CM21 9 postcode sector in the CM21 district

CM21 9 is a sector of the CM21 district: every postcode that starts CM21 9. It has 175 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 CM21 9 sector, by gigabit broadband

Map of every postcode in the CM21 9 sector, by gigabit broadband Of the 175 postcodes in the CM21 9 sector that ONS places, 31 have no home or business that can get gigabit, 45 have some that can, 98 can all get it and 1 have no Ofcom figure. 2 groups of postcodes without gigabit are outlined: 8 postcodes without gigabit; 8 postcodes without gigabit. 2 postcodes lie beyond the edge and are listed under the map. Places named: Sawbridgeworth. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A1184 CM21 9AA: no Ofcom figureCM21 9AH: gigabit for allCM21 9AQ: gigabit for allCM21 9AT: gigabit for allCM21 9BA: gigabit for allCM21 9BE: gigabit for allCM21 9BG: gigabit for allCM21 9BH: gigabit for allCM21 9BJ: gigabit for allCM21 9BL: gigabit for allCM21 9BN: gigabit for allCM21 9BQ: gigabit for allCM21 9BX: gigabit for allCM21 9BY: gigabit for allCM21 9DA: gigabit for allCM21 9DE: gigabit for allCM21 9DF: gigabit for allCM21 9DG: gigabit for allCM21 9DH: gigabit for allCM21 9DJ: gigabit for allCM21 9DL: gigabit for allCM21 9DN: gigabit for allCM21 9DP: gigabit for allCM21 9DQ: gigabit for allCM21 9DR: gigabit for allCM21 9DS: gigabit for allCM21 9DT: gigabit for allCM21 9DU: gigabit for allCM21 9DW: gigabit for allCM21 9DX: gigabit for allCM21 9EA: gigabit for allCM21 9EJ: gigabit for allCM21 9ER: gigabit for allCM21 9ES: gigabit for allCM21 9EU: gigabit for allCM21 9EX: gigabit for allCM21 9EY: gigabit for allCM21 9FA: gigabit for allCM21 9FB: gigabit for allCM21 9FE: gigabit for allCM21 9FF: gigabit for allCM21 9FJ: gigabit for allCM21 9HA: gigabit for allCM21 9HB: gigabit for allCM21 9HD: gigabit for allCM21 9HE: gigabit for allCM21 9HG: gigabit for allCM21 9HH: gigabit for allCM21 9HJ: gigabit for allCM21 9HL: gigabit for allCM21 9HN: gigabit for allCM21 9JB: gigabit for allCM21 9JE: gigabit for allCM21 9JF: gigabit for allCM21 9JP: gigabit for allCM21 9JR: gigabit for allCM21 9JT: gigabit for allCM21 9LG: gigabit for allCM21 9LH: gigabit for allCM21 9LJ: gigabit for allCM21 9LL: gigabit for allCM21 9LN: gigabit for allCM21 9LP: gigabit for allCM21 9LQ: gigabit for allCM21 9LW: gigabit for allCM21 9LZ: gigabit for allCM21 9NA: gigabit for allCM21 9NE: gigabit for allCM21 9NF: gigabit for allCM21 9NG: gigabit for allCM21 9NH: gigabit for allCM21 9NJ: gigabit for allCM21 9NL: gigabit for allCM21 9NN: gigabit for allCM21 9NP: gigabit for allCM21 9NQ: gigabit for allCM21 9NR: gigabit for allCM21 9NS: gigabit for allCM21 9NT: gigabit for allCM21 9NU: gigabit for allCM21 9NX: gigabit for allCM21 9NY: gigabit for allCM21 9PE: gigabit for allCM21 9PN: gigabit for allCM21 9PR: gigabit for allCM21 