CB21 5 postcode sector in the CB21 district

CB21 5 is a sector of the CB21 district: every postcode that starts CB21 5. It has 149 postcodes in use, 4 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 5 sector, by flood risk

Map of every postcode in the CB21 5 sector, by flood risk Of the 149 postcodes in the CB21 5 sector that ONS places, 2 have a home or business at high risk, 1 are at medium risk at worst, 1 are at low risk at worst and 145 are not on the Environment Agency's at-risk list. Places named: Cambridge, Great Shelford and Stapleford, Fulbourn. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A1301A1307A11A1304 CB21 5AA: not on the flood risk listCB21 5AB: not on the flood risk listCB21 5AD: not on the flood risk listCB21 5AE: not on the flood risk listCB21 5AF: not on the flood risk listCB21 5AG: not on the flood risk listCB21 5AJ: not on the flood risk listCB21 5AL: not on the flood risk listCB21 5AN: not on the flood risk listCB21 5AP: not on the flood risk listCB21 5AQ: not on the flood risk listCB21 5AY: not on the flood risk listCB21 5AZ: not on the flood risk listCB21 5BA: not on the flood risk listCB21 5BB: not on the flood risk listCB21 5BF: not on the flood risk listCB21 5BG: not on the flood risk listCB21 5BH: not on the flood risk listCB21 5BL: not on the flood risk listCB21 5BS: not on the flood risk listCB21 5BT: not on the flood risk listCB21 5BW: not on the flood risk listCB21 5BX: not on the flood risk listCB21 5BY: not on the flood risk listCB21 5DA: not on the flood risk listCB21 5DB: not on the flood risk listCB21 5DE: not on the flood risk listCB21 5DH: not on the flood risk listCB21 5DJ: not on the flood risk listCB21 5DL: not on the flood risk listCB21 5DN: not on the flood risk listCB21 5DP: not on the flood risk listCB21 5DQ: not on the flood risk listCB21 5DR: not on the flood risk listCB21 5DT: not on the flood risk listCB21 5DU: not on the flood risk listCB21 5DZ: not on the flood risk listCB21 5EB: not on the flood risk listCB21 5ED: not on the flood risk listCB21 5EF: not on the flood risk listCB21 5EG: not on the flood risk listCB21 5EH: not on the flood risk listCB21 5EJ: not on the flood risk listCB21 5EQ: not on the flood risk listCB21 5ER: not on the flood risk listCB21 5ES: not on the flood risk listCB21 5ET: not on the flood risk listCB21 5EU: not on the flood risk listCB21 5EY: not on the flood risk listCB21 5GT: not on the flood risk listCB21 5HA: not on the flood risk listCB21 5HD: not on the flood risk listCB21 5HE: not on the flood risk listCB21 5HF: not on the flood risk listCB21 5HH: not on the flood risk listCB21 5HJ: not on the flood risk listCB21 5HL: not on the flood risk listCB21 5HQ: not on the flood risk listCB21 5HR: not on the flood risk listCB21 5HZ: not on the flood risk listCB21 5JA: not on the flood risk listCB21 5JB: not on the flood risk listCB21 5JD: not on the flood risk listCB21 5JE: not on the flood risk listCB21 5JF: not on the flood risk listCB21 5JG: not on the flood risk listCB21 5JH: not on the flood risk listCB21 5JJ: not on the flood risk listCB21 5JL: not on the flood risk listCB21 5JP: not on the flood risk listCB21 5JQ: not on the flood risk listCB21 5JT: not on the flood risk listCB21 5JW: not on the flood risk listCB21 5JY: not on the flood risk listCB21 5JZ: not on the flood risk listCB21 5LA: not on the flood risk listCB21 5LB: not on the flood risk listCB21 5LD: not on the flood risk listCB21 5LE: not on the flood risk listCB21 5LF: not on the flood risk listCB21 5LP: not on the flood risk listCB21 5LQ: not on the flood risk listCB21 5LR: not on the flood risk listCB21 5LS: not on the flood risk listCB21 5LT: not on the flood risk listCB21 5LU: not on the flood risk listCB21 5LY: not on the flood risk listCB21 5NA: not on the flood risk listCB21 5NF: not on the flood risk listCB21 5NH: not on the flood risk listCB21 5NJ: not on the flood risk listCB21 5NL: not on the flood risk listCB21 5NP: not on the flood risk listCB21 5NR: not on the flood risk listCB21 5NT: not on the flood risk listCB21 5NU: not on the flood risk listCB21 5NX: not on the flood risk listCB21 5NY: not on the flood risk listCB21 5NZ: not on the flood risk listCB21 5PA: not on the flood risk listCB21 5PE: not on the flood risk listCB21 5PH: not on the flood risk listCB21 5RJ: not on the flood risk listCB21 5TA: not on the flood risk listCB21 5XA: not on the flood risk listCB21 5XE: not on the flood risk listCB21 5XY: not on the flood risk listCB21 5NS: low flood risk at worstCB21 5PF: medium flood risk at worstCB21 5LG: high flood riskCB21 5NE: high flood risk CambridgeGreat Shelford and StaplefordFulbourn Map of every postcode in the CB21 5 sector, by flood risk Of the 149 postcodes in the CB21 5 sector that ONS places, 2 have a home or business at high risk, 1 are at medium risk at worst, 1 are at low risk at worst and 145 are not on the Environment Agency's at-risk list. Places named: Cambridge, Great Shelford and Stapleford, Fulbourn. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 5 km. A1303A1301A1304 CambridgeGreat Shelford and StaplefordFulbourn
  • A home or business at high risk: 2
  • At medium risk at worst: 1
  • At low risk at worst: 1
  • At very low risk only: 0
  • Not on the at-risk list: 145

Of the 149 postcodes in the CB21 5 sector that ONS places, 2 have a home or business at high risk, 1 are at medium risk at worst, 1 are at low risk at worst and 145 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 5LG2 at high riskCB21 5NE1 at high risk

What do homes sell for in CB21 5?

Homes in CB21 5 sold for a typical £490,000 in the 12 months to August 2026, across 53 sales, down 13.3% on the 12 months before, HM Land Registry's figures show.

£490,000 typical price, the 12 months to August 2026
£565,202 12 months to August 2025
▼ down 13.3% on the 12 months before
  • Detached £691,250 27 sales
  • Semi-detached £425,000 15 sales
  • Terraced £340,000 10 sales
  • Flat or maisonette 1 sale, 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 5. 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 5

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 5AACB21 5ABCB21 5ADCB21 5AECB21 5AFCB21 5AGCB21 5AHCB21 5AJCB21 5ALCB21 5ANCB21 5APCB21 5AQCB21 5ARCB21 5ASCB21 5ATCB21 5AYCB21 5AZCB21 5BACB21 5BBCB21 5BFCB21 5BGCB21 5BHCB21 5BJCB21 5BLCB21 5BNCB21 5BSCB21 5BTCB21 5BUCB21 5BWCB21 5BXCB21 5BYCB21 5BZCB21 5DACB21 5DBCB21 5DDCB21 5DECB21 5DFCB21 5DHCB21 5DJCB21 5DLCB21 5DNCB21 5DPCB21 5DQCB21 5DRCB21 5DSCB21 5DTCB21 5DUCB21 5DWCB21 5DXCB21 5DYCB21 5DZCB21 5EACB21 5EBCB21 5EDCB21 5EFCB21 5EGCB21 5EHCB21 5EJCB21 5EPCB21 5EQCB21 5ERCB21 5ESCB21 5ETCB21 5EUCB21 5EWCB21 5EXCB21 5EYCB21 5EZCB21 5GACB21 5GTCB21 5HACB21 5HBCB21 5HDCB21 5HECB21 5HFCB21 5HGCB21 5HHCB21 5HJCB21 5HLCB21 5HNCB21 5HQCB21 5HRCB21 5HSCB21 5HTCB21 5HUCB21 5HWCB21 5HXCB21 5HYCB21 5HZCB21 5JACB21 5JBCB21 5JDCB21 5JECB21 5JFCB21 5JGCB21 5JHCB21 5JJCB21 5JLCB21 5JNCB21 5JPCB21 5JQCB21 5JSCB21 5JTCB21 5JWCB21 5JYCB21 5JZCB21 5LACB21 5LBCB21 5LDCB21 5LECB21 5LFCB21 5LGCB21 5LJCB21 5LPCB21 5LQCB21 5LRCB21 5LSCB21 5LTCB21 5LUCB21 5LYCB21 5NACB21 5NECB21 5NFCB21 5NHCB21 5NJCB21 5NLCB21 5NPCB21 5NQCB21 5NRCB21 5NSCB21 5NTCB21 5NUCB21 5NXCB21 5NYCB21 5NZCB21 5PACB21 5PBCB21 5PECB21 5PFCB21 5PHCB21 5RHCB21 5RJCB21 5TACB21 5XACB21 5XBCB21 5XECB21 5XGCB21 5XNCB21 5XY

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.