BN3 4 postcode sector in the BN3 district

BN3 4 is a sector of the BN3 district: every postcode that starts BN3 4. It has 147 postcodes in use, 4 of them large-user postcodes. 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 BN3 4 sector, by flood risk

Map of every postcode in the BN3 4 sector, by flood risk Of the 147 postcodes in the BN3 4 sector that ONS places, 2 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst and 141 are not on the Environment Agency's at-risk list. 2 postcodes lie beyond the edge and are listed under the map. Places named: Wish, Westbourne & Poets' Corner. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. BN3 4AA: not on the flood risk listBN3 4AB: not on the flood risk listBN3 4AD: not on the flood risk listBN3 4AE: not on the flood risk listBN3 4AG: not on the flood risk listBN3 4AJ: not on the flood risk listBN3 4AP: not on the flood risk listBN3 4AY: not on the flood risk listBN3 4BA: not on the flood risk listBN3 4BB: not on the flood risk listBN3 4BD: not on the flood risk listBN3 4BE: not on the flood risk listBN3 4BF: not on the flood risk listBN3 4BH: not on the flood risk listBN3 4BP: not on the flood risk listBN3 4BQ: not on the flood risk listBN3 4BS: not on the flood risk listBN3 4BT: not on the flood risk listBN3 4DA: not on the flood risk listBN3 4DB: not on the flood risk listBN3 4DL: not on the flood risk listBN3 4DN: not on the flood risk listBN3 4EA: not on the flood risk listBN3 4EB: not on the flood risk listBN3 4ED: not on the flood risk listBN3 4EE: not on the flood risk listBN3 4EF: not on the flood risk listBN3 4EG: not on the flood risk listBN3 4EH: not on the flood risk listBN3 4FB: not on the flood risk listBN3 4FD: not on the flood risk listBN3 4FE: not on the flood risk listBN3 4FF: not on the flood risk listBN3 4FG: not on the flood risk listBN3 4FH: not on the flood risk listBN3 4FJ: not on the flood risk listBN3 4FL: not on the flood risk listBN3 4FN: not on the flood risk listBN3 4FP: not on the flood risk listBN3 4FQ: not on the flood risk listBN3 4FR: not on the flood risk listBN3 4FS: not on the flood risk listBN3 4FT: not on the flood risk listBN3 4FU: not on the flood risk listBN3 4FW: not on the flood risk listBN3 4FX: not on the flood risk listBN3 4FZ: not on the flood risk listBN3 4GA: not on the flood risk listBN3 4GB: not on the flood risk listBN3 4GD: not on the flood risk listBN3 4GE: not on the flood risk listBN3 4GF: not on the flood risk listBN3 4GG: not on the flood risk listBN3 4GH: not on the flood risk listBN3 4GJ: not on the flood risk listBN3 4GL: not on the flood risk listBN3 4GN: not on the flood risk listBN3 4GQ: not on the flood risk listBN3 4GR: not on the flood risk listBN3 4GS: not on the flood risk listBN3 4GT: not on the flood risk listBN3 4GU: not on the flood risk listBN3 4GW: not on the flood risk listBN3 4HA: not on the flood risk listBN3 4HB: not on the flood risk listBN3 4HD: not on the flood risk listBN3 4HE: not on the flood risk listBN3 4HF: not on the flood risk listBN3 4HG: not on the flood risk listBN3 4HH: not on the flood risk listBN3 4HJ: not on the flood risk listBN3 4HL: not on the flood risk listBN3 4HN: not on the flood risk listBN3 4HP: not on the flood risk listBN3 4HQ: not on the flood risk listBN3 4HR: not on the flood risk listBN3 4JA: not on the flood risk listBN3 4JB: not on the flood risk listBN3 4JD: not on the flood risk listBN3 4JE: not on the flood risk listBN3 4JF: not on the flood risk listBN3 4JG: not on the flood risk listBN3 4JH: not on the flood risk listBN3 4JJ: not on the flood risk listBN3 4JL: not on the flood risk listBN3 4JN: not on the flood risk listBN3 4JP: not on the flood risk listBN3 4JQ: not on the flood risk listBN3 4JR: not on the flood risk listBN3 4JS: not on the flood risk listBN3 4JT: not on the flood risk listBN3 4JU: not on the flood risk listBN3 4LA: not on the flood risk listBN3 4LB: not on the flood risk listBN3 4LD: not on the flood risk listBN3 4LE: not on the flood risk listBN3 4LF: not on the flood risk listBN3 4LG: not on the flood risk listBN3 4LH: not on the flood risk listBN3 4LJ: not on the flood risk listBN3 4LL: not on the flood risk listBN3 4LN: not on the flood risk listBN3 4LP: not on the flood risk listBN3 4LQ: not on the flood risk listBN3 4LR: not on the flood risk listBN3 4LS: not on the flood risk listBN3 4LT: not on the flood risk listBN3 4LU: not on the flood risk listBN3 4ND: not on the flood risk listBN3 4PA: not on the flood risk listBN3 4PB: not on the flood risk listBN3 4PD: not on the flood risk listBN3 4PE: not on the flood risk listBN3 4PF: not on the flood risk listBN3 4PG: not on the flood risk listBN3 4PH: not on the flood risk listBN3 4PJ: not on the flood risk listBN3 4PL: not on the flood risk listBN3 4PN: not on the flood risk listBN3 4PP: not on the flood risk listBN3 4QA: not on the flood risk listBN3 4QB: not on the flood risk listBN3 4QD: not on the flood risk listBN3 4QE: not on the flood risk listBN3 4QF: not on the flood risk listBN3 4QG: not on the flood risk listBN3 4QH: not on the flood risk listBN3 4QJ: not on the flood risk listBN3 4QL: not on the flood risk listBN3 4QN: not on the flood risk listBN3 4QP: not on the flood risk listBN3 4QQ: not on the flood risk listBN3 4QR: not on the flood risk listBN3 4QS: not on the flood risk listBN3 4QU: not on the flood risk listBN3 4QW: not on the flood risk listBN3 4RA: not on the flood risk listBN3 4FA: low flood risk at worstBN3 4LW: low flood risk at worstBN3 4PQ: low flood risk at worstBN3 4LX: medium flood risk at worstBN3 4GP: high flood riskBN3 4QT: high flood risk WishWestbourne & Poets' Corner Map of every postcode in the BN3 4 sector, by flood risk Of the 147 postcodes in the BN3 4 sector that ONS places, 2 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst and 141 are not on the Environment Agency's at-risk list. 2 postcodes lie beyond the edge and are listed under the map. Places named: Wish, Westbourne & Poets' Corner. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. WishWestbourne & Poets' Corner
  • A home or business at high risk: 2
  • At medium risk at worst: 1
  • At low risk at worst: 3
  • At very low risk only: 0
  • Not on the at-risk list: 141

