CB1 3 postcode sector in the CB1 district

CB1 3 is a sector of the CB1 district: every postcode that starts CB1 3. It has 291 postcodes in use, 7 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 CB1 3 sector, by flood risk

Map of every postcode in the CB1 3 sector, by flood risk Of the 291 postcodes in the CB1 3 sector that ONS places, 4 have a home or business at high risk, 6 are at low risk at worst and 281 are not on the Environment Agency's at-risk list. Places named: Romsey, Coleridge. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A1134 CB1 3AA: not on the flood risk listCB1 3AB: not on the flood risk listCB1 3AD: not on the flood risk listCB1 3AE: not on the flood risk listCB1 3AF: not on the flood risk listCB1 3AG: not on the flood risk listCB1 3AH: not on the flood risk listCB1 3AJ: not on the flood risk listCB1 3AL: not on the flood risk listCB1 3AN: not on the flood risk listCB1 3AP: not on the flood risk listCB1 3AQ: not on the flood risk listCB1 3AR: not on the flood risk listCB1 3AS: not on the flood risk listCB1 3AT: not on the flood risk listCB1 3AU: not on the flood risk listCB1 3AW: not on the flood risk listCB1 3AX: not on the flood risk listCB1 3AY: not on the flood risk listCB1 3AZ: not on the flood risk listCB1 3BA: not on the flood risk listCB1 3BB: not on the flood risk listCB1 3BD: not on the flood risk listCB1 3BE: not on the flood risk listCB1 3BH: not on the flood risk listCB1 3BJ: not on the flood risk listCB1 3BL: not on the flood risk listCB1 3BN: not on the flood risk listCB1 3BP: not on the flood risk listCB1 3BQ: not on the flood risk listCB1 3BS: not on the flood risk listCB1 3BT: not on the flood risk listCB1 3BU: not on the flood risk listCB1 3BW: not on the flood risk listCB1 3BX: not on the flood risk listCB1 3BY: not on the flood risk listCB1 3BZ: not on the flood risk listCB1 3DA: not on the flood risk listCB1 3DB: not on the flood risk listCB1 3DD: not on the flood risk listCB1 3DE: not on the flood risk listCB1 3DF: not on the flood risk listCB1 3DG: not on the flood risk listCB1 3DH: not on the flood risk listCB1 3DJ: not on the flood risk listCB1 3DL: not on the flood risk listCB1 3DN: not on the flood risk listCB1 3DP: not on the flood risk listCB1 3DQ: not on the flood risk listCB1 3DR: not on the flood risk listCB1 3DS: not on the flood risk listCB1 3DT: not on the flood risk listCB1 3DU: not on the flood risk listCB1 3DW: not on the flood risk listCB1 3DY: not on the flood risk listCB1 3DZ: not on the flood risk listCB1 3EA: not on the flood risk listCB1 3EB: not on the flood risk listCB1 3EE: not on the flood risk listCB1 3EF: not on the flood risk listCB1 3EG: not on the flood risk listCB1 3EJ: not on the flood risk listCB1 3EL: not on the flood risk listCB1 3EN: not on the flood risk listCB1 3EP: not on the flood risk listCB1 3EQ: not on the flood risk listCB1 3ER: not on the flood risk listCB1 3ES: not on the flood risk listCB1 3ET: not on the flood risk listCB1 3EX: not on the flood risk listCB1 3EY: not on the flood risk listCB1 3EZ: not on the flood risk listCB1 3FA: not on the flood risk listCB1 3FB: not on the flood risk listCB1 3FD: not on the flood risk listCB1 3FE: not on the flood risk listCB1 3FF: not on the flood risk listCB1 3FG: not on the flood risk listCB1 3FH: not on the flood risk listCB1 3FJ: not on the flood risk listCB1 3FL: not on the flood risk listCB1 3FN: not on the flood risk listCB1 3FP: not on the flood risk listCB1 3FQ: not on the flood risk listCB1 3FR: not on the flood risk listCB1 3FS: not on the flood risk listCB1 3FT: not on the flood risk listCB1 3FU: not on the flood risk listCB1 3FW: not on the flood risk listCB1 3FZ: not