PO21 4 postcode sector in the PO21 district

PO21 4 is a sector of the PO21 district: every postcode that starts PO21 4. It has 270 postcodes in use, 2 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 PO21 4 sector, by flood risk

Map of every postcode in the PO21 4 sector, by flood risk Of the 270 postcodes in the PO21 4 sector that ONS places, 2 have a home or business at high risk, 18 are at low risk at worst, 15 are at very low risk only and 235 are not on the Environment Agency's at-risk list. 2 postcodes lie beyond the edge and are listed under the map. Places named: Pagham, Aldwick West. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. PO21 4AB: not on the flood risk listPO21 4AE: not on the flood risk listPO21 4AF: not on the flood risk listPO21 4AG: not on the flood risk listPO21 4AP: not on the flood risk listPO21 4AQ: not on the flood risk listPO21 4AR: not on the flood risk listPO21 4AT: not on the flood risk listPO21 4AU: not on the flood risk listPO21 4AX: not on the flood risk listPO21 4AY: not on the flood risk listPO21 4AZ: not on the flood risk listPO21 4BA: not on the flood risk listPO21 4BB: not on the flood risk listPO21 4BD: not on the flood risk listPO21 4BE: not on the flood risk listPO21 4BF: not on the flood risk listPO21 4BG: not on the flood risk listPO21 4BH: not on the flood risk listPO21 4BJ: not on the flood risk listPO21 4BL: not on the flood risk listPO21 4BN: not on the flood risk listPO21 4BP: not on the flood risk listPO21 4BQ: not on the flood risk listPO21 4BT: not on the flood risk listPO21 4BU: not on the flood risk listPO21 4BW: not on the flood risk listPO21 4BX: not on the flood risk listPO21 4BY: not on the flood risk listPO21 4BZ: not on the flood risk listPO21 4DA: not on the flood risk listPO21 4DB: not on the flood risk listPO21 4DD: not on the flood risk listPO21 4DE: not on the flood risk listPO21 4DF: not on the flood risk listPO21 4DG: not on the flood risk listPO21 4DH: not on the flood risk listPO21 4DJ: not on the flood risk listPO21 4DL: not on the flood risk listPO21 4DN: not on the flood risk listPO21 4DP: not on the flood risk listPO21 4DQ: not on the flood risk listPO21 4DR: not on the flood risk listPO21 4DS: not on the flood risk listPO21 4DT: not on the flood risk listPO21 4DU: not on the flood risk listPO21 4DW: not on the flood risk listPO21 4DX: not on the flood risk listPO21 4DY: not on the flood risk listPO21 4DZ: not on the flood risk listPO21 4EA: not on the flood risk listPO21 4EB: not on the flood risk listPO21 4ED: not on the flood risk listPO21 4EE: not on the flood risk listPO21 4EF: not on the flood risk listPO21 4EG: not on the flood risk listPO21 4EH: not on the flood risk listPO21 4EJ: not on the flood risk listPO21 4EL: not on the flood risk listPO21 4EN: not on the flood risk listPO21 4EP: not on the flood risk listPO21 4EQ: not on the flood risk listPO21 4ER: not on the flood risk listPO21 4ES: not on the flood risk listPO21 4ET: not on the flood risk listPO21 4EU: not on the flood risk listPO21 4EW: not on the flood risk listPO21 4EX: not on the flood risk listPO21 4EY: not on the flood risk listPO21 4EZ: not on the flood risk listPO21 4FB: not on the flood risk listPO21 4FD: not on the flood risk listPO21 4FE: not on the flood risk listPO21 4FH: not on the flood risk listPO21 4HA: not on the flood risk listPO21 4HB: not on the flood risk listPO21 4HD: not on the flood risk listPO21 4HE: not on the flood risk listPO21 4HF: not on the flood risk listPO21 4HG: not on the flood risk listPO21 4HH: not on the flood risk listPO21 4HJ: not on the flood risk