BN18 9 postcode sector in the BN18 district

BN18 9 is a sector of the BN18 district: every postcode that starts BN18 9. It has 216 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 BN18 9 sector, by flood risk

Map of every postcode in the BN18 9 sector, by flood risk Of the 216 postcodes in the BN18 9 sector that ONS places, 42 have a home or business at high risk, 12 are at medium risk at worst, 7 are at low risk at worst, 1 are at very low risk only and 154 are not on the Environment Agency's at-risk list. 2 groups of postcodes at high or medium risk are outlined: 14 postcodes at high or medium risk; 11 postcodes at high or medium risk. Places named: Arundel. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A29A27A284 BN18 9AA: not on the flood risk listBN18 9AB: not on the flood risk listBN18 9AD: not on the flood risk listBN18 9AG: not on the flood risk listBN18 9AH: not on the flood risk listBN18 9AJ: not on the flood risk listBN18 9AP: not on the flood risk listBN18 9AR: not on the flood risk listBN18 9AS: not on the flood risk listBN18 9AT: not on the flood risk listBN18 9AU: not on the flood risk listBN18 9AX: not on the flood risk listBN18 9AY: not on the flood risk listBN18 9BA: not on the flood risk listBN18 9BD: not on the flood risk listBN18 9BE: not on the flood risk listBN18 9BG: not on the flood risk listBN18 9BH: not on the flood risk listBN18 9BJ: not on the flood risk listBN18 9BL: not on the flood risk listBN18 9BP: not on the flood risk listBN18 9BQ: not on the flood risk listBN18 9BS: not on the flood risk listBN18 9BT: not on the flood risk listBN18 9BU: not on the flood risk listBN18 9BZ: not on the flood risk listBN18 9DA: not on the flood risk listBN18 9DD: not on the flood risk listBN18 9DE: not on the flood risk listBN18 9DG: not on the flood risk listBN18 9DL: not on the flood risk listBN18 9ED: not on the flood risk listBN18 9EE: not on the flood risk listBN18 9EF: not on the flood risk listBN18 9EH: not on the flood risk listBN18 9EJ: not on the flood risk listBN18 9EL: not on the flood risk listBN18 9EN: not on the flood risk listBN18 9EP: not on the flood risk listBN18 9EQ: not on the flood risk listBN18 9ER: not on the flood risk listBN18 9ES: not on the flood risk listBN18 9ET: not on the flood risk listBN18 9EW: not on the flood risk listBN18 9FD: not on the flood risk listBN18 9FH: not on the flood risk listBN18 9FJ: not on the flood risk listBN18 9GA: not on the flood risk listBN18 9GG: not on the flood risk listBN18 9GJ: not on the flood risk listBN18 9GL: not on the flood risk listBN18 9GP: not on the flood risk listBN18 9GQ: not on the flood risk listBN18 9HD: not on the flood risk listBN18 9HE: not on the flood risk listBN18 9HF: not on the flood risk listBN18 9HG: not on the flood risk listBN18 9HH: not on the flood risk listBN18 9HJ: not on the flood risk listBN18 9HL: not on the flood risk listBN18 9HN: not on the flood risk listBN18 9HP: not on the flood risk listBN18 9HR: not on the flood risk listBN18 9HS: not on the flood risk listBN18 9HU: not on the flood risk listBN18 9HW: not on the flood risk listBN18 9HX: not on the flood risk listBN18 9HY: not on the flood risk listBN18 9HZ: not on the flood risk listBN18 9JB: not on the flood risk listBN18 9JD: not on the flood risk listBN18 9JE: not on the flood risk listBN18 9JX: not on the flood risk listBN18 9LB: not on the flood risk listBN18 9LG: not on the flood risk listBN18 9LJ: not on the flood risk listBN18 9LL: not on the flood risk listBN18 9LN: not on the flood risk listBN18 9LX: not on the flood risk listBN18 9LY: not on the flood risk listBN18 9LZ: not on the flood risk listBN18 9NE: not on the flood risk listBN18 9NG: not on the flood risk listBN18 9NH: not on the flood risk listBN18 9NJ: not on the flood risk listBN18 9NL: not on the flood risk listBN18 9NP: not on the flood risk listBN18 9NR: not on the flood risk listBN18 9NS: not on the flood risk listBN18 9NT: not on the flood risk listBN18 9NW: not on the flood risk listBN18 9NX: not on the flood risk listBN18 9NY: not on the flood risk listBN18 9NZ: not on the flood risk listBN18 9PE: not on the flood risk listBN18 9PG: not on the flood risk listBN18 9PJ: not on the