This is a list of postcodes in the CM1 area covering the areas of Chelmsford, Writtle. The area contains approximately 26,010 households with a population of about 62,632 (2011 census)
Active postcode
Postcode no longer in use| Postcode | Latitude | Longitude | Easting | Northing | Grid reference | Active? |
|---|---|---|---|---|---|---|
| CM1 4JS | 51.750027 | 0.465691 | 570302 | 208580 | TL703085 | Yes |
| CM1 4JT | 51.747814 | 0.465295 | 570283 | 208333 | TL702083 | Yes |
| CM1 4JU | 51.748048 | 0.463555 | 570162 | 208355 | TL701083 | Yes |
| CM1 4JW | 51.747699 | 0.463478 | 570158 | 208316 | TL701083 | Yes |
| CM1 4JX | 51.747042 | 0.465224 | 570281 | 208247 | TL702082 | Yes |
| CM1 4JY | 51.747748 | 0.466306 | 570353 | 208328 | TL703083 | Yes |
| CM1 4JZ | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4LA | 51.746104 | 0.461073 | 569998 | 208133 | TL699081 | Yes |
| CM1 4LB | 51.753367 | 0.380907 | 564438 | 208757 | TL644087 | Yes |
| CM1 4LD | 51.756451 | 0.38359 | 564612 | 209106 | TL646091 | Yes |
| CM1 4LE | 51.757282 | 0.386083 | 564781 | 209204 | TL647092 | Yes |
| CM1 4LF | 51.773109 | 0.35223 | 562388 | 210888 | TL623108 | Yes |
| CM1 4LG | 51.769286 | 0.361249 | 563024 | 210483 | TL630104 | Yes |
| CM1 4LH | 51.76273 | 0.369747 | 563634 | 209773 | TL636097 | Yes |
| CM1 4LJ | 51.763722 | 0.377176 | 564143 | 209900 | TL641098 | Yes |
| CM1 4LL | 51.758764 | 0.386175 | 564782 | 209369 | TL647093 | Yes |
| CM1 4LN | 51.762012 | 0.398462 | 565618 | 209758 | TL656097 | Yes |
| CM1 4LP | 51.755689 | 0.388375 | 564945 | 209032 | TL649090 | Yes |
| CM1 4LQ | 51.771067 | 0.361212 | 563015 | 210681 | TL630106 | Yes |
| CM1 4LR | 51.748692 | 0.384384 | 564695 | 208245 | TL646082 | Yes |
| CM1 4LS | 51.752533 | 0.390121 | 565077 | 208685 | TL650086 | Yes |
| CM1 4LT | 51.750796 | 0.395912 | 565483 | 208505 | TL654085 | Yes |
| CM1 4LU | 51.748769 | 0.400933 | 565837 | 208291 | TL658082 | Yes |
| CM1 4LW | 51.761298 | 0.392019 | 565176 | 209664 | TL651096 | Yes |
| CM1 4LX | 51.743211 | 0.394772 | 565432 | 207659 | TL654076 | Yes |
| CM1 4LY | 51.745821 | 0.396866 | 565567 | 207954 | TL655079 | Yes |
| CM1 4LZ | 51.741152 | 0.378381 | 564308 | 207393 | TL643073 | Yes |
| CM1 4NA | 51.747289 | 0.383962 | 564671 | 208088 | TL646080 | Yes |
| CM1 4NB | 51.747156 | 0.390953 | 565154 | 208089 | TL651080 | Yes |
| CM1 4ND | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4NE | 51.74839 | 0.459271 | 569865 | 208383 | TL698083 | Yes |
| CM1 4NF | 51.74918 | 0.458459 | 569806 | 208469 | TL698084 | Yes |
| CM1 4NG | 51.74523 | 0.46501 | 570273 | 208045 | TL702080 | Yes |
| CM1 4NH | 51.750482 | 0.363441 | 563243 | 208397 | TL632083 | Yes |
| CM1 4NJ | 51.758827 | 0.358109 | 562845 | 209313 | TL628093 | Yes |
| CM1 4NL | 51.75272 | 0.372005 | 563826 | 208665 | TL638086 | Yes |
