CB21 4 postcode sector in the CB21 district

CB21 4 is a sector of the CB21 district: every postcode that starts CB21 4. It has 240 postcodes in use, 5 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 CB21 4 sector, by flood risk

Map of every postcode in the CB21 4 sector, by flood risk Of the 240 postcodes in the CB21 4 sector that ONS places, 8 have a home or business at high risk, 4 are at medium risk at worst, 5 are at low risk at worst and 223 are not on the Environment Agency's at-risk list. Places named: Linton. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A1017A11 CB21 4AA: not on the flood risk listCB21 4AB: not on the flood risk listCB21 4AD: not on the flood risk listCB21 4AE: not on the flood risk listCB21 4AF: not on the flood risk listCB21 4AG: not on the flood risk listCB21 4AL: not on the flood risk listCB21 4AN: not on the flood risk listCB21 4AR: not on the flood risk listCB21 4AS: not on the flood risk listCB21 4AT: not on the flood risk listCB21 4AU: not on the flood risk listCB21 4AW: not on the flood risk listCB21 4AX: not on the flood risk listCB21 4AY: not on the flood risk listCB21 4AZ: not on the flood risk listCB21 4BA: not on the flood risk listCB21 4BB: not on the flood risk listCB21 4BE: not on the flood risk listCB21 4BF: not on the flood risk listCB21 4BG: not on the flood risk listCB21 4DG: not on the flood risk listCB21 4DJ: not on the flood risk listCB21 4DP: not on the flood risk listCB21 4DS: not on the flood risk listCB21 4DT: not on the flood risk listCB21 4DU: not on the flood risk listCB21 4DX: not on the flood risk listCB21 4DY: not on the flood risk listCB21 4DZ: not on the flood risk listCB21 4EA: not on the flood risk listCB21 4EB: not on the flood risk listCB21 4ED: not on the flood risk listCB21 4EE: not on the flood risk listCB21 4EF: not on the flood risk listCB21 4EH: not on the flood risk listCB21 4EL: not on the flood risk listCB21 4EN: not on the flood risk listCB21 4EP: not on the flood risk listCB21 4EQ: not on the flood risk listCB21 4ER: not on the flood risk listCB21 4ES: not on the flood risk listCB21 4EU: not on the flood risk listCB21 4EW: not on the flood risk listCB21 4EZ: not on the flood risk listCB21 4FD: not on the flood risk listCB21 4HA: not on the flood risk listCB21 4HB: not on the flood risk listCB21 4HD: not on the flood risk listCB21 4HF: not on the flood risk listCB21 4HH: not on the flood risk listCB21 4HL: not on the flood risk listCB21 4HQ: not on the flood risk listCB21 4HU: not on the flood risk listCB21 4HY: not on the flood risk listCB21 4JA: not on the flood risk listCB21 4JB: not on the flood risk listCB21 4JE: not on the flood risk listCB21 4JF: not on the flood risk listCB21 4JG: not on the flood risk listCB21 4JH: not on the flood risk listCB21 4JJ: not on the flood risk listCB21 4JL: not on the flood risk listCB21 4JP: not on the flood risk listCB21 4JQ: not on the flood risk listCB21 4JR: not on the flood risk listCB21 4JT: not on the flood risk listCB21 4JW: not on the flood risk listCB21 4LA: not on the flood risk listCB21 4LB: not on the flood risk listCB21 4LD: not on the flood risk listCB21 4LE: not on the flood risk listCB21 4LF: not on the flood risk listCB21 4LG: not on the flood risk listCB21 4LH: not on the flood risk listCB21 4LJ: not on the flood risk listCB21 4LL: not on the flood risk listCB21 4LN: not on the flood risk listCB21 4LQ: not on the flood risk listCB21 4LR: not on the flood risk listCB21 4LS: not on the flood risk listCB21 4LU: not on the flood risk listCB21 4LW: not on the flood risk listCB21 4LX: not on the flood risk listCB21 4LY: not on the flood risk listCB21 4LZ: not on the flood risk listCB21 4NA: not on the flood risk listCB21 4NB: not on the flood risk listCB21 4NF: not on the flood risk listCB21 4NH: not on the flood risk listCB21 4NJ: not on the flood risk listCB21 4NL: not on the flood risk listCB21 4NP: not on the flood risk listCB21 