BN42 4 postcode sector in the BN42 district

BN42 4 is a sector of the BN42 district: every postcode that starts BN42 4. It has 219 postcodes in use, 6 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 BN42 4 sector, by flood risk

Map of every postcode in the BN42 4 sector, by flood risk Of the 219 postcodes in the BN42 4 sector that ONS places, 2 are at medium risk at worst, 5 are at low risk at worst and 212 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: Southwick. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. BN42 4AA: not on the flood risk listBN42 4AB: not on the flood risk listBN42 4AD: not on the flood risk listBN42 4AE: not on the flood risk listBN42 4AF: not on the flood risk listBN42 4AG: not on the flood risk listBN42 4AJ: not on the flood risk listBN42 4AL: not on the flood risk listBN42 4AN: not on the flood risk listBN42 4AP: not on the flood risk listBN42 4AQ: not on the flood risk listBN42 4AR: not on the flood risk listBN42 4AS: not on the flood risk listBN42 4AT: not on the flood risk listBN42 4AU: not on the flood risk listBN42 4AX: not on the flood risk listBN42 4AY: not on the flood risk listBN42 4AZ: not on the flood risk listBN42 4BA: not on the flood risk listBN42 4BB: not on the flood risk listBN42 4BF: not on the flood risk listBN42 4BR: not on the flood risk listBN42 4BS: not on the flood risk listBN42 4BT: not on the flood risk listBN42 4BU: not on the flood risk listBN42 4BX: not on the flood risk listBN42 4BY: not on the flood risk listBN42 4BZ: not on the flood risk listBN42 4DA: not on the flood risk listBN42 4DB: not on the flood risk listBN42 4DD: not on the flood risk listBN42 4DE: not on the flood risk listBN42 4DF: not on the flood risk listBN42 4DG: not on the flood risk listBN42 4DJ: not on the flood risk listBN42 4DL: not on the flood risk listBN42 4DQ: not on the flood risk listBN42 4DR: not on the flood risk listBN42 4DS: not on the flood risk listBN42 4DT: not on the flood risk listBN42 4DU: not on the flood risk listBN42 4DW: not on the flood risk listBN42 4DX: not on the flood risk listBN42 4DY: not on the flood risk listBN42 4DZ: not on the flood risk listBN42 4ED: not on the flood risk listBN42 4EP: not on the flood risk listBN42 4FB: not on the flood risk listBN42 4FJ: not on the flood risk listBN42 4FL: not on the flood risk listBN42 4FN: not on the flood risk listBN42 4FP: not on the flood risk listBN42 4FR: not on the flood risk listBN42 4FS: not on the flood risk listBN42 4FT: not on the flood risk listBN42 4FU: not on the flood risk listBN42 4FW: not on the flood risk listBN42 4FX: not on the flood risk listBN42 4FY: not on the flood risk listBN42 4FZ: not on the flood risk listBN42 4GA: not on the flood risk listBN42 4GB: not on the flood risk listBN42 4GD: not on the flood risk listBN42 4GE: not on the flood risk listBN42 4GF: not on the flood risk listBN42 4GG: not on the flood risk listBN42 4GH: not on the flood risk listBN42 4GJ: not on the flood risk listBN42 4GR: not on the flood risk listBN42 4GS: not on the flood risk listBN42 4HA: not on the flood risk listBN42 4HB: not on the flood risk listBN42 4HD: not on the flood risk listBN42 4HE: not on the flood risk listBN42 4HF: not on the flood risk listBN42 4HG: not on the flood risk listBN42 4HH: not on the flood risk listBN42 4HJ: not on the flood risk listBN42 4HL: not on the flood risk listBN42 4HN: not on the flood risk listBN42 4HP: not on the flood risk listBN42 4HQ: not on the flood risk listBN42 4HR: not on the flood risk listBN42 4HS: not on the flood risk listBN42 4HT: not on the flood risk listBN42 4HU: not on the flood risk listBN42 4HW: not on the flood risk listBN42 4JD: not on the flood risk listBN42 4LA: not on the flood risk listBN42 4LB: not on the flood risk listBN42 4LD: not on the flood risk listBN42 4LE: not on the flood risk listBN42 4LF: not on the flood risk listBN42 4LG: not on the flood risk listBN42 4LH: not on the flood risk listBN42 4LJ: not on the flood risk listBN42 4LL: not on the flood risk listBN42 4LN: not on the flood risk listBN42 4LP: not on the flood risk listBN42 4LQ: not on the flood risk listBN42 4LR: not on the flood risk listBN42 4LS: not on the flood risk listBN42 4LT: not on the flood risk listBN42 4NA: not on the flood risk listBN42 4NB: not on the flood risk listBN42 4ND: not on the flood risk listBN42 4NE: not on the flood risk listBN42 4NF: not on the flood risk listBN42 4NG: not on the flood risk listBN42 4NH: not on the flood risk listBN42 