| CM1 4NN | 51.749034 | 0.354528 | 562633 | 208216 | TL626082 | Yes |
| CM1 4NP | 51.74023 | 0.368801 | 563650 | 207269 | TL636072 | Yes |
| CM1 4NQ | 51.745413 | 0.46615 | 570351 | 208068 | TL703080 | Yes |
| CM1 4NR | 51.743517 | 0.371682 | 563837 | 207641 | TL638076 | Yes |
| CM1 4NS | 51.74772 | 0.376017 | 564121 | 208118 | TL641081 | Yes |
| CM1 4NT | 51.748289 | 0.378988 | 564324 | 208188 | TL643081 | Yes |
| CM1 4NU | 51.749458 | 0.379861 | 564380 | 208320 | TL643083 | Yes |
| CM1 4NW | 51.735464 | 0.348637 | 562275 | 206694 | TL622066 | Yes |
| CM1 4NX | 51.749788 | 0.379574 | 564359 | 208356 | TL643083 | Yes |
| CM1 4NY | 51.750396 | 0.38372 | 564643 | 208433 | TL646084 | Yes |
| CM1 4NZ | 51.749848 | 0.382359 | 564551 | 208369 | TL645083 | Yes |
| CM1 4PA | 51.751334 | 0.383161 | 564601 | 208536 | TL646085 | Yes |
| CM1 4PB | 51.751246 | 0.382621 | 564564 | 208525 | TL645085 | Yes |
| CM1 4PD | 51.751055 | 0.384074 | 564665 | 208507 | TL646085 | Yes |
| CM1 4PE | 51.751519 | 0.380259 | 564400 | 208550 | TL643085 | Yes |
| CM1 4PF | 51.750675 | 0.378838 | 564305 | 208453 | TL643084 | Yes |
| CM1 4PG | 51.74961 | 0.378579 | 564291 | 208334 | TL642083 | Yes |
| CM1 4PH | 51.749487 | 0.377573 | 564222 | 208318 | TL642083 | Yes |
| CM1 4PJ | 51.763165 | 0.360611 | 563002 | 209801 | TL630098 | No |
| CM1 4PL | 51.777858 | 0.345431 | 561902 | 211401 | TL619114 | No |
| CM1 4PN | 51.777858 | 0.345431 | 561902 | 211401 | TL619114 | No |
| CM1 4PP | 51.776575 | 0.345712 | 561926 | 211259 | TL619112 | Yes |
| CM1 4PQ | 51.75001 | 0.377919 | 564244 | 208377 | TL642083 | Yes |
| CM1 4PR | 51.774114 | 0.342888 | 561740 | 210979 | TL617109 | Yes |
| CM1 4PS | 51.76993 | 0.346571 | 562009 | 210522 | TL620105 | Yes |
| CM1 4PT | 51.774066 | 0.339842 | 561530 | 210967 | TL615109 | Yes |
| CM1 4PU | 51.775424 | 0.337607 | 561371 | 211113 | TL613111 | Yes |
| CM1 4PW | 51.75547 | 0.447513 | 569027 | 209143 | TL690091 | No |
| CM1 4PX | 51.776482 | 0.334154 | 561129 | 211223 | TL611112 | Yes |
| CM1 4PY | 51.785619 | 0.334567 | 561125 | 212240 | TL611122 | Yes |
| CM1 4PZ | 51.79153 | 0.332611 | 560969 | 212893 | TL609128 | Yes |
| CM1 4QA | 51.784712 | 0.341306 | 561593 | 212154 | TL615121 | Yes |
| CM1 4QB | 51.777349 | 0.33214 | 560987 | 211315 | TL609113 | Yes |
| CM1 4QD | 51.772888 | 0.347058 | 562032 | 210852 | TL620108 | Yes |
| CM1 4QE | 51.780553 | 0.345571 | 561902 | 211701 | TL619117 | No |
| CM1 4QF | 51.772439 | 0.346599 | 562002 | 210801 | TL620108 | No |
| CM1 4QG | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4QH | 51.786313 | 0.345333 | 561865 | 212341 | TL618123 | Yes |
| CM1 4QJ | 51.793613 | 0.343218 | 561693 | 213148 | TL616131 | Yes |
| CM1 4QL | 51.799389 | 0.343967 | 561724 | 213792 | TL617137 | Yes |
| CM1 4QN | 51.803897 | 0.347001 | 561917 | 214300 | TL619142 | Yes |