9PS: gigabit for allCM21 9PW: gigabit for allCM21 9PX: gigabit for allCM21 9PY: gigabit for allCM21 9PZ: gigabit for allCM21 9QG: gigabit for allCM21 9QH: gigabit for allCM21 9QJ: gigabit for allCM21 9QL: gigabit for allCM21 9QW: gigabit for allCM21 9RD: gigabit for allCM21 9RE: gigabit for allCM21 9TD: gigabit for allCM21 9AB: some gigabitCM21 9AE: some gigabitCM21 9AG: some gigabitCM21 9AJ: some gigabitCM21 9AN: some gigabitCM21 9AR: some gigabitCM21 9AX: some gigabitCM21 9AY: some gigabitCM21 9AZ: some gigabitCM21 9BB: some gigabitCM21 9BD: some gigabitCM21 9BS: some gigabitCM21 9BU: some gigabitCM21 9DB: some gigabitCM21 9DD: some gigabitCM21 9DY: some gigabitCM21 9EH: some gigabitCM21 9EN: some gigabitCM21 9ET: some gigabitCM21 9FD: some gigabitCM21 9GY: some gigabitCM21 9HT: some gigabitCM21 9HU: some gigabitCM21 9JJ: some gigabitCM21 9JN: some gigabitCM21 9JS: some gigabitCM21 9JX: some gigabitCM21 9JY: some gigabitCM21 9JZ: some gigabitCM21 9LF: some gigabitCM21 9NB: some gigabitCM21 9ND: some gigabitCM21 9NW: some gigabitCM21 9PF: some gigabitCM21 9PP: some gigabitCM21 9PT: some gigabitCM21 9PU: some gigabitCM21 9QA: some gigabitCM21 9QD: some gigabitCM21 9QE: some gigabitCM21 9QN: some gigabitCM21 9RA: some gigabitCM21 9AD: no gigabitCM21 9BW: no gigabitCM21 9BZ: no gigabitCM21 9EB: no gigabitCM21 9ED: no gigabitCM21 9EF: no gigabitCM21 9EL: no gigabitCM21 9EP: no gigabitCM21 9EW: no gigabitCM21 9FG: no gigabitCM21 9FH: no gigabitCM21 9FN: no gigabitCM21 9FP: no gigabitCM21 9FQ: no gigabitCM21 9GZ: no gigabitCM21 9HP: no gigabitCM21 9HR: no gigabitCM21 9HS: no gigabitCM21 9HZ: no gigabitCM21 9JA: no gigabitCM21 9JG: no gigabitCM21 9JL: no gigabitCM21 9LD: no gigabitCM21 9LE: no gigabitCM21 9LR: no gigabitCM21 9PL: no gigabitCM21 9QP: no gigabitCM21 9QU: no gigabitCM21 9RB: no gigabitCM21 9RF: no gigabitCM21 9RG: no gigabit Sawbridgeworth 8 postcodes without gigabit, outlined: this goes to CM21 9JG, the one nearest the middle of them8 postcodes without gigabit8 postcodes without gigabit, outlined: this goes to CM21 9RG, the one nearest the middle of them8 postcodes without gigabit Map of every postcode in the CM21 9 sector, by gigabit broadband Of the 175 postcodes in the CM21 9 sector that ONS places, 31 have no home or business that can get gigabit, 45 have some that can, 98 can all get it and 1 have no Ofcom figure. 2 groups of postcodes without gigabit are outlined: 8 postcodes without gigabit; 8 postcodes without gigabit. 2 postcodes lie beyond the edge and are listed under the map. Places named: Sawbridgeworth. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. Sawbridgeworth
  • No home or business can get gigabit: 31
  • Some can get gigabit: 45
  • Every home and business can get gigabit: 98
  • Ofcom gives no figure: 1
  • Outline: where 5 or more postcodes without gigabit lie together

