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CM1 1SA

Marconi · Chelmsford · England

Updated September 2026

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Location overview

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Ward
Marconi
Local authority
Chelmsford
Constituency
Chelmsford
Postcode district
CM1
Postcode sector
CM1 1

Nearby postcodes

Nearby postcode distances
Postcode Distance
CM1 1SH 82 m
CM1 1RF 90 m
CM1 1TR 94 m
CM1 1SR 101 m
CM1 1RE 120 m
Complete postcode fields and official codes
Postcode
CM1 1SA
Status
Current
Introduced
1 July 1995
Terminated
Not published
Postcode area
CM
Postcode district
CM1
Postcode sector
CM1 1
Latitude
51.741434
Longitude
0.471915
British National Grid easting
570,762
British National Grid northing
207,638

Statistical and administrative geographies

Country
England · E92000001
Region
East of England · E12000006
Local authority district
Chelmsford · E07000070
Electoral ward
Marconi · E05004106
Parish or community
E43000285
Westminster constituency
Chelmsford · E14001159
Output area
E00170980
Lower layer super output area
Chelmsford 022A · E01034089
Middle layer super output area
Chelmsford 022 · E02006978

Postcode source versions

Explore CM1

Use the wider postcode district to compare the same evidence across more locations.

Schools

Within 3.1 miles of this postcode

View all nearby schools
Open schools
59
Primary
31
Secondary
9

  1. Anglia Ruskin University

    Higher education institutions

    167 m

  2. High Trees

    Other independent special school

    267 m

  3. Chelmsford County High School for Girls

    Academy converter

    357 m

Recorded crime

Within 1 mile of this postcode

View all nearby crime records
Published events
5,983
Months covered
12
Latest month
June 2026

Most recorded categories in this period

  • Violence and sexual offences 2,483
  • Shoplifting 901
  • Public order 480
  • Anti social behaviour 383
  • Drugs 379

Census 2021

Population and age profile

Postcode residents
354

208 female, 146 male

Postcode households
Not supplied
Residents per household
Not available
CM1 1 residents
6,263

Age bands in CM1 1

Wider postcode sector
Age 0 to 14
12.8%

769 residents

Age 15 to 24
18%

1,081 residents

Age 25 to 44
46.5%

2,789 residents

Age 45 to 64
14.8%

889 residents

Age 65 and over
7.7%

464 residents

This postcode contained 5.7% of the sector's usual residents on Census Day. The age profile describes the wider CM1 1 sector, not people in this individual postcode.

How to read these estimates
The standard postcode headcounts and the commissioned age table are separate ONS outputs. Small counts are disclosure-controlled, and totals can differ slightly between tables. Coverage is England and Wales only.

Census Day: 21 March 2021. Sources: ONS/Nomis P001-P004 and ONS CT21_0228. Age table version 2024-04-08.

Fixed broadband coverage

Ofcom's predicted availability across all residential and commercial premises in this postcode in January 2026.

Superfast, 30 Mbit/s+
100%
Ultrafast, 100 Mbit/s+
45.7%
Ultrafast, 300 Mbit/s+
45.7%
Gigabit-capable
45.7%
Unable to receive decent fixed or FWA broadband
0%
Next Generation Access
100%
Decent broadband available from fixed wireless
0%
Coverage is a modelled postcode-level snapshot, not a speed test or a guarantee for a named property. Check availability with providers before making a decision. Ofcom does not publish postcode-level full-fibre coverage in this release for commercial-confidentiality reasons.

Source: Ofcom Connected Nations Spring 2026, version 2026-01-v2. Contains Ofcom data licensed under the Open Government Licence v3.0.

NHS ODS

GP practices

9

within 5 km

  • RIVERMEAD GATE MED.CTR.

    123 RECTORY LANE, CHELMSFORD, CM1 1TR

    ODS code F81071

    94 m

  • CHELMER MEDICAL PARTNERSHIP

    20 MERLIN PLACE, CHELMSFORD, CM1 4HW

    ODS code F81122

    1.2 km

  • BEAUCHAMP HOUSE

    37 BADDOW ROAD, CHELMSFORD, CM2 0DB

    ODS code F81083

    1.3 km

  • SUTHERLAND LODGE SURGERY

    115 BADDOW ROAD, CHELMSFORD, CM2 7PY

    ODS code F81117

    1.9 km

  • WHITLEY HOUSE SURGERY

    CROMPTON BLD, WRITTLE ROAD, CHELMSFORD, CM1 3RW

    ODS code F81057

    2.0 km

  • CHELMER VILLAGE SURGERY

    ASHTON PLACE, CHELMER VILLAGE, CHELMSFORD, CM2 6ST

    ODS code F81665

    2.4 km

  • NORTH CHELMSFORD NHS HCC

    2 WHITE HART LANE, CHELMSFORD, CM2 5EF

    ODS code Y02611

    2.9 km

  • THE WRITTLE SURGERY

    16A LORDSHIP ROAD, WRITTLE, CHELMSFORD, CM1 3EH

    ODS code F81098

    3.3 km

  • BADDOW VILLAGE SURGERY

    LONGMEAD AVENUE, GREAT BADDOW, CHELMSFORD, CM2 7EZ

    ODS code F81114

    3.3 km

Organisation records, not service availability
These are records marked active in NHS England's Organisation Data Service for England and Wales. Branch surgeries, pharmacies