BH21 4 postcode sector in the BH21 district
BH21 4 is a sector of the BH21 district: every postcode that starts BH21 4. It has 137 postcodes in use, one of them a large-user postcode. A large-user postcode is one Royal Mail gives to a single address that gets a lot of mail.
Not sure what a sector is? UK postcode format explained.
Every postcode in the BH21 4 sector, and which are new since 2020
- New since 2020: 22
- In use before 2020: 115
- Outline: where 5 or more new postcodes since 2020 lie together
Of the 137 postcodes in the BH21 4 sector that ONS places, 22 are new since 2020 and 115 were in use before 2020.
Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. New since 2020 means it came into use in January 2020 or later. A dashed outline shows where 5 or more lie within 180 metres of each other. It is not a boundary, and no boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.
Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; roads, rivers and built-up areas: Ordnance Survey open maps. Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre.
The 5 newest postcodes
Where the new postcodes lie together
- 19 new postcodes since 2020, outlined on the map. BH21 4FY, is the newest of them.
What do homes sell for in BH21 4?
Homes in BH21 4 sold for a typical £475,000 in the 12 months to September 2026, across 41 sales, HM Land Registry's figures show. The 12 months before gave £440,000 from 85 sales: not a change larger than chance would explain, given which homes happened to sell.
- Detached £557,500 21 sales
- Semi-detached £390,000 16 sales
- Terraced 3 sales, too few to price
- Flat or maisonette 1 sale, too few to price
Each bar is that kind's typical price, against the most expensive kind here.
Standard sales of homes at market value at the postcodes that start BH21 4. A typical price is the median, the middle sale, given from 5 sales or more.
How we work this out: house prices by postcodeSource: HM Land Registry Price Paid Data, files dated 28 October 2026.
Postcodes in BH21 4
Pick a postcode to see its council and MP, broadband, flood risk, what homes sell for, council tax, the nearest schools and stations, and crime around it.
Source: ONS Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed.
Other sectors in BH21
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Where the facts on this page come from
- Office for National Statistics: ONS Postcode Directory
- HM Land Registry Price Paid Data
Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0.
Licence: Open Government Licence v3.0.
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