listPO21 4HL: not on the flood risk listPO21 4HN: not on the flood risk listPO21 4HP: not on the flood risk listPO21 4HQ: not on the flood risk listPO21 4HR: not on the flood risk listPO21 4HS: not on the flood risk listPO21 4HT: not on the flood risk listPO21 4HU: not on the flood risk listPO21 4HW: not on the flood risk listPO21 4HX: not on the flood risk listPO21 4JA: not on the flood risk listPO21 4JB: not on the flood risk listPO21 4JD: not on the flood risk listPO21 4JE: not on the flood risk listPO21 4JF: not on the flood risk listPO21 4JG: not on the flood risk listPO21 4JH: not on the flood risk listPO21 4JJ: not on the flood risk listPO21 4JL: not on the flood risk listPO21 4JP: not on the flood risk listPO21 4JQ: not on the flood risk listPO21 4JR: not on the flood risk listPO21 4JS: not on the flood risk listPO21 4JT: not on the flood risk listPO21 4JU: not on the flood risk listPO21 4JW: not on the flood risk listPO21 4JX: not on the flood risk listPO21 4JY: not on the flood risk listPO21 4JZ: not on the flood risk listPO21 4LA: not on the flood risk listPO21 4LB: not on the flood risk listPO21 4LD: not on the flood risk listPO21 4LE: not on the flood risk listPO21 4LF: not on the flood risk listPO21 4LG: not on the flood risk listPO21 4LH: not on the flood risk listPO21 4LJ: not on the flood risk listPO21 4LL: not on the flood risk listPO21 4LN: not on the flood risk listPO21 4LP: not on the flood risk listPO21 4LQ: not on the flood risk listPO21 4LR: not on the flood risk listPO21 4LS: not on the flood risk listPO21 4LT: not on the flood risk listPO21 4LU: not on the flood risk listPO21 4LW: not on the flood risk listPO21 4LX: not on the flood risk listPO21 4LY: not on the flood risk listPO21 4LZ: not on the flood risk listPO21 4NA: not on the flood risk listPO21 4NB: not on the flood risk listPO21 4ND: not on the flood risk listPO21 4NE: not on the flood risk listPO21 4NF: not on the flood risk listPO21 4NG: not on the flood risk listPO21 4NH: not on the flood risk listPO21 4NJ: not on the flood risk listPO21 4NL: not on the flood risk listPO21 4NN: not on the flood risk listPO21 4NQ: not on the flood risk listPO21 4NW: not on the flood risk listPO21 4NZ: not on the flood risk listPO21 4PD: not on the flood risk listPO21 4PE: not on the flood risk listPO21 4PF: not on the flood risk listPO21 4PG: not on the flood risk listPO21 4PH: not on the flood risk listPO21 4PJ: not on the flood risk listPO21 4PL: not on the flood risk listPO21 4PN: not on the flood risk listPO21 4PP: not on the flood risk listPO21 4PQ: not on the flood risk listPO21 4PR: not on the flood risk listPO21 4PS: not on the flood risk listPO21 4PU: not on the flood risk listPO21 4PW: not on the flood risk listPO21 4PY: not on the flood risk listPO21 4PZ: not on the flood risk listPO21 4QA: not on the flood risk listPO21 4QB: not on the flood risk listPO21 4QD: not on the flood risk listPO21 4QE: not on the flood risk listPO21 4QF: not on the flood risk listPO21 4QG: not on the flood risk listPO21 4QH: not on the flood risk listPO21 4QJ: not on the flood risk listPO21 4QL: not on the flood risk listPO21 4QN: not on the flood risk listPO21 4QP: not on the flood risk listPO21 4QQ: not on the flood risk listPO21 4QR: not on the flood risk listPO21 4QS: not on the flood risk listPO21 4QT: not on the flood risk listPO21 4QU: not on the flood risk listPO21 4QW: not on the flood risk listPO21 4QX: not on the flood risk listPO21 4RA: not on the flood risk listPO21 4RB: not on the flood risk listPO21 4RD: not on the flood risk listPO21 4RG: not on the flood risk listPO21 4RH: not on the flood risk listPO21 4RJ: not on the flood risk listPO21 4RL: not on the flood risk listPO21 4RN: not on the flood risk listPO21 4RP: not on the flood risk listPO21 4RQ: not on the flood risk listPO21 4RR: not on the flood risk listPO21 4RS: not on the flood risk listPO21 4RT: not on the flood risk listPO21 4RU: not on the flood risk listPO21 4RW: not on the flood risk listPO21 4RX: not on the flood risk listPO21 4RY: not on the flood risk listPO21 4RZ: not on the flood risk listPO21 4SA: not on the flood risk listPO21 4SB: not on the flood risk listPO21 4SD: not on the flood risk listPO21 4SE: not on the flood risk listPO21 4SF: not on the flood risk listPO21 4SH: not on the flood risk listPO21 4SL: not on the flood risk listPO21 4TE: not on the flood risk listPO21 4TG: not on the flood risk listPO21 4TL: not on the flood risk listPO21 4TN: not on the flood risk listPO21 4TP: not on the flood risk listPO21 4TR: not on the flood risk listPO21 4TW: not on the flood risk listPO21 4UA: not on the flood risk listPO21 4UB: not on the flood risk listPO21 4UD: not on the flood risk listPO21 4UE: not on the flood risk listPO21 4UF: not on the flood risk listPO21 4UH: not on the flood risk listPO21 4UJ: not on the flood risk listPO21 4UP: not on the flood risk listPO21 4UR: not on the flood risk listPO21 4UT: not on the flood risk listPO21 4UW: not on the flood risk listPO21 4XA: not on the flood risk listPO21 4XB: not on the flood risk listPO21 4XD: not on the flood risk listPO21 4XE: not on the flood risk listPO21 4XF: not on the flood risk listPO21 4XH: not on the flood risk listPO21 4XJ: not on the flood risk listPO21 4XL: not on the flood risk listPO21 4XN: not on the flood risk listPO21 4XP: not on the flood risk listPO21 4XQ: not on the flood risk listPO21 4XR: not on the flood risk listPO21 4XW: not on the flood risk listPO21 4AD: very low flood risk onlyPO21 4AW: very low flood risk onlyPO21 4NP: very low flood risk onlyPO21 4SP: very low flood risk onlyPO21 4SR: very low flood risk onlyPO21 4SS: very low flood risk onlyPO21 4SX: very low flood risk onlyPO21 4TA: very low flood risk onlyPO21 4TJ: very low flood risk onlyPO21 4TQ: very low flood risk onlyPO21 4TX: very low flood risk onlyPO21 4UL: very low flood risk onlyPO21 4UN: very low flood risk onlyPO21 4UX: very low flood risk onlyPO21 4XX: very low flood risk onlyPO21 4AA: low flood risk at worstPO21 4AH: low flood risk at worstPO21 4AN: low flood risk at worstPO21 4AS: low flood risk at worstPO21 4NR: low flood risk at worstPO21 4NS: low flood risk at worstPO21 4NT: low flood risk at worstPO21 4NU: low flood risk at worstPO21 4ST: low flood risk at worstPO21 4SU: low flood risk at worstPO21 4SY: low flood risk at worstPO21 4SZ: low flood risk at worstPO21 4TB: low flood risk at worstPO21 4TD: low flood risk at worstPO21 4TF: low flood risk at worstPO21 4TH: low flood risk at worstPO21 4UU: low flood risk at worstPO21 4AJ: high flood riskPO21 4AL: high flood risk PaghamAldwick West Map of every postcode in the PO21 4 sector, by flood risk Of the 270 postcodes in the PO21 4 sector that ONS places, 2 have a home or business at high risk, 18 are at low risk at worst, 15 are at very low risk only and 235 are not on the Environment Agency's at-risk list. 2 postcodes lie beyond the edge and are listed under the map. Places named: Pagham, Aldwick West. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. PaghamAldwick West
  • A home or business at high risk: 2
  • At medium risk at worst: 0
  • At low risk at worst: 18
  • At very low risk only: 15
  • Not on the at-risk list: 235