on the flood risk listCB1 3GA: not on the flood risk listCB1 3GB: not on the flood risk listCB1 3GL: not on the flood risk listCB1 3GN: not on the flood risk listCB1 3GQ: not on the flood risk listCB1 3HA: not on the flood risk listCB1 3HB: not on the flood risk listCB1 3HD: not on the flood risk listCB1 3HE: not on the flood risk listCB1 3HG: not on the flood risk listCB1 3HH: not on the flood risk listCB1 3HJ: not on the flood risk listCB1 3HL: not on the flood risk listCB1 3HN: not on the flood risk listCB1 3HQ: not on the flood risk listCB1 3HS: not on the flood risk listCB1 3HT: not on the flood risk listCB1 3HU: not on the flood risk listCB1 3HW: not on the flood risk listCB1 3HX: not on the flood risk listCB1 3HZ: not on the flood risk listCB1 3JA: not on the flood risk listCB1 3JB: not on the flood risk listCB1 3JD: not on the flood risk listCB1 3JE: not on the flood risk listCB1 3JF: not on the flood risk listCB1 3JG: not on the flood risk listCB1 3JH: not on the flood risk listCB1 3JJ: not on the flood risk listCB1 3JL: not on the flood risk listCB1 3JN: not on the flood risk listCB1 3JP: not on the flood risk listCB1 3JR: not on the flood risk listCB1 3JS: not on the flood risk listCB1 3JT: not on the flood risk listCB1 3JW: not on the flood risk listCB1 3JX: not on the flood risk listCB1 3JY: not on the flood risk listCB1 3JZ: not on the flood risk listCB1 3LA: not on the flood risk listCB1 3LB: not on the flood risk listCB1 3LE: not on the flood risk listCB1 3LF: not on the flood risk listCB1 3LG: not on the flood risk listCB1 3LH: not on the flood risk listCB1 3LJ: not on the flood risk listCB1 3LL: not on the flood risk listCB1 3LN: not on the flood risk listCB1 3LP: not on the flood risk listCB1 3LQ: not on the flood risk listCB1 3LR: not on the flood risk listCB1 3LS: not on the flood risk listCB1 3LT: not on the flood risk listCB1 3LU: not on the flood risk listCB1 3LW: not on the flood risk listCB1 3LY: not on the flood risk listCB1 3LZ: not on the flood risk listCB1 3NA: not on the flood risk listCB1 3NB: not on the flood risk listCB1 3ND: not on the flood risk listCB1 3NF: not on the flood risk listCB1 3NG: not on the flood risk listCB1 3NH: not on the flood risk listCB1 3NL: not on the flood risk listCB1 3NN: not on the flood risk listCB1 3NP: not on the flood risk listCB1 3NQ: not on the flood risk listCB1 3NR: not on the flood risk listCB1 3NT: not on the flood risk listCB1 3NU: not on the flood risk listCB1 3PB: not on the flood risk listCB1 3PE: not on the flood risk listCB1 3PF: not on the flood risk listCB1 3PG: not on the flood risk listCB1 3PH: not on the flood risk listCB1 3PJ: not on the flood risk listCB1 3PL: not on the flood risk listCB1 3PN: not on the flood risk listCB1 3PQ: not on the flood risk listCB1 3PR: not on the flood risk listCB1 3PS: not on the flood risk listCB1 3PT: not on the flood risk listCB1 3PU: not on the flood risk listCB1 3PW: not on the flood risk listCB1 3PX: not on the flood risk listCB1 3PY: not on the flood risk listCB1 3PZ: not on the flood risk listCB1 3QA: not on the flood risk listCB1 3QB: not on the flood risk listCB1 3QD: not on the flood risk listCB1 3QE: not on the flood risk listCB1 3QF: not on the flood risk listCB1 3QG: not on the flood risk listCB1 3QJ: not on the flood risk listCB1 3QL: not on the flood risk listCB1 3QN: not on the flood risk listCB1 3QP: not on the flood risk listCB1 3QQ: not on the flood risk listCB1 3QR: not on the flood risk listCB1 3QT: not on the flood risk listCB1 3QU: not on the flood risk listCB1 3QW: not on the flood risk listCB1 3QX: not on the flood risk listCB1 3QY: not on the flood risk listCB1 3QZ: not on the flood