flood risk listBN18 9PL: not on the flood risk listBN18 9PN: not on the flood risk listBN18 9PP: not on the flood risk listBN18 9PQ: not on the flood risk listBN18 9PR: not on the flood risk listBN18 9PS: not on the flood risk listBN18 9PU: not on the flood risk listBN18 9PW: not on the flood risk listBN18 9PX: not on the flood risk listBN18 9PY: not on the flood risk listBN18 9PZ: not on the flood risk listBN18 9QA: not on the flood risk listBN18 9QB: not on the flood risk listBN18 9QD: not on the flood risk listBN18 9QE: not on the flood risk listBN18 9QG: not on the flood risk listBN18 9QH: not on the flood risk listBN18 9QJ: not on the flood risk listBN18 9QU: not on the flood risk listBN18 9QW: not on the flood risk listBN18 9QX: not on the flood risk listBN18 9QZ: not on the flood risk listBN18 9RA: not on the flood risk listBN18 9RB: not on the flood risk listBN18 9RF: not on the flood risk listBN18 9RJ: not on the flood risk listBN18 9RL: not on the flood risk listBN18 9RN: not on the flood risk listBN18 9RQ: not on the flood risk listBN18 9RR: not on the flood risk listBN18 9RS: not on the flood risk listBN18 9RU: not on the flood risk listBN18 9RW: not on the flood risk listBN18 9QL: very low flood risk onlyBN18 9DP: low flood risk at worstBN18 9DW: low flood risk at worstBN18 9EG: low flood risk at worstBN18 9JT: low flood risk at worstBN18 9PH: low flood risk at worstBN18 9PT: low flood risk at worstBN18 9DT: medium flood risk at worstBN18 9DU: medium flood risk at worstBN18 9LE: medium flood risk at worstBN18 9FL: medium flood risk at worstBN18 9FN: medium flood risk at worstBN18 9JQ: medium flood risk at worstBN18 9JU: medium flood risk at worstBN18 9LT: medium flood risk at worstBN18 9PD: medium flood risk at worstBN18 9TA: medium flood risk at worstBN18 9DF: high flood riskBN18 9DH: high flood riskBN18 9DX: high flood riskBN18 9EB: high flood riskBN18 9EU: high flood riskBN18 9EX: high flood riskBN18 9EY: high flood riskBN18 9FF: high flood riskBN18 9GY: high flood riskBN18 9JF: high flood riskBN18 9JG: high flood riskBN18 9JJ: high flood riskBN18 9JL: high flood riskBN18 9JN: high flood riskBN18 9JP: high flood riskBN18 9JS: high flood riskBN18 9JY: high flood riskBN18 9JZ: high flood riskBN18 9LF: high flood riskBN18 9LP: high flood riskBN18 9LR: high flood riskBN18 9LS: high flood riskBN18 9LU: high flood riskBN18 9LW: high flood riskBN18 9NA: high flood riskBN18 9NB: high flood riskBN18 9ND: high flood riskBN18 9NF: high flood riskBN18 9NN: high flood riskBN18 9NQ: high flood riskBN18 9PA: high flood riskBN18 9PB: high flood riskBN18 9PF: high flood riskBN18 9QN: high flood riskBN18 9QT: high flood riskBN18 9QY: high flood riskBN18 9RD: high flood riskBN18 9RE: high flood riskBN18 9RH: high flood riskBN18 9SA: high flood riskBN18 9SR: high flood riskBN18 9SU: high flood risk Arundel 14 postcodes at high or medium risk, outlined: this goes to BN18 9JP, the one with most homes and businesses at high risk14 postcodes at high or medium risk11 postcodes at high or medium risk, outlined: this goes to BN18 9JN, the one with most homes and businesses at high risk11 postcodes at high or medium risk Map of every postcode in the BN18 9 sector, by flood risk Of the 216 postcodes in the BN18 9 sector that ONS places, 42 have a home or business at high risk, 12 are at medium risk at worst, 7 are at low risk at worst, 1 are at very low risk only and 154 are not on the Environment Agency's at-risk list. 2 groups of postcodes at high or medium risk are outlined: 14 postcodes at high or medium risk; 11 postcodes at high or medium risk. Places named: Arundel. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A284A29 Arundel
  • A home or business at high risk: 42
  • At medium risk at worst: 12
  • At low risk at worst: 7
  • At very low risk only: 1
  • Not on the at-risk list: 154
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 216 postcodes in the BN18 9 sector that ONS places, 42 have a home or business at high risk, 12 are at medium risk at worst, 7 are at low risk at worst, 1 are at very low risk only and 154 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 150 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