4NJ: not on the flood risk listBN42 4NL: not on the flood risk listBN42 4NN: not on the flood risk listBN42 4NP: not on the flood risk listBN42 4NQ: not on the flood risk listBN42 4NR: not on the flood risk listBN42 4NS: not on the flood risk listBN42 4NT: not on the flood risk listBN42 4NU: not on the flood risk listBN42 4NW: not on the flood risk listBN42 4NX: not on the flood risk listBN42 4NY: not on the flood risk listBN42 4PQ: not on the flood risk listBN42 4PR: not on the flood risk listBN42 4PS: not on the flood risk listBN42 4PT: not on the flood risk listBN42 4PU: not on the flood risk listBN42 4QB: not on the flood risk listBN42 4QD: not on the flood risk listBN42 4QE: not on the flood risk listBN42 4QF: not on the flood risk listBN42 4QG: not on the flood risk listBN42 4QH: not on the flood risk listBN42 4QJ: not on the flood risk listBN42 4QL: not on the flood risk listBN42 4QN: not on the flood risk listBN42 4QP: not on the flood risk listBN42 4QQ: not on the flood risk listBN42 4QR: not on the flood risk listBN42 4QS: not on the flood risk listBN42 4QT: not on the flood risk listBN42 4QU: not on the flood risk listBN42 4QW: not on the flood risk listBN42 4RB: not on the flood risk listBN42 4RD: not on the flood risk listBN42 4RE: not on the flood risk listBN42 4RF: not on the flood risk listBN42 4RG: not on the flood risk listBN42 4RH: not on the flood risk listBN42 4RJ: not on the flood risk listBN42 4RL: not on the flood risk listBN42 4RN: not on the flood risk listBN42 4RP: not on the flood risk listBN42 4RQ: not on the flood risk listBN42 4RR: not on the flood risk listBN42 4RS: not on the flood risk listBN42 4RT: not on the flood risk listBN42 4RU: not on the flood risk listBN42 4RW: not on the flood risk listBN42 4RX: not on the flood risk listBN42 4RY: not on the flood risk listBN42 4SJ: not on the flood risk listBN42 4SL: not on the flood risk listBN42 4SN: not on the flood risk listBN42 4SP: not on the flood risk listBN42 4SQ: not on the flood risk listBN42 4SR: not on the flood risk listBN42 4TA: not on the flood risk listBN42 4TB: not on the flood risk listBN42 4TE: not on the flood risk listBN42 4TF: not on the flood risk listBN42 4TG: not on the flood risk listBN42 4TH: not on the flood risk listBN42 4TJ: not on the flood risk listBN42 4TL: not on the flood risk listBN42 4TN: not on the flood risk listBN42 4TP: not on the flood risk listBN42 4TQ: not on the flood risk listBN42 4TR: not on the flood risk listBN42 4TS: not on the flood risk listBN42 4TT: not on the flood risk listBN42 4TU: not on the flood risk listBN42 4TW: not on the flood risk listBN42 4TX: not on the flood risk listBN42 4TY: not on the flood risk listBN42 4TZ: not on the flood risk listBN42 4WA: not on the flood risk listBN42 4WB: not on the flood risk listBN42 4WD: not on the flood risk listBN42 4WE: not on the flood risk listBN42 4WF: not on the flood risk listBN42 4WG: not on the flood risk listBN42 4WH: not on the flood risk listBN42 4WJ: not on the flood risk listBN42 4WL: not on the flood risk listBN42 4WN: not on the flood risk listBN42 4WP: not on the flood risk listBN42 4WQ: not on the flood risk listBN42 4YA: not on the flood risk listBN42 4YB: not on the flood risk listBN42 4YD: not on the flood risk listBN42 4YE: not on the flood risk listBN42 4YF: not on the flood risk listBN42 4YG: not on the flood risk listBN42 4YH: not on the flood risk listBN42 4YJ: not on the flood risk listBN42 4YL: not on the flood risk listBN42 4YN: not on the flood risk listBN42 4YP: not on the flood risk listBN42 4YQ: not on the flood risk listBN42 4AW: low flood risk at worstBN42 4BW: low flood risk at worstBN42 4DH: low flood risk at worstBN42 4DN: low flood risk at worstBN42 4EG: low flood risk at worstBN42 4DP: medium flood risk at worstBN42 4EN: medium flood risk at worst Southwick Map of every postcode in the BN42 4 sector, by flood risk Of the 219 postcodes in the BN42 4 sector that ONS places, 2 are at medium risk at worst, 5 are at low risk at worst and 212 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: Southwick. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. Southwick
  • A home or business at high risk: 0
  • At medium risk at worst: 2
  • At low risk at worst: 5
  • At very low risk only: 0
  • Not on the at-risk list: 212

Of the 219 postcodes in the BN42 4 sector that ONS places, 2 are at medium risk at worst, 5 are at low risk at worst and 212 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.