Of the 270 postcodes in the PO21 4 sector that ONS places, 2 have a home or business at high risk, 18 are at low risk at worst, 15 are at very low risk only and 235 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.

PO21 4AL8 at high riskPO21 4AJ2 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.

PO21 4NXPO21 4WA

What do homes sell for in PO21 4?

Homes in PO21 4 sold for a typical £357,000 in the 12 months to August 2026, across 116 sales, down 6.1% on the 12 months before, HM Land Registry's figures show.

£357,000 typical price, the 12 months to August 2026
£380,000 12 months to August 2025
▼ down 6.1% on the 12 months before
  • Detached £570,000 57 sales
  • Semi-detached £330,000 33 sales
  • Terraced £282,500 16 sales
  • Flat or maisonette £188,750 10 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 PO21 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 PO21 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.

PO21 4AAPO21 4ABPO21 4ADPO21 4AEPO21 4AFPO21 4AGPO21 4AHPO21 4AJPO21 4ALPO21 4ANPO21 4APPO21 4AQPO21 4ARPO21 4ASPO21 4ATPO21 4AUPO21 4AWPO21 4AXPO21 4AYPO21 4AZPO21 4BAPO21 4BBPO21 4BDPO21 4BEPO21 4BFPO21 4BGPO21 4BHPO21 4BJPO21 4BLPO21 4BNPO21 4BPPO21 4BQPO21 4BTPO21 4BUPO21 4BWPO21 4BXPO21 4BYPO21 4BZPO21 4DAPO21 4DBPO21 4DDPO21 4DEPO21 4DFPO21 4DGPO21 4DHPO21 4DJPO21 4DLPO21 4DNPO21 4DPPO21 4DQPO21 4DRPO21 4DSPO21 4DTPO21 4DUPO21 4DWPO21 4DXPO21 4DYPO21 4DZPO21 4EAPO21 4EBPO21 4EDPO21 4EEPO21 4EFPO21 4EGPO21 4EHPO21 4EJPO21 4ELPO21 4ENPO21 4EPPO21 4EQPO21 4ERPO21 4ESPO21 4ETPO21 4EUPO21 4EWPO21 4EXPO21 4EYPO21 4EZPO21 4FBPO21 4FDPO21 4FEPO21 4FHPO21 4HAPO21 4HBPO21 4HDPO21 4HEPO21 4HFPO21 4HGPO21 4HHPO21 4HJPO21 4HLPO21 4HNPO21 4HPPO21 4HQPO21 4HRPO21 4HSPO21 4HTPO21 4HUPO21 4HWPO21 4HXPO21 4JAPO21 4JBPO21 4JDPO21 4JEPO21 4JFPO21 4JGPO21 4JHPO21 4JJPO21 4JLPO21 4JPPO21 4JQPO21 4JRPO21 4JSPO21 4JTPO21 4JUPO21 4JWPO21 4JXPO21 4JYPO21 4JZPO21 4LAPO21 4LBPO21 4LDPO21 4LEPO21 4LFPO21 4LGPO21 4LHPO21 4LJPO21 4LLPO21 4LNPO21 4LPPO21 4LQPO21 4LRPO21 4LSPO21 4LTPO21 4LUPO21 4LWPO21 4LXPO21 4LYPO21 4LZPO21 4NAPO21 4NBPO21 4NDPO21 4NEPO21 4NFPO21 4NGPO21 4NHPO21 4NJPO21 4NLPO21 4NNPO21 4NPPO21 4NQPO21 4NRPO21 4NSPO21 4NTPO21 4NUPO21 4NWPO21 4NXPO21 4NZPO21 4PDPO21 4PEPO21 4PFPO21 4PGPO21 4PHPO21 4PJPO21 4PLPO21 4PNPO21 4PPPO21 4PQPO21 4PRPO21 4PSPO21 4PUPO21 4PWPO21 4PYPO21 4PZPO21 4QAPO21 4QBPO21 4QDPO21 4QEPO21 4QFPO21 4QGPO21 4QHPO21 4QJPO21 4QLPO21 4QNPO21 4QPPO21 4QQPO21 4QRPO21 4QSPO21 4QTPO21 4QUPO21 4QWPO21 4QXPO21 4RAPO21 4RBPO21 4RDPO21 4RGPO21 4RHPO21 4RJPO21 4RLPO21 4RNPO21 4RPPO21 4RQPO21 4RRPO21 4RSPO21 4RTPO21 4RUPO21 4RWPO21 4RXPO21 4RYPO21 4RZPO21 4SAPO21 4SBPO21 4SDPO21 4SEPO21 4SFPO21 4SHPO21 4SLPO21 4SPPO21 4SRPO21 4SSPO21 4STPO21 4SUPO21 4SXPO21 4SYPO21 4SZPO21 4TAPO21 4TBPO21 4TDPO21 4TEPO21 4TFPO21 4TGPO21 4THPO21 4TJPO21 4TLPO21 4TNPO21 4TPPO21 4TQPO21 4TRPO21 4TWPO21 4TXPO21 4UAPO21 4UBPO21 4UDPO21 4UEPO21 4UFPO21 4UHPO21 4UJPO21 4ULPO21 4UNPO21 4UPPO21 4URPO21 4UTPO21 4UUPO21 4UWPO21 4UXPO21 4WAPO21 4XAPO21 4XBPO21 4XDPO21 4XEPO21 4XFPO21 4XHPO21 4XJPO21 4XLPO21 4XNPO21 4XPPO21 4XQPO21 4XRPO21 4XWPO21 4XX

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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