4NS: not on the flood risk listCB21 4NW: not on the flood risk listCB21 4NX: not on the flood risk listCB21 4NY: not on the flood risk listCB21 4PA: not on the flood risk listCB21 4PD: not on the flood risk listCB21 4PE: not on the flood risk listCB21 4PG: not on the flood risk listCB21 4PH: not on the flood risk listCB21 4PN: not on the flood risk listCB21 4PQ: not on the flood risk listCB21 4PR: not on the flood risk listCB21 4PS: not on the flood risk listCB21 4PY: not on the flood risk listCB21 4QA: not on the flood risk listCB21 4QB: not on the flood risk listCB21 4QD: not on the flood risk listCB21 4QE: not on the flood risk listCB21 4QF: not on the flood risk listCB21 4QG: not on the flood risk listCB21 4QH: not on the flood risk listCB21 4QN: not on the flood risk listCB21 4QP: not on the flood risk listCB21 4QQ: not on the flood risk listCB21 4QR: not on the flood risk listCB21 4QS: not on the flood risk listCB21 4QX: not on the flood risk listCB21 4QY: not on the flood risk listCB21 4QZ: not on the flood risk listCB21 4RA: not on the flood risk listCB21 4RD: not on the flood risk listCB21 4RE: not on the flood risk listCB21 4RF: not on the flood risk listCB21 4RJ: not on the flood risk listCB21 4RN: not on the flood risk listCB21 4RP: not on the flood risk listCB21 4RQ: not on the flood risk listCB21 4RS: not on the flood risk listCB21 4RT: not on the flood risk listCB21 4RW: not on the flood risk listCB21 4RX: not on the flood risk listCB21 4RY: not on the flood risk listCB21 4RZ: not on the flood risk listCB21 4SA: not on the flood risk listCB21 4SB: not on the flood risk listCB21 4SD: not on the flood risk listCB21 4SF: not on the flood risk listCB21 4SH: not on the flood risk listCB21 4SR: not on the flood risk listCB21 4ST: not on the flood risk listCB21 4SX: not on the flood risk listCB21 4SZ: not on the flood risk listCB21 4TA: not on the flood risk listCB21 4TB: not on the flood risk listCB21 4TD: not on the flood risk listCB21 4TE: not on the flood risk listCB21 4TF: not on the flood risk listCB21 4TG: not on the flood risk listCB21 4TH: not on the flood risk listCB21 4TJ: not on the flood risk listCB21 4TL: not on the flood risk listCB21 4TN: not on the flood risk listCB21 4TR: not on the flood risk listCB21 4TT: not on the flood risk listCB21 4TW: not on the flood risk listCB21 4UA: not on the flood risk listCB21 4UB: not on the flood risk listCB21 4UD: not on the flood risk listCB21 4UF: not on the flood risk listCB21 4UJ: not on the flood risk listCB21 4UX: not on the flood risk listCB21 4XA: not on the flood risk listCB21 4XB: not on the flood risk listCB21 4XD: not on the flood risk listCB21 4XF: not on the flood risk listCB21 4XH: not on the flood risk listCB21 4XN: not on the flood risk listCB21 4XQ: not on the flood risk listCB21 4YL: not on the flood risk listCB21 4YP: not on the flood risk listCB21 4YS: not on the flood risk listCB21 4YT: not on the flood risk listCB21 4JD: low flood risk at worstCB21 4JX: low flood risk at worstCB21 4PP: low flood risk at worstCB21 4RG: low flood risk at worstCB21 4HS: medium flood risk at worstCB21 4HX: medium flood risk at worstCB21 4JY: medium flood risk at worstCB21 4RH: medium flood risk at worstCB21 4HE: high flood riskCB21 4NR: high flood riskCB21 4NT: high flood riskCB21 4NU: high flood riskCB21 4PT: high flood riskCB21 4PW: high flood riskCB21 4RR: high flood riskCB21 4TP: high flood risk Linton Map of every postcode in the CB21 4 sector, by flood risk Of the 240 postcodes in the CB21 4 sector that ONS places, 8 have a home or business at high risk, 4 are at medium risk at worst, 5 are at low risk at worst and 223 are not on the Environment Agency's at-risk list. Places named: Linton. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. Linton
  • A home or business at high risk: 8
  • At medium risk at worst: 4
  • At low risk at worst: 5
  • At very low risk only: 0
  • Not on the at-risk list: 223

