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, by flood risk

Map of every postcode in the BH21 4 sector, by flood risk Of the 137 postcodes in the BH21 4 sector that ONS places, 8 have a home or business at high risk, 8 are at medium risk at worst, 9 are at low risk at worst, 1 are at very low risk only and 111 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 6 postcodes at high or medium risk. Places named: Wimborne Minster, Merley. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. A31A350 BH21 4AA: not on the flood risk listBH21 4AB: not on the flood risk listBH21 4AE: not on the flood risk listBH21 4AF: not on the flood risk listBH21 4AG: not on the flood risk listBH21 4AH: not on the flood risk listBH21 4AJ: not on the flood risk listBH21 4AL: not on the flood risk listBH21 4AP: not on the flood risk listBH21 4AR: not on the flood risk listBH21 4AS: not on the flood risk listBH21 4AW: not on the flood risk listBH21 4BB: not on the flood risk listBH21 4BE: not on the flood risk listBH21 4BQ: not on the flood risk listBH21 4DB: not on the flood risk listBH21 4DG: not on the flood risk listBH21 4DH: not on the flood risk listBH21 4DL: not on the flood risk listBH21 4DN: not on the flood risk listBH21 4DP: not on the flood risk listBH21 4DQ: not on the flood risk listBH21 4DR: not on the flood risk listBH21 4DS: not on the flood risk listBH21 4DT: not on the flood risk listBH21 4DW: not on the flood risk listBH21 4DX: not on the flood risk listBH21 4DY: not on the flood risk listBH21 4DZ: not on the flood risk listBH21 4EA: not on the flood risk listBH21 4EB: not on the flood risk listBH21 4ED: not on the flood risk listBH21 4EE: not on the flood risk listBH21 4EF: not on the flood risk listBH21 4EG: not on the flood risk listBH21 4EH: not on the flood risk listBH21 4EN: not on the flood risk listBH21 4EP: not on the flood risk listBH21 4EQ: not on the flood risk listBH21 4ET: not on the flood risk listBH21 4EU: not on the flood risk listBH21 4EW: not on the flood risk listBH21 4EX: not on the flood risk listBH21 4EY: not on the flood risk listBH21 4EZ: not on the flood risk listBH21 4FB: not on the flood risk listBH21 4FE: not on the flood risk listBH21 4FF: not on the flood risk listBH21 4FG: not on the flood risk listBH21 4FH: not on the flood risk listBH21 4FJ: not on the flood risk listBH21 4FN: not on the flood risk listBH21 4FQ: not on the flood risk listBH21 4FS: not on the flood risk listBH21 4FU: not on the flood risk listBH21 4FW: not on the flood risk listBH21 4FX: not on the flood risk listBH21 4FY: not on the flood risk listBH21 4GA: not on the flood risk listBH21 4GB: not on the flood risk listBH21 4GD: not on the flood risk listBH21 4GE: not on the flood risk listBH21 4GF: not on the flood risk listBH21 4GG: not on the flood risk listBH21 4GH: not on the flood risk listBH21 4HA: not on the flood risk listBH21 4HB: not on the flood risk listBH21 4HD: not on the flood risk listBH21 4HE: not on the flood risk listBH21 4HF: not on the flood risk listBH21 4HJ: not on the flood risk listBH21 4HP: not on the flood risk listBH21 4HR: not on the flood risk listBH21 4HS: not on the flood risk listBH21 4HT: not on the flood risk listBH21 4HU: not on the flood risk listBH21 4HW: not on the flood risk listBH21 4HX: not on the flood risk listBH21 4HY: not on the flood risk listBH21 4HZ: not on the flood risk listBH21 4JA: not on the flood risk listBH21 4JB: not on the flood risk listBH21 4JD: not on the flood risk listBH21 4JE: not on the flood risk listBH21 4JF: not on the flood risk listBH21 4JG: not on the flood risk listBH21 4JH: not on the flood risk listBH21 4JJ: not on the flood risk listBH21 4JL: not on the flood risk listBH21 4JN: not on the flood risk listBH21 4JP: not on the flood risk listBH21 4JQ: not on the flood risk listBH21 4JR: not on the flood risk listBH21 4JS: not on the flood risk listBH21 4JT: not on the flood risk listBH21 4JU: not on the flood risk listBH21 4JW: not on the flood risk listBH21 4BH: very low flood risk onlyBH21 4AT: low flood risk at worstBH21 4AU: low flood risk at worstBH21 4AY: low flood risk at worstBH21 4AZ: low flood risk at worstBH21 4BG: low flood risk at worstBH21 4BS: low flood risk at worstBH21 4DE: low flood risk at worstBH21 4ER: low flood risk at worstBH21 4BA: medium flood risk at worstBH21 4BJ: medium flood risk at worstBH21 4BL: medium flood risk at worstBH21 4BP: medium flood risk at worstBH21 4BU: medium flood risk at worstBH21 4BW: medium flood risk at worstBH21 4EJ: medium flood risk at worstBH21 4AD: high flood riskBH21 4AN: high flood riskBH21 4AQ: high flood riskBH21 4BD: high flood riskBH21 4BT: high flood riskBH21 4BX: high flood riskBH21 4BY: high flood riskBH21 4EL: high flood risk Wimborne MinsterMerley 6 postcodes at high or medium risk, outlined: this goes to BH21 4BN, the one with most homes and businesses at high risk6 postcodes at high or medium risk Map of every postcode in the BH21 4 sector, by flood risk Of the 137 postcodes in the BH21 4 sector that ONS places, 8 have a home or business at high risk, 8 are at medium risk at worst, 9 are at low risk at worst, 1 are at very low risk only and 111 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 6 postcodes at high or medium risk. Places named: Wimborne Minster, Merley. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A31 Wimborne MinsterMerley
  • A home or business at high risk: 8
  • At medium risk at worst: 8
  • At low risk at worst: 9
  • At very low risk only: 1
  • Not on the at-risk list: 111
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 137 postcodes in the BH21 4 sector that ONS places, 8 have a home or business at high risk, 8 are at medium risk at worst, 9 are at low risk at worst, 1 are at very low risk only and 111 are not on the Environment Agency's at-risk list.