| CM1 4QP | 51.810037 | 0.348451 | 561995 | 214986 | TL619149 | Yes |
| CM1 4QQ | 51.80861 | 0.359548 | 562765 | 214852 | TL627148 | Yes |
| CM1 4QR | 51.808593 | 0.355905 | 562514 | 214842 | TL625148 | Yes |
| CM1 4QS | 51.808364 | 0.351193 | 562190 | 214806 | TL621148 | Yes |
| CM1 4QT | 51.809045 | 0.356683 | 562566 | 214894 | TL625148 | Yes |
| CM1 4QU | 51.807706 | 0.364259 | 563093 | 214762 | TL630147 | Yes |
| CM1 4QW | 51.807514 | 0.349611 | 562084 | 214708 | TL620147 | Yes |
| CM1 4QX | 51.808614 | 0.369195 | 563430 | 214874 | TL634148 | Yes |
| CM1 4QY | 51.80923 | 0.372985 | 563689 | 214951 | TL636149 | Yes |
| CM1 4QZ | 51.810878 | 0.35408 | 562380 | 215092 | TL623150 | Yes |
| CM1 4RA | 51.813911 | 0.355733 | 562483 | 215433 | TL624154 | Yes |
| CM1 4RB | 51.821291 | 0.360384 | 562777 | 216264 | TL627162 | Yes |
| CM1 4RD | 51.812181 | 0.338799 | 561322 | 215203 | TL613152 | Yes |
| CM1 4RE | 51.824774 | 0.356663 | 562508 | 216643 | TL625166 | Yes |
| CM1 4RF | 51.755073 | 0.447999 | 569062 | 209100 | TL690090 | No |
| CM1 4RG | 51.792293 | 0.374009 | 563821 | 213070 | TL638130 | Yes |
| CM1 4RH | 51.74646 | 0.462121 | 570069 | 208175 | TL700081 | Yes |
| CM1 4RJ | 51.75547 | 0.447513 | 569027 | 209143 | TL690091 | No |
| CM1 4RL | 51.79423 | 0.363162 | 563066 | 213261 | TL630132 | Yes |
| CM1 4RN | 51.786765 | 0.356449 | 562630 | 212416 | TL626124 | Yes |
| CM1 4RP | 51.786413 | 0.356547 | 562638 | 212377 | TL626123 | Yes |
| CM1 4RQ | 51.747647 | 0.461679 | 570034 | 208306 | TL700083 | Yes |
| CM1 4RR | 51.785591 | 0.355344 | 562558 | 212283 | TL625122 | Yes |
| CM1 4RS | 51.785494 | 0.354832 | 562523 | 212271 | TL625122 | Yes |
| CM1 4RT | 51.785362 | 0.353795 | 562452 | 212254 | TL624122 | Yes |
| CM1 4RU | 51.783935 | 0.355867 | 562600 | 212100 | TL625120 | Yes |
| CM1 4RW | 51.809286 | 0.352271 | 562261 | 214911 | TL622149 | Yes |
| CM1 4RX | 51.783579 | 0.360604 | 562928 | 212071 | TL629120 | Yes |
| CM1 4RY | 51.77677 | 0.35848 | 562806 | 211309 | TL628113 | Yes |
| CM1 4RZ | 51.78311 | 0.366046 | 563305 | 212031 | TL633120 | Yes |
| CM1 4SA | 51.774607 | 0.378314 | 564182 | 211113 | TL641111 | Yes |
| CM1 4SB | 51.784358 | 0.380871 | 564323 | 212203 | TL643122 | Yes |
| CM1 4SD | 51.786757 | 0.385826 | 564656 | 212481 | TL646124 | Yes |
| CM1 4SE | 51.789885 | 0.382801 | 564436 | 212822 | TL644128 | Yes |
| CM1 4SF | 51.796762 | 0.386949 | 564697 | 213596 | TL646135 | Yes |
| CM1 4SG | 51.791948 | 0.382185 | 564386 | 213050 | TL643130 | Yes |
| CM1 4SH | 51.78777 | 0.359735 | 562853 | 212535 | TL628125 | Yes |
| CM1 4SJ | 51.786678 | 0.357663 | 562714 | 212409 | TL627124 | Yes |
| CM1 4SL | 51.786295 | 0.355671 | 562578 | 212362 | TL625123 | Yes |
| CM1 4SN | 51.788808 | 0.382251 | 564402 | 212701 | TL644127 | No |