Of the 240 postcodes in the CB21 4 sector that ONS places, 8 have a home or business at high risk, 4 are at medium risk at worst, 5 are at low risk at worst and 223 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 high risk

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

CB21 4PW5 at high riskCB21 4RR5 at high riskCB21 4NR4 at high riskCB21 4HE3 at high riskCB21 4NT2 at high riskCB21 4TP1 at high riskCB21 4NU1 at high riskCB21 4PT1 at high risk

What do homes sell for in CB21 4?

Homes in CB21 4 sold for a typical £422,500 in the 12 months to August 2026, across 98 sales, up 0.8% on the 12 months before, HM Land Registry's figures show.

£422,500 typical price, the 12 months to August 2026
£419,000 12 months to August 2025
▲ up 0.8% on the 12 months before
  • Detached £560,000 45 sales
  • Semi-detached £400,000 35 sales
  • Terraced £350,000 16 sales
  • Flat or maisonette 2 sales, 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 CB21 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 CB21 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.

CB21 4AACB21 4ABCB21 4ADCB21 4AECB21 4AFCB21 4AGCB21 4AHCB21 4ALCB21 4ANCB21 4APCB21 4AQCB21 4ARCB21 4ASCB21 4ATCB21 4AUCB21 4AWCB21 4AXCB21 4AYCB21 4AZCB21 4BACB21 4BBCB21 4BECB21 4BFCB21 4BGCB21 4DGCB21 4DJCB21 4DPCB21 4DSCB21 4DTCB21 4DUCB21 4DWCB21 4DXCB21 4DYCB21 4DZCB21 4EACB21 4EBCB21 4EDCB21 4EECB21 4EFCB21 4EGCB21 4EHCB21 4EJCB21 4ELCB21 4ENCB21 4EPCB21 4EQCB21 4ERCB21 4ESCB21 4EUCB21 4EWCB21 4EZCB21 4FDCB21 4HACB21 4HBCB21 4HDCB21 4HECB21 4HFCB21 4HGCB21 4HHCB21 4HJCB21 4HLCB21 4HQCB21 4HSCB21 4HTCB21 4HUCB21 4HXCB21 4HYCB21 4JACB21 4JBCB21 4JDCB21 4JECB21 4JFCB21 4JGCB21 4JHCB21 4JJCB21 4JLCB21 4JNCB21 4JPCB21 4JQCB21 4JRCB21 4JSCB21 4JTCB21 4JWCB21 4JXCB21 4JYCB21 4JZCB21 4LACB21 4LBCB21 4LDCB21 4LECB21 4LFCB21 4LGCB21 4LHCB21 4LJCB21 4LLCB21 4LNCB21 4LPCB21 4LQCB21 4LRCB21 4LSCB21 4LTCB21 4LUCB21 4LWCB21 4LXCB21 4LYCB21 4LZCB21 4NACB21 4NBCB21 4NDCB21 4NECB21 4NFCB21 4NGCB21 4NHCB21 4NJCB21 4NLCB21 4NNCB21 4NPCB21 4NQCB21 4NRCB21 4NSCB21 4NTCB21 4NUCB21 4NWCB21 4NXCB21 4NYCB21 4NZCB21 4PACB21 4PBCB21 4PDCB21 4PECB21 4PFCB21 4PGCB21 4PHCB21 4PLCB21 4PNCB21 4PPCB21 4PQCB21 4PRCB21 4PSCB21 4PTCB21 4PWCB21 4PYCB21 4QACB21 4QBCB21 4QDCB21 4QECB21 4QFCB21 4QGCB21 4QHCB21 4QNCB21 4QPCB21 4QQCB21 4QRCB21 4QSCB21 4QTCB21 4QUCB21 4QXCB21 4QYCB21 4QZCB21 4RACB21 4RBCB21 4RDCB21 4RECB21 4RFCB21 4RGCB21 4RHCB21 4RJCB21 4RNCB21 4RPCB21 4RQCB21 4RRCB21 4RSCB21 4RTCB21 4RUCB21 4RWCB21 4RXCB21 4RYCB21 4RZCB21 4SACB21 4SBCB21 4SDCB21 4SFCB21 4SHCB21 4SJCB21 4SNCB21 4SPCB21 4SRCB21 4SSCB21 4STCB21 4SUCB21 4SWCB21 4SXCB21 4SYCB21 4SZCB21 4TACB21 4TBCB21 4TDCB21 4TECB21 4TFCB21 4TGCB21 4THCB21 4TJCB21 4TLCB21 4TNCB21 4TPCB21 4TQCB21 4TRCB21 4TTCB21 4TWCB21 4UACB21 4UBCB21 4UDCB21 4UECB21 4UFCB21 4UGCB21 4UHCB21 4UJCB21 4UQCB21 4URCB21 4UWCB21 4UXCB21 4UYCB21 4XACB21 4XBCB21 4XDCB21 4XECB21 4XFCB21 4XGCB21 4XHCB21 4XJCB21 4XNCB21 4XQCB21 4XXCB21 4YLCB21 4YNCB21 4YPCB21 4YRCB21 4YSCB21 4YTCB21 4YW

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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