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. 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.

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; flood risk: Environment Agency, published 6 July 2026; roads, rivers and built-up areas: 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. How we use them

The postcodes at high risk

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

BH21 4EL9 at high riskBH21 4AN6 at high riskBH21 4AQ4 at high riskBH21 4BT3 at high riskBH21 4BX3 at high riskBH21 4BY3 at high riskBH21 4AD2 at high riskBH21 4BD1 at high risk

Where the postcodes at high or medium risk lie together

  • 6 postcodes at high or medium risk, outlined on the map. BH21 4BN, is the one with most homes and businesses at high risk.

What do homes sell for in BH21 4?

Homes in BH21 4 sold for a typical £450,000 in the 12 months to August 2026, across 41 sales, up 2% on the 12 months before, HM Land Registry's figures show.

£450,000 typical price, the 12 months to August 2026
£441,250 12 months to August 2025
▲ up 2% on the 12 months before
  • Detached £562,500 20 sales
  • Semi-detached £400,000 17 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 postcode

Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it

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.

BH21 4AABH21 4ABBH21 4ADBH21 4AEBH21 4AFBH21 4AGBH21 4AHBH21 4AJBH21 4ALBH21 4ANBH21 4APBH21 4AQBH21 4ARBH21 4ASBH21 4ATBH21 4AUBH21 4AWBH21 4AXBH21 4AYBH21 4AZBH21 4BABH21 4BBBH21 4BDBH21 4BEBH21 4BGBH21 4BHBH21 4BJBH21 4BLBH21 4BNBH21 4BPBH21 4BQBH21 4BSBH21 4BTBH21 4BUBH21 4BWBH21 4BXBH21 4BYBH21 4BZBH21 4DBBH21 4DDBH21 4DEBH21 4DGBH21 4DHBH21 4DJBH21 4DLBH21 4DNBH21 4DPBH21 4DQBH21 4DRBH21 4DSBH21 4DTBH21 4DWBH21 4DXBH21 4DYBH21 4DZBH21 4EABH21 4EBBH21 4EDBH21 4EEBH21 4EFBH21 4EGBH21 4EHBH21 4EJBH21 4ELBH21 4ENBH21 4EPBH21 4EQBH21 4ERBH21 4ETBH21 4EUBH21 4EWBH21 4EXBH21 4EYBH21 4EZBH21 4FABH21 4FBBH21 4FDBH21 4FEBH21 4FFBH21 4FGBH21 4FHBH21 4FJBH21 4FLBH21 4FNBH21 4FPBH21 4FQBH21 4FRBH21 4FSBH21 4FTBH21 4FUBH21 4FWBH21 4FXBH21 4FYBH21 4FZBH21 4GABH21 4GBBH21 4GDBH21 4GEBH21 4GFBH21 4GGBH21 4GHBH21 4GJBH21 4HABH21 4HBBH21 4HDBH21 4HEBH21 4HFBH21 4HGBH21 4HHBH21 4HJBH21 4HPBH21 4HQBH21 4HRBH21 4HSBH21 4HTBH21 4HUBH21 4HWBH21 4HXBH21 4HYBH21 4HZBH21 4JABH21 4JBBH21 4JDBH21 4JEBH21 4JFBH21 4JGBH21 4JHBH21 4JJBH21 4JLBH21 4JNBH21 4JPBH21 4JQBH21 4JRBH21 4JSBH21 4JTBH21 4JUBH21 4JW

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed. See all our data sources

What council am I in? The council, borough or local authority for a postcode, and the county council where there is one. What ward am I in? The ward for a postcode, with its council, constituency and parish.

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