risk listCB1 3RA: not on the flood risk listCB1 3RB: not on the flood risk listCB1 3RD: not on the flood risk listCB1 3RE: not on the flood risk listCB1 3RF: not on the flood risk listCB1 3RG: not on the flood risk listCB1 3RH: not on the flood risk listCB1 3RJ: not on the flood risk listCB1 3RL: not on the flood risk listCB1 3RN: not on the flood risk listCB1 3RP: not on the flood risk listCB1 3RQ: not on the flood risk listCB1 3RR: not on the flood risk listCB1 3RS: not on the flood risk listCB1 3RT: not on the flood risk listCB1 3RU: not on the flood risk listCB1 3RW: not on the flood risk listCB1 3RX: not on the flood risk listCB1 3RY: not on the flood risk listCB1 3RZ: not on the flood risk listCB1 3SA: not on the flood risk listCB1 3SB: not on the flood risk listCB1 3SD: not on the flood risk listCB1 3SE: not on the flood risk listCB1 3SF: not on the flood risk listCB1 3SG: not on the flood risk listCB1 3SH: not on the flood risk listCB1 3SJ: not on the flood risk listCB1 3SL: not on the flood risk listCB1 3SN: not on the flood risk listCB1 3SP: not on the flood risk listCB1 3SQ: not on the flood risk listCB1 3SR: not on the flood risk listCB1 3SS: not on the flood risk listCB1 3ST: not on the flood risk listCB1 3SU: not on the flood risk listCB1 3SW: not on the flood risk listCB1 3SX: not on the flood risk listCB1 3SY: not on the flood risk listCB1 3SZ: not on the flood risk listCB1 3TA: not on the flood risk listCB1 3TB: not on the flood risk listCB1 3TD: not on the flood risk listCB1 3TE: not on the flood risk listCB1 3TF: not on the flood risk listCB1 3TG: not on the flood risk listCB1 3TH: not on the flood risk listCB1 3TJ: not on the flood risk listCB1 3TL: not on the flood risk listCB1 3TN: not on the flood risk listCB1 3TP: not on the flood risk listCB1 3TQ: not on the flood risk listCB1 3TR: not on the flood risk listCB1 3TS: not on the flood risk listCB1 3TT: not on the flood risk listCB1 3TU: not on the flood risk listCB1 3TW: not on the flood risk listCB1 3TX: not on the flood risk listCB1 3TY: not on the flood risk listCB1 3TZ: not on the flood risk listCB1 3UA: not on the flood risk listCB1 3UB: not on the flood risk listCB1 3UD: not on the flood risk listCB1 3UE: not on the flood risk listCB1 3UF: not on the flood risk listCB1 3UG: not on the flood risk listCB1 3UH: not on the flood risk listCB1 3UJ: not on the flood risk listCB1 3UL: not on the flood risk listCB1 3UN: not on the flood risk listCB1 3UR: not on the flood risk listCB1 3US: not on the flood risk listCB1 3UU: not on the flood risk listCB1 3UX: not on the flood risk listCB1 3UY: not on the flood risk listCB1 3UZ: not on the flood risk listCB1 3WL: not on the flood risk listCB1 3WX: not on the flood risk listCB1 3XD: not on the flood risk listCB1 3XR: not on the flood risk listCB1 3XW: not on the flood risk listCB1 3YH: not on the flood risk listCB1 3EW: low flood risk at worstCB1 3HR: low flood risk at worstCB1 3HY: low flood risk at worstCB1 3NS: low flood risk at worstCB1 3NW: low flood risk at worstCB1 3NX: low flood risk at worstCB1 3HP: high flood riskCB1 3NY: high flood riskCB1 3NZ: high flood riskCB1 3PA: high flood risk RomseyColeridge Map of every postcode in the CB1 3 sector, by flood risk Of the 291 postcodes in the CB1 3 sector that ONS places, 4 have a home or business at high risk, 6 are at low risk at worst and 281 are not on the Environment Agency's at-risk list. Places named: Romsey, Coleridge. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. RomseyColeridge
  • A home or business at high risk: 4
  • At medium risk at worst: 0
  • At low risk at worst: 6
  • At very low risk only: 0
  • Not on the at-risk list: 281