| CM1 4SP | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4SQ | 51.793197 | 0.37558 | 563926 | 213174 | TL639131 | Yes |
| CM1 4SR | 51.757017 | 0.441438 | 568602 | 209301 | TL686093 | No |
| CM1 4SS | 51.75317 | 0.439636 | 568492 | 208869 | TL684088 | Yes |
| CM1 4ST | 51.759959 | 0.442249 | 568647 | 209630 | TL686096 | Yes |
| CM1 4SU | 51.770975 | 0.437089 | 568250 | 210843 | TL682108 | Yes |
| CM1 4SW | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4SX | 51.771662 | 0.434749 | 568086 | 210914 | TL680109 | Yes |
| CM1 4SY | 51.772194 | 0.434241 | 568049 | 210972 | TL680109 | Yes |
| CM1 4SZ | 51.774344 | 0.429008 | 567680 | 211199 | TL676111 | Yes |
| CM1 4TA | 51.778789 | 0.416213 | 566781 | 211664 | TL667116 | Yes |
| CM1 4TB | 51.775108 | 0.411131 | 566444 | 211243 | TL664112 | Yes |
| CM1 4TD | 51.778361 | 0.405535 | 566046 | 211592 | TL660115 | Yes |
| CM1 4TE | 51.779856 | 0.40544 | 566034 | 211758 | TL660117 | Yes |
| CM1 4TF | 51.780345 | 0.391157 | 565047 | 211780 | TL650117 | Yes |
| CM1 4TG | 51.785695 | 0.391657 | 565062 | 212376 | TL650123 | Yes |
| CM1 4TH | 51.786923 | 0.386502 | 564702 | 212501 | TL647125 | No |
| CM1 4TJ | 51.788602 | 0.393304 | 565165 | 212703 | TL651127 | Yes |
| CM1 4TL | 51.791462 | 0.410902 | 566368 | 213061 | TL663130 | Yes |
| CM1 4TN | 51.774379 | 0.412904 | 566569 | 211166 | TL665111 | Yes |
| CM1 4TP | 51.771839 | 0.410449 | 566409 | 210878 | TL664108 | Yes |
| CM1 4TQ | 51.786783 | 0.38722 | 564752 | 212487 | TL647124 | Yes |
| CM1 4TR | 51.770655 | 0.411604 | 566493 | 210749 | TL664107 | Yes |
| CM1 4TS | 51.769958 | 0.412277 | 566542 | 210673 | TL665106 | Yes |
| CM1 4TT | 51.767006 | 0.408902 | 566320 | 210337 | TL663103 | Yes |
| CM1 4TU | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4TW | 51.772129 | 0.411654 | 566491 | 210913 | TL664109 | Yes |
| CM1 4TX | 51.763376 | 0.415303 | 566775 | 209948 | TL667099 | Yes |
| CM1 4TY | 51.761044 | 0.416338 | 566855 | 209691 | TL668096 | Yes |
| CM1 4TZ | 51.761766 | 0.422304 | 567264 | 209785 | TL672097 | Yes |
| CM1 4UA | 51.755911 | 0.432756 | 568007 | 209158 | TL680091 | Yes |
| CM1 4UB | 51.754274 | 0.449665 | 569180 | 209015 | TL691090 | Yes |
| CM1 4UD | 51.75547 | 0.447513 | 569027 | 209143 | TL690091 | No |
| CM1 4UE | 51.756171 | 0.445392 | 568878 | 209216 | TL688092 | Yes |
| CM1 4UF | 51.754462 | 0.449284 | 569153 | 209035 | TL691090 | Yes |
| CM1 4UG | 51.75632 | 0.443864 | 568772 | 209229 | TL687092 | Yes |
| CM1 4UH | 51.756209 | 0.442278 | 568663 | 209213 | TL686092 | Yes |
| CM1 4UJ | 51.75574 | 0.443601 | 568756 | 209164 | TL687091 | Yes |
| CM1 4UL | 51.753988 | 0.444853 | 568849 | 208972 | TL688089 | Yes |
| CM1 4UN | 51.754513 | 0.441665 | 568627 | 209023 | TL686090 | Yes |
| CM1 4UP | 51.753743 | 0.441029 | 568586 | 208936 | TL685089 | Yes |