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 medium risk at worst

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

BN42 4DP7 at medium riskBN42 4EN3 at medium risk

Further out, not drawn

This postcode lies well apart from the rest, so the map is drawn without it to show the rest closer; it is in every count.

BN42 4XZ

What do homes sell for in BN42 4?

Homes in BN42 4 sold for a typical £450,000 in the 12 months to August 2026, across 107 sales, up 5.9% on the 12 months before, HM Land Registry's figures show.

£450,000 typical price, the 12 months to August 2026
£425,000 12 months to August 2025
▲ up 5.9% on the 12 months before
  • Detached £480,500 22 sales
  • Semi-detached £475,000 53 sales
  • Terraced £425,000 23 sales
  • Flat or maisonette £270,000 9 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 BN42 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 BN42 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.

BN42 4AABN42 4ABBN42 4ADBN42 4AEBN42 4AFBN42 4AGBN42 4AJBN42 4ALBN42 4ANBN42 4APBN42 4AQBN42 4ARBN42 4ASBN42 4ATBN42 4AUBN42 4AWBN42 4AXBN42 4AYBN42 4AZBN42 4BABN42 4BBBN42 4BFBN42 4BRBN42 4BSBN42 4BTBN42 4BUBN42 4BWBN42 4BXBN42 4BYBN42 4BZBN42 4DABN42 4DBBN42 4DDBN42 4DEBN42 4DFBN42 4DGBN42 4DHBN42 4DJBN42 4DLBN42 4DNBN42 4DPBN42 4DQBN42 4DRBN42 4DSBN42 4DTBN42 4DUBN42 4DWBN42 4DXBN42 4DYBN42 4DZBN42 4EDBN42 4EGBN42 4ENBN42 4EPBN42 4FBBN42 4FJBN42 4FLBN42 4FNBN42 4FPBN42 4FQBN42 4FRBN42 4FSBN42 4FTBN42 4FUBN42 4FWBN42 4FXBN42 4FYBN42 4FZBN42 4GABN42 4GBBN42 4GDBN42 4GEBN42 4GFBN42 4GGBN42 4GHBN42 4GJBN42 4GRBN42 4GSBN42 4HABN42 4HBBN42 4HDBN42 4HEBN42 4HFBN42 4HGBN42 4HHBN42 4HJBN42 4HLBN42 4HNBN42 4HPBN42 4HQBN42 4HRBN42 4HSBN42 4HTBN42 4HUBN42 4HWBN42 4JDBN42 4LABN42 4LBBN42 4LDBN42 4LEBN42 4LFBN42 4LGBN42 4LHBN42 4LJBN42 4LLBN42 4LNBN42 4LPBN42 4LQBN42 4LRBN42 4LSBN42 4LTBN42 4NABN42 4NBBN42 4NDBN42 4NEBN42 4NFBN42 4NGBN42 4NHBN42 4NJBN42 4NLBN42 4NNBN42 4NPBN42 4NQBN42 4NRBN42 4NSBN42 4NTBN42 4NUBN42 4NWBN42 4NXBN42 4NYBN42 4PQBN42 4PRBN42 4PSBN42 4PTBN42 4PUBN42 4QBBN42 4QDBN42 4QEBN42 4QFBN42 4QGBN42 4QHBN42 4QJBN42 4QLBN42 4QNBN42 4QPBN42 4QQBN42 4QRBN42 4QSBN42 4QTBN42 4QUBN42 4QWBN42 4RBBN42 4RDBN42 4REBN42 4RFBN42 4RGBN42 4RHBN42 4RJBN42 4RLBN42 4RNBN42 4RPBN42 4RQBN42 4RRBN42 4RSBN42 4RTBN42 4RUBN42 4RWBN42 4RXBN42 4RYBN42 4SJBN42 4SLBN42 4SNBN42 4SPBN42 4SQBN42 4SRBN42 4TABN42 4TBBN42 4TEBN42 4TFBN42 4TGBN42 4THBN42 4TJBN42 4TLBN42 4TNBN42 4TPBN42 4TQBN42 4TRBN42 4TSBN42 4TTBN42 4TUBN42 4TWBN42 4TXBN42 4TYBN42 4TZBN42 4WABN42 4WBBN42 4WDBN42 4WEBN42 4WFBN42 4WGBN42 4WHBN42 4WJBN42 4WLBN42 4WNBN42 4WPBN42 4WQBN42 4XZBN42 4YABN42 4YBBN42 4YDBN42 4YEBN42 4YFBN42 4YGBN42 4YHBN42 4YJBN42 4YLBN42 4YNBN42 4YPBN42 4YQ

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.

Check a postcode

Something wrong on this page? Report an error and we will check it against the source.