CM77 postcode district

Postcodes and sectors

462 of the district's 535 postcodes are live in the ONS Postcode Directory of August 2026. A postcode directory says whether a code is in use, never who is there. The live postcodes centre on 51.86597, 0.55342, which locates the district, not a building.

Companies registered in CM77

Companies House lists 1,139 companies with a registered office in CM77; 149 of them at addresses shared by 25 or more companies (1 October 2026 snapshot). 25 is the count at which the address lookup reports a company cluster.

Places OS Open Names lists for CM77

• Essex
• Eastern
• Braintree
• Great Notley
• Rayne
• Tye Green
• Black Notley
• Bradwell
• Stisted
• Cressing
• Long Green
• Hawbush Green
• Blake End
• Uttlesford
• Little Common
• Pattiswick
• Young's End
• Tumbler's Green
• Lanham Green
• Chelmsford
• Perry Green
• Row Green

Roads filed under CM77

Named roads first, then numbered ones. A road is filed under one district even where it runs through several, so a street missing here may be listed under a neighbouring district — which is why the address lookup never calls a British street absent. Great Britain has no open register of buildings, so a listed road never means a building on it exists.

• Adams Drive
• Alverton Close
• Appletree Close
• Ashdown Close
• Ashes Road
• Audley Close
• Avenue East
• Avenue North
• Avenue West
• Aylesbury Drive
• Back Lane
• Baker's Lane
• Barnards Orchard
• Barn Field End
• Bedells Avenue
• Bellgreen Gardens
• Benton Close
• Blackley Lane
• Blickling Road
• Blyth's Way
• Braintree Road
• Brain Valley Avenue
• Bramley Close
• Brancaster Drive
• Bridge End Lane
• Bridge Hall Road
• Brunwin Road
• Buck Hill
• Bulford Lane
• Bulford Mill Lane
• Burghley Close
• Buttermere
• Caldbeck Way
• Campanile Close
• Capel Close
• Capel Road
• Carpenters Drive
• Century Drive
• Chapel Rise
• Charlecote Road
• Charter Way
• Chatsworth Avenue
• Cherry Gardens
• Chestnut Avenue
• Church's Lane
• Church Road
• Claud Ince Avenue
• Clayton Close
• Clevedon Close
• Coggeshall Road
• Cohen Close
• Cokers Close
• Colville Close
• Compasses Road
• Coniston Close
• Constable Way
• Coopers Crescent
• Coronation Way
• Crab Apple Drive
• Crofters Walk

Check an address in CM77

Check an address in CM77

The same road list through the API, from the outward code alone:

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=CM77" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about CM77

What does a CM77 postcode tell you?

That the address lies in the CM77 district of the CM (Chelmsford) postcode area, and the place OS Open Names most often lists first for its postcodes is Great Notley. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 462 live postcodes.

Where the counts come from

• ons-postcode-directory · version 2026-08 · Contains ONS, OS and Royal Mail data © Crown copyright and database right 2026, Open Government Licence v3.0. Northern Ireland postcodes are excluded: their reuse needs a Land & Property Services licence.
• os-open-names · version 2026-11-01 · Contains OS data © Crown copyright and database right 2026, Open Government Licence v3.0.
• uk-companies-house · version 2026-10-01 · Companies House free company data product, Open Government Licence v3.0

What each figure means, and what a district page never says, is set out in Reading a British postcode district page; the glossary defines a postcode district, a postcode area, a postcode directory and a street register.

Data synced on 2026-11-01: the newest version among the datasets listed above.

Districts nearest CM77

• CM73.7 km
• CM88.8 km
• CO912.1 km
• CM9812.9 km
• CM613.0 km
• CM114.7 km
• CM316.2 km
• CM216.8 km
• CM917.2 km
• CO617.6 km
• CO818.9 km
• CO519.0 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids