CM23 3 postcode sector in the CM23 district

CM23 3 is a sector of the CM23 district: every postcode that starts CM23 3. It has 265 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 CM23 3 sector, and which are new since 2020

Map of every postcode in the CM23 3 sector, by new since 2020 Of the 265 postcodes in the CM23 3 sector that ONS places, 9 are new since 2020 and 256 were in use before 2020. One group of new postcodes is outlined: 9 new postcodes since 2020. One postcode lies beyond the edge and is listed under the map. Places named: Bishop's Stortford. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A1060 CM23 3AA: before 2020CM23 3AB: before 2020CM23 3AD: before 2020CM23 3AE: before 2020CM23 3AG: before 2020CM23 3AJ: before 2020CM23 3AL: before 2020CM23 3AP: before 2020CM23 3AR: before 2020CM23 3AS: before 2020CM23 3AT: before 2020CM23 3AW: before 2020CM23 3AX: before 2020CM23 3AY: before 2020CM23 3AZ: before 2020CM23 3BA: before 2020CM23 3BD: before 2020CM23 3BE: before 2020CM23 3BG: before 2020CM23 3BJ: before 2020CM23 3BL: before 2020CM23 3BN: before 2020CM23 3BP: before 2020CM23 3BQ: before 2020CM23 3BS: before 2020CM23 3BT: before 2020CM23 3BX: before 2020CM23 3BY: before 2020CM23 3DA: before 2020CM23 3DD: before 2020CM23 3DE: before 2020CM23 3DH: before 2020CM23 3DP: before 2020CM23 3DQ: before 2020CM23 3DR: before 2020CM23 3DS: before 2020CM23 3DT: before 2020CM23 3DW: before 2020CM23 3DX: before 2020CM23 3DY: before 2020CM23 3EB: before 2020CM23 3EE: before 2020CM23 3EG: before 2020CM23 3EH: before 2020CM23 3EJ: before 2020CM23 3EL: before 2020CM23 3EN: before 2020CM23 3EP: before 2020CM23 3ER: before 2020CM23 3ES: before 2020CM23 3ET: before 2020CM23 3EU: before 2020CM23 3EX: before 2020CM23 3EY: before 2020CM23 3EZ: before 2020CM23 3FD: before 2020CM23 3FE: before 2020CM23 3FL: before 2020CM23 3FN: before 2020CM23 3FP: before 2020CM23 3FQ: before 2020CM23 3FR: before 2020CM23 3FS: before 2020CM23 3FT: before 2020CM23 3GA: before 2020CM23 3GB: before 2020CM23 3GD: before 2020CM23 3GE: before 2020CM23 3GG: before 2020CM23 3GH: before 2020CM23 3GJ: before 2020CM23 3GN: before 2020CM23 3GQ: before 2020CM23 3GR: before 2020CM23 3GW: before 2020CM23 3GX: before 2020CM23 3GY: before 2020CM23 3HA: before 2020CM23 3HB: before 2020CM23 3HD: before 2020CM23 3HE: before 2020CM23 3HF: before 2020CM23 3HG: before 2020CM23 3HJ: before 2020CM23 3HL: before 2020CM23 3HN: before 2020CM23 3HP: before 2020CM23 3HR: before 2020CM23 3HS: before 2020CM23 3HT: before 2020CM23 3HU: before 2020CM23 3HX: before 2020CM23 3HZ: before 2020CM23 3JA: before 2020CM23 3JB: before 2020CM23 3JD: before 2020CM23 3JE: before 2020CM23 3JG: before 2020CM23 3JH: before 2020CM23 3JJ: before 2020CM23 3JL: before 2020CM23 3JN: before 2020CM23 3JP: before 2020CM23 3JQ: before 2020CM23 3JR: before 2020CM23 3JS: before 2020CM23 3JT: before 2020CM23 3JU: before 2020CM23 3JW: before 2020CM23 3JX: before 2020CM23 3JY: before 2020CM23 3JZ: before 2020CM23 3LA: before 2020CM23 3LE: before 2020CM23 3LH: before 2020CM23 3LJ: before 2020CM23 3LL: before 2020CM23 3LN: before 2020CM23 3LQ: before 2020CM23 3LR: before 2020CM23 3LS: before 2020CM23 3LU: before 2020CM23 3LY: before 2020CM23 3LZ: before 2020CM23 3NA: before 2020CM23 3NB: before 2020CM23 3ND: before 2020CM23 3NE: before 2020CM23 3NF: before 2020CM23 3NG: before 2020CM23 3NH: before 2020CM23 3NJ: before 2020CM23 3NL: before 2020CM23 3NN: before 2020CM23 3NP: before 2020CM23 3NQ: before 2020CM23 3NR: before 2020CM23 3NS: before 2020CM23 3NT: before 2020CM23 3NX: before 2020CM23 3PA: before 2020CM23 3PB: before 2020CM23 3PD: before 2020CM23 3PE: before 2020CM23 3PF: before 2020CM23 3PH: before 2020CM23 3PJ: before 2020CM23 3PL: before 2020CM23 3PN: before 2020CM23 3PP: before 2020CM23 3PQ: before 2020CM23 3PR: before 2020CM23 3PS: before 2020CM23 3PT: before 2020CM23 3PU: before 2020CM23 3PW: before 2020CM23 3PX: before 2020CM23 3PY: before 2020CM23 3QA: before 2020CM23 3QB: before 2020CM23 3QD: before 2020CM23 3QE: before 2020CM23 3QF: before 2020CM23 3QG: before 2020CM23 3QH: before 2020CM23 3QJ: before 2020CM23 3QL: before 2020CM23 3QN: before 2020CM23 3QP: before 2020CM23 3QQ: before 2020CM23 3QR: before 2020CM23 3QS: before 2020CM23 3QT: before 2020CM23 3QU: before 2020CM23 3QX: before 2020CM23 3QY: before 2020CM23 3QZ: before 2020CM23 3RA: before 2020CM23 3RD: before 2020CM23 3RE: before 2020CM23 3RG: before 2020CM23 3RH: before 2020CM23 3RJ: before 2020CM23 3RL: before 2020CM23 3RN: before 2020CM23 3RP: before 2020CM23 3RQ: before 2020CM23 3RR: before 2020CM23 3RS: before 2020CM23 3RU: before 2020CM23 3RW: before 2020CM23 3RX: before 2020CM23 3SA: before 2020CM23 3SB: before 2020CM23 3SD: before 2020CM23 3SE: before 2020CM23 3SF: before 2020CM23 3SG: before 2020CM23 3SH: before 2020CM23 3SJ: before 2020CM23 3SL: before 2020CM23 3SN: before 2020CM23 3SP: before 2020CM23 3SQ: before 2020CM23 3SR: before 2020CM23 3SS: before 2020CM23 3ST: before 2020CM23 3SW: before 2020CM23 3SX: before 2020CM23 3SY: before 2020CM23 3TA: before 2020CM23 3TB: before 2020CM23 3TE: before 2020CM23 3TG: before 2020CM23 3TJ: before 2020CM23 3TL: before 2020CM23 3TN: before 2020CM23 3TP: before 2020CM23 3TQ: before 2020CM23 3TR: before 2020CM23 3TS: before 2020CM23 3TT: before 2020CM23 3TU: before 2020CM23 3TW: before 2020CM23 3TX: before 2020CM23 3TY: before 2020CM23 3UA: before 2020CM23 3UB: before 2020CM23 3UD: before 2020CM23 3UE: before 2020CM23 3UH: before 2020CM23 3UJ: before 2020CM23 3UL: before 2020CM23 3UP: before 2020CM23 3US: before 2020CM23 3UT: before 2020CM23 3UU: before 2020CM23 3UZ: before 2020CM23 3WA: before 2020CM23 3WB: before 2020CM23 3WD: before 2020CM23 3XB: before 2020CM23 3XG: before 2020CM23 3XH: before 2020CM23 3XQ: before 2020CM23 3YJ: before 2020CM23 3YL: before 2020CM23 3YN: before 2020CM23 3YP: before 2020CM23 3YR: before 2020CM23 3YS: before 2020CM23 3YT: before 2020CM23 3YW: before 2020CM23 3ZD: before 2020CM23 3FU: new since 2020CM23 3FW: new since 2020CM23 3FX: new since 2020CM23 3GF: new since 2020CM23 3GL: new since 2020CM23 3GT: new since 2020CM23 3GU: new since 2020CM23 3ZF: new since 2020CM23 3ZH: new since 2020 Bishop's Stortford 9 new postcodes since 2020, outlined: this goes to CM23 3GU, the newest of them9 new postcodes since 2020 Map of every postcode in the CM23 3 sector, by new since 2020 Of the 265 postcodes in the CM23 3 sector that ONS places, 9 are new since 2020 and 256 were in use before 2020. One group of new postcodes is outlined: 9 new postcodes since 2020. One postcode lies beyond the edge and is listed under the map. Places named: Bishop's Stortford. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Bishop's Stortford
  • New since 2020: 9
  • In use before 2020: 256
  • Outline: where 5 or more new postcodes since 2020 lie together

Of the 265 postcodes in the CM23 3 sector that ONS places, 9 are new since 2020 and 256 were in use before 2020.

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. New since 2020 means it came into use in January 2020 or later. 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; when each came into use: the same directory; 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 5 newest postcodes

CM23 3GUOctober 2024CM23 3ZFDecember 2023CM23 3ZHNovember 2023CM23 3GLSeptember 2023CM23 3GTSeptember 2023

Further out, not drawn

This postcode lies well apart from the rest, so the map is drawn without it to show the rest closer; it is in every count.

CM23 3DZ

Where the new postcodes lie together

  • 9 new postcodes since 2020, outlined on the map. CM23 3GU, is the newest of them.

What do homes sell for in CM23 3?

Homes in CM23 3 sold for a typical £352,500 in the 12 months to August 2026, across 116 sales, down 1% on the 12 months before, HM Land Registry's figures show.

£352,500 typical price, the 12 months to August 2026
£356,000 12 months to August 2025
▼ down 1% on the 12 months before
  • Detached £505,000 5 sales
  • Semi-detached £435,000 41 sales
  • Terraced £355,000 25 sales
  • Flat or maisonette £260,000 45 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 CM23 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 CM23 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.

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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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