Of the 175 postcodes in the CM21 9 sector that ONS places, 31 have no home or business that can get gigabit, 45 have some that can, 98 can all get it and 1 have no Ofcom figure.

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. 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.

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; Ofcom Connected Nations, Connected Nations, Spring 2026; roads, rivers and built-up areas: Ordnance Survey open maps. 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.

Postcodes without gigabit

31 postcodes here have no gigabit. These are the 12 first in postcode order.

CM21 9ADCM21 9BWCM21 9BZCM21 9EBCM21 9EDCM21 9EFCM21 9ELCM21 9EPCM21 9EWCM21 9FGCM21 9FHCM21 9FN

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.

CM21 9HXCM21 9HY

Where the postcodes without gigabit lie together

  • 8 postcodes without gigabit, outlined on the map. CM21 9JG, is the one nearest the middle of them.
  • 8 postcodes without gigabit, outlined on the map. CM21 9RG, is the one nearest the middle of them.

What do homes sell for in CM21 9?

Homes in CM21 9 sold for a typical £391,000 in the 12 months to September 2026, across 84 sales, HM Land Registry's figures show. The 12 months before gave £385,000 from 133 sales: not a change larger than chance would explain, given which homes happened to sell.

£391,000 typical price, the 12 months to September 2026
£385,000 12 months to September 2025
  • Detached £622,500 17 sales
  • Semi-detached £465,000 23 sales
  • Terraced £345,000 21 sales
  • Flat or maisonette £218,000 23 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 CM21 9. 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 October 2026.

Postcodes in CM21 9

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.

CM21 9AACM21 9ABCM21 9ADCM21 9AECM21 9AGCM21 9AHCM21 9AJCM21 9ANCM21 9AQCM21 9ARCM21 9ATCM21 9AXCM21 9AYCM21 9AZCM21 9BACM21 9BBCM21 9BDCM21 9BECM21 9BGCM21 9BHCM21 9BJCM21 9BLCM21 9BNCM21 9BQCM21 9BSCM21 9BUCM21 9BWCM21 9BXCM21 9BYCM21 9BZCM21 9DACM21 9DBCM21 9DDCM21 9DECM21 9DFCM21 9DGCM21 9DHCM21 9DJCM21 9DLCM21 9DNCM21 9DPCM21 9DQCM21 9DRCM21 9DSCM21 9DTCM21 9DUCM21 9DWCM21 9DXCM21 9DYCM21 9EACM21 9EBCM21 9EDCM21 9EFCM21 9EHCM21 9EJCM21 9ELCM21 9ENCM21 9EPCM21 9ERCM21 9ESCM21 9ETCM21 9EUCM21 9EWCM21 9EXCM21 9EYCM21 9FACM21 9FBCM21 9FDCM21 9FECM21 9FFCM21 9FGCM21 9FHCM21 9FJCM21 9FNCM21 9FPCM21 9FQCM21 9FRCM21 9GYCM21 9GZCM21 9HACM21 9HBCM21 9HDCM21 9HECM21 9HGCM21 9HHCM21 9HJCM21 9HLCM21 9HNCM21 9HPCM21 9HRCM21 9HSCM21 9HTCM21 9HUCM21 9HXCM21 9HYCM21 9HZCM21 9JACM21 9JBCM21 9JECM21 9JFCM21 9JGCM21 9JHCM21 9JJCM21 9JLCM21 9JNCM21 9JPCM21 9JRCM21 9JSCM21 9JTCM21 9JXCM21 9JYCM21 9JZCM21 9LDCM21 9LECM21 9LFCM21 9LGCM21 9LHCM21 9LJCM21 9LLCM21 9LNCM21 9LPCM21 9LQCM21 9LRCM21 9LWCM21 9LZCM21 9NACM21 9NBCM21 9NDCM21 9NECM21 9NFCM21 9NGCM21 9NHCM21 9NJCM21 9NLCM21 9NNCM21 9NPCM21 9NQCM21 9NRCM21 9NSCM21 9NTCM21 9NUCM21 9NWCM21 9NXCM21 9NYCM21 9PECM21 9PFCM21 9PLCM21 9PNCM21 9PPCM21 9PRCM21 9PSCM21 9PTCM21 9PUCM21 9PWCM21 9PXCM21 9PYCM21 9PZCM21 9QACM21 9QDCM21 9QECM21 9QGCM21 9QHCM21 9QJCM21 9QLCM21 9QNCM21 9QPCM21 9QUCM21 9QWCM21 9RACM21 9RBCM21 9RDCM21 9RECM21 9RFCM21 9RGCM21 9TD

Source: ONS Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed.

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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Where the facts on this page come from

Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0.

Licence: Open Government Licence v3.0.

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