42 postcodes here have a home or business at high risk. These are the 12 with the most homes and businesses at that risk.

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

BN18 9JP38 at high riskBN18 9JZ35 at high riskBN18 9SA21 at high riskBN18 9JN21 at high riskBN18 9JL20 at high riskBN18 9FF17 at high riskBN18 9JJ15 at high riskBN18 9EX15 at high riskBN18 9GY14 at high riskBN18 9PA13 at high riskBN18 9PB10 at high riskBN18 9JG6 at high risk

Where the postcodes at high or medium risk lie together

  • 14 postcodes at high or medium risk, outlined on the map. BN18 9JP, is the one with most homes and businesses at high risk.
  • 11 postcodes at high or medium risk, outlined on the map. BN18 9JN, is the one with most homes and businesses at high risk.

What do homes sell for in BN18 9?

Homes in BN18 9 sold for a typical £495,000 in the 12 months to August 2026, across 75 sales, up 16.5% on the 12 months before, HM Land Registry's figures show.

£495,000 typical price, the 12 months to August 2026
£425,000 12 months to August 2025
▲ up 16.5% on the 12 months before
  • Detached £825,000 19 sales
  • Semi-detached £452,500 16 sales
  • Terraced £450,000 27 sales
  • Flat or maisonette £243,000 13 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 BN18 9. 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 BN18 9

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.

BN18 9AABN18 9ABBN18 9ADBN18 9AGBN18 9AHBN18 9AJBN18 9APBN18 9ARBN18 9ASBN18 9ATBN18 9AUBN18 9AXBN18 9AYBN18 9AZBN18 9BABN18 9BBBN18 9BDBN18 9BEBN18 9BGBN18 9BHBN18 9BJBN18 9BLBN18 9BNBN18 9BPBN18 9BQBN18 9BSBN18 9BTBN18 9BUBN18 9BWBN18 9BZBN18 9DABN18 9DDBN18 9DEBN18 9DFBN18 9DGBN18 9DHBN18 9DJBN18 9DLBN18 9DNBN18 9DPBN18 9DQBN18 9DRBN18 9DSBN18 9DTBN18 9DUBN18 9DWBN18 9DXBN18 9EABN18 9EBBN18 9EDBN18 9EEBN18 9EFBN18 9EGBN18 9EHBN18 9EJBN18 9ELBN18 9ENBN18 9EPBN18 9EQBN18 9ERBN18 9ESBN18 9ETBN18 9EUBN18 9EWBN18 9EXBN18 9EYBN18 9FABN18 9FDBN18 9FEBN18 9FFBN18 9FGBN18 9FHBN18 9FJBN18 9FLBN18 9FNBN18 9GABN18 9GGBN18 9GJBN18 9GLBN18 9GNBN18 9GPBN18 9GQBN18 9GYBN18 9HDBN18 9HEBN18 9HFBN18 9HGBN18 9HHBN18 9HJBN18 9HLBN18 9HNBN18 9HPBN18 9HRBN18 9HSBN18 9HTBN18 9HUBN18 9HWBN18 9HXBN18 9HYBN18 9HZBN18 9JABN18 9JBBN18 9JDBN18 9JEBN18 9JFBN18 9JGBN18 9JHBN18 9JJBN18 9JLBN18 9JNBN18 9JPBN18 9JQBN18 9JRBN18 9JSBN18 9JTBN18 9JUBN18 9JWBN18 9JXBN18 9JYBN18 9JZBN18 9LABN18 9LBBN18 9LEBN18 9LFBN18 9LGBN18 9LHBN18 9LJBN18 9LLBN18 9LNBN18 9LPBN18 9LRBN18 9LSBN18 9LTBN18 9LUBN18 9LWBN18 9LXBN18 9LYBN18 9LZBN18 9NABN18 9NBBN18 9NDBN18 9NEBN18 9NFBN18 9NGBN18 9NHBN18 9NJBN18 9NLBN18 9NNBN18 9NPBN18 9NQBN18 9NRBN18 9NSBN18 9NTBN18 9NWBN18 9NXBN18 9NYBN18 9NZBN18 9PABN18 9PBBN18 9PDBN18 9PEBN18 9PFBN18 9PGBN18 9PHBN18 9PJBN18 9PLBN18 9PNBN18 9PPBN18 9PQBN18 9PRBN18 9PSBN18 9PTBN18 9PUBN18 9PWBN18 9PXBN18 9PYBN18 9PZBN18 9QABN18 9QBBN18 9QDBN18 9QEBN18 9QFBN18 9QGBN18 9QHBN18 9QJBN18 9QLBN18 9QNBN18 9QQBN18 9QTBN18 9QUBN18 9QWBN18 9QXBN18 9QYBN18 9QZBN18 9RABN18 9RBBN18 9RDBN18 9REBN18 9RFBN18 9RGBN18 9RHBN18 9RJBN18 9RLBN18 9RNBN18 9RQBN18 9RRBN18 9RSBN18 9RUBN18 9RWBN18 9RZBN18 9SABN18 9SRBN18 9SUBN18 9TABN18 9XABN18 9YQ

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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