Aug 2026.
Source: HM Land Registry Price Paid Data
Neighbourhoods in AL4
| Neighbourhood | Council | Typical house | Typical flat | Affluence today | Signs of gentrification |
|---|---|---|---|---|---|
| Shenley & South Mimms | Hertsmere | £596,500 | – | Affluent | Moving the other way |
| Knebworth, Codicote & Kimpton | North Hertfordshire | £535,000 | £276,250 | Affluent | Moving the other way |
| Bernards Heath | St Albans | £915,000 | – | Among the most affluent | Some signs |
| Colney Heath & Highfield Park | St Albans | £657,500 | – | Affluent | Moving the other way |
| Jersey Farm & Sandridge | St Albans | £571,500 | £270,000 | Among the most affluent | Few signs |
| London Colney | St Albans | £505,000 | £263,000 | Affluent | Few signs |
| Longacres | St Albans | £725,000 | £300,000 | Among the most affluent | Clear signs |
| Marshalswick | St Albans | £800,000 | £330,000 | Among the most affluent | Clear signs |
| The Camp & Cunningham | St Albans | £611,250 | £333,750 | Middle income | Mixed signs |
| Wheathampstead | St Albans | £735,000 | £240,000 | Among the most affluent | Moving the other way |
| Hatfield South | Welwyn Hatfield | £350,000 | – | Middle income | Moving the other way |
| Welham Green | Welwyn Hatfield | £482,500 | – | Middle income | Few signs |
| Welwyn & Hatfield Garden Village | Welwyn Hatfield | £587,500 | £240,000 | Affluent | Some signs |
Each neighbourhood's figures are the median resale prices of houses and flats, Affluence today and the gentrification indication from its own page.
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Prepare a full report for a home See a sample reportNeighbourhood names: House of Commons Library, MSOA Names, Open Parliament Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0. Contains National Statistics data © Crown copyright and database right 2026. Figures describe the area, not any home, and are not a valuation or a prediction.