Of the 147 postcodes in the BN3 4 sector that ONS places, 2 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst and 141 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. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode. Names in italics are council wards: we hold no town or village names here.

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.

BN3 4QT2 at high riskBN3 4GP1 at high risk

2 further out, not drawn

These postcodes lie well apart from the rest, so the map is drawn without them to show the rest closer; they are in every count.

BN3 4AHBN3 4PY

What do homes sell for in BN3 4?

Homes in BN3 4 sold for a typical £475,000 in the 12 months to August 2026, across 100 sales, down 8.7% on the 12 months before, HM Land Registry's figures show.

£475,000 typical price, the 12 months to August 2026
£520,000 12 months to August 2025
▼ down 8.7% on the 12 months before
  • Detached £1,043,750 10 sales
  • Semi-detached £935,000 25 sales
  • Terraced £671,000 6 sales
  • Flat or maisonette £330,000 59 sales

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 BN3 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 BN3 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.

BN3 4AABN3 4ABBN3 4ADBN3 4AEBN3 4AFBN3 4AGBN3 4AHBN3 4AJBN3 4APBN3 4AYBN3 4BABN3 4BBBN3 4BDBN3 4BEBN3 4BFBN3 4BHBN3 4BPBN3 4BQBN3 4BSBN3 4BTBN3 4DABN3 4DBBN3 4DLBN3 4DNBN3 4EABN3 4EBBN3 4EDBN3 4EEBN3 4EFBN3 4EGBN3 4EHBN3 4FABN3 4FBBN3 4FDBN3 4FEBN3 4FFBN3 4FGBN3 4FHBN3 4FJBN3 4FLBN3 4FNBN3 4FPBN3 4FQBN3 4FRBN3 4FSBN3 4FTBN3 4FUBN3 4FWBN3 4FXBN3 4FZBN3 4GABN3 4GBBN3 4GDBN3 4GEBN3 4GFBN3 4GGBN3 4GHBN3 4GJBN3 4GLBN3 4GNBN3 4GPBN3 4GQBN3 4GRBN3 4GSBN3 4GTBN3 4GUBN3 4GWBN3 4HABN3 4HBBN3 4HDBN3 4HEBN3 4HFBN3 4HGBN3 4HHBN3 4HJBN3 4HLBN3 4HNBN3 4HPBN3 4HQBN3 4HRBN3 4JABN3 4JBBN3 4JDBN3 4JEBN3 4JFBN3 4JGBN3 4JHBN3 4JJBN3 4JLBN3 4JNBN3 4JPBN3 4JQBN3 4JRBN3 4JSBN3 4JTBN3 4JUBN3 4LABN3 4LBBN3 4LDBN3 4LEBN3 4LFBN3 4LGBN3 4LHBN3 4LJBN3 4LLBN3 4LNBN3 4LPBN3 4LQBN3 4LRBN3 4LSBN3 4LTBN3 4LUBN3 4LWBN3 4LXBN3 4NDBN3 4PABN3 4PBBN3 4PDBN3 4PEBN3 4PFBN3 4PGBN3 4PHBN3 4PJBN3 4PLBN3 4PNBN3 4PPBN3 4PQBN3 4PYBN3 4QABN3 4QBBN3 4QDBN3 4QEBN3 4QFBN3 4QGBN3 4QHBN3 4QJBN3 4QLBN3 4QNBN3 4QPBN3 4QQBN3 4QRBN3 4QSBN3 4QTBN3 4QUBN3 4QWBN3 4RABN3 4RB

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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