Of the 291 postcodes in the CB1 3 sector that ONS places, 4 have a home or business at high risk, 6 are at low risk at worst and 281 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.

CB1 3NZ21 at high riskCB1 3NY6 at high riskCB1 3PA5 at high riskCB1 3HP1 at high risk

What do homes sell for in CB1 3?

Homes in CB1 3 sold for a typical £475,000 in the 12 months to August 2026, across 176 sales, down 5% on the 12 months before, HM Land Registry's figures show.

£475,000 typical price, the 12 months to August 2026
£500,000 12 months to August 2025
▼ down 5% on the 12 months before
  • Detached £712,500 8 sales
  • Semi-detached £590,000 37 sales
  • Terraced £485,000 91 sales
  • Flat or maisonette £280,000 40 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 CB1 3. 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 CB1 3

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.

CB1 3AACB1 3ABCB1 3ADCB1 3AECB1 3AFCB1 3AGCB1 3AHCB1 3AJCB1 3ALCB1 3ANCB1 3APCB1 3AQCB1 3ARCB1 3ASCB1 3ATCB1 3AUCB1 3AWCB1 3AXCB1 3AYCB1 3AZCB1 3BACB1 3BBCB1 3BDCB1 3BECB1 3BHCB1 3BJCB1 3BLCB1 3BNCB1 3BPCB1 3BQCB1 3BSCB1 3BTCB1 3BUCB1 3BWCB1 3BXCB1 3BYCB1 3BZCB1 3DACB1 3DBCB1 3DDCB1 3DECB1 3DFCB1 3DGCB1 3DHCB1 3DJCB1 3DLCB1 3DNCB1 3DPCB1 3DQCB1 3DRCB1 3DSCB1 3DTCB1 3DUCB1 3DWCB1 3DYCB1 3DZCB1 3EACB1 3EBCB1 3EECB1 3EFCB1 3EGCB1 3EJCB1 3ELCB1 3ENCB1 3EPCB1 3EQCB1 3ERCB1 3ESCB1 3ETCB1 3EWCB1 3EXCB1 3EYCB1 3EZCB1 3FACB1 3FBCB1 3FDCB1 3FECB1 3FFCB1 3FGCB1 3FHCB1 3FJCB1 3FLCB1 3FNCB1 3FPCB1 3FQCB1 3FRCB1 3FSCB1 3FTCB1 3FUCB1 3FWCB1 3FZCB1 3GACB1 3GBCB1 3GLCB1 3GNCB1 3GQCB1 3HACB1 3HBCB1 3HDCB1 3HECB1 3HGCB1 3HHCB1 3HJCB1 3HLCB1 3HNCB1 3HPCB1 3HQCB1 3HRCB1 3HSCB1 3HTCB1 3HUCB1 3HWCB1 3HXCB1 3HYCB1 3HZCB1 3JACB1 3JBCB1 3JDCB1 3JECB1 3JFCB1 3JGCB1 3JHCB1 3JJCB1 3JLCB1 3JNCB1 3JPCB1 3JQCB1 3JRCB1 3JSCB1 3JTCB1 3JWCB1 3JXCB1 3JYCB1 3JZCB1 3LACB1 3LBCB1 3LECB1 3LFCB1 3LGCB1 3LHCB1 3LJCB1 3LLCB1 3LNCB1 3LPCB1 3LQCB1 3LRCB1 3LSCB1 3LTCB1 3LUCB1 3LWCB1 3LXCB1 3LYCB1 3LZCB1 3NACB1 3NBCB1 3NDCB1 3NECB1 3NFCB1 3NGCB1 3NHCB1 3NLCB1 3NNCB1 3NPCB1 3NQCB1 3NRCB1 3NSCB1 3NTCB1 3NUCB1 3NWCB1 3NXCB1 3NYCB1 3NZCB1 3PACB1 3PBCB1 3PECB1 3PFCB1 3PGCB1 3PHCB1 3PJCB1 3PLCB1 3PNCB1 3PQCB1 3PRCB1 3PSCB1 3PTCB1 3PUCB1 3PWCB1 3PXCB1 3PYCB1 3PZCB1 3QACB1 3QBCB1 3QDCB1 3QECB1 3QFCB1 3QGCB1 3QJCB1 3QLCB1 3QNCB1 3QPCB1 3QQCB1 3QRCB1 3QTCB1 3QUCB1 3QWCB1 3QXCB1 3QYCB1 3QZCB1 3RACB1 3RBCB1 3RDCB1 3RECB1 3RFCB1 3RGCB1 3RHCB1 3RJCB1 3RLCB1 3RNCB1 3RPCB1 3RQCB1 3RRCB1 3RSCB1 3RTCB1 3RUCB1 3RWCB1 3RXCB1 3RYCB1 3RZCB1 3SACB1 3SBCB1 3SDCB1 3SECB1 3SFCB1 3SGCB1 3SHCB1 3SJCB1 3SLCB1 3SNCB1 3SPCB1 3SQCB1 3SRCB1 3SSCB1 3STCB1 3SUCB1 3SWCB1 3SXCB1 3SYCB1 3SZCB1 3TACB1 3TBCB1 3TDCB1 3TECB1 3TFCB1 3TGCB1 3THCB1 3TJCB1 3TLCB1 3TNCB1 3TPCB1 3TQCB1 3TRCB1 3TSCB1 3TTCB1 3TUCB1 3TWCB1 3TXCB1 3TYCB1 3TZCB1 3UACB1 3UBCB1 3UDCB1 3UECB1 3UFCB1 3UGCB1 3UHCB1 3UJCB1 3ULCB1 3UNCB1 3URCB1 3USCB1 3UUCB1 3UXCB1 3UYCB1 3UZCB1 3WLCB1 3WXCB1 3XBCB1 3XDCB1 3XRCB1 3XWCB1 3YH

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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