| CM1 4UQ | 51.755693 | 0.441555 | 568615 | 209154 | TL686091 | Yes |
| CM1 4UR | 51.752629 | 0.440578 | 568559 | 208811 | TL685088 | Yes |
| CM1 4US | 51.753994 | 0.445825 | 568916 | 208975 | TL689089 | Yes |
| CM1 4UT | 51.753302 | 0.443208 | 568738 | 208892 | TL687088 | Yes |
| CM1 4UU | 51.754683 | 0.445572 | 568896 | 209051 | TL688090 | Yes |
| CM1 4UW | 51.754526 | 0.443607 | 568761 | 209029 | TL687090 | Yes |
| CM1 4UX | 51.755022 | 0.446561 | 568963 | 209091 | TL689090 | Yes |
| CM1 4UY | 51.756654 | 0.447664 | 569033 | 209275 | TL690092 | Yes |
| CM1 4UZ | 51.756308 | 0.449181 | 569139 | 209240 | TL691092 | Yes |
| CM1 4WA | 51.752711 | 0.456506 | 569658 | 208857 | TL696088 | Yes |
| CM1 4WB | 51.752117 | 0.455634 | 569600 | 208789 | TL695087 | Yes |
| CM1 4WD | 51.751664 | 0.457956 | 569762 | 208744 | TL697087 | Yes |
| CM1 4WE | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4WF | 51.753178 | 0.458241 | 569776 | 208913 | TL697089 | Yes |
| CM1 4WG | 51.751977 | 0.456727 | 569676 | 208776 | TL696087 | Yes |
| CM1 4WH | 51.751169 | 0.456249 | 569646 | 208685 | TL696086 | Yes |
| CM1 4WJ | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4WL | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4WN | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4WP | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4WQ | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4WR | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4WS | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4WT | 51.750387 | 0.457959 | 569767 | 208602 | TL697086 | Yes |
| CM1 4WU | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4WW | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4WX | 51.75037 | 0.457915 | 569764 | 208600 | TL697085 | No |
| CM1 4WY | 51.75037 | 0.457915 | 569764 | 208600 | TL697085 | No |
| CM1 4WZ | 51.75037 | 0.457915 | 569764 | 208600 | TL697085 | No |
| CM1 4XA | 51.752789 | 0.445832 | 568921 | 208841 | TL689088 | Yes |
| CM1 4XB | 51.753388 | 0.445154 | 568872 | 208906 | TL688089 | Yes |
| CM1 4XD | 51.752888 | 0.447547 | 569039 | 208856 | TL690088 | Yes |
| CM1 4XE | 51.753532 | 0.446857 | 568989 | 208926 | TL689089 | Yes |
| CM1 4XF | 51.753987 | 0.447491 | 569031 | 208978 | TL690089 | No |
| CM1 4XG | 51.754331 | 0.447799 | 569051 | 209017 | TL690090 | Yes |
| CM1 4XH | 51.755455 | 0.447787 | 569046 | 209142 | TL690091 | Yes |
| CM1 4XJ | 51.73722 | 0.476016 | 571063 | 207180 | TL710071 | No |
| CM1 4XL | 51.752678 | 0.453737 | 569467 | 208847 | TL694088 | Yes |
| CM1 4XN | 51.753894 | 0.453252 | 569429 | 208981 | TL694089 | Yes |
| CM1 4XP | 51.753714 | 0.453692 | 569460 | 208962 | TL694089 | No |
| CM1 4XQ | 51.755223 | 0.449035 | 569133 | 209119 | TL691091 | Yes |
| CM1 4XR | 51.753068 | 0.454483 | 569517 | 208892 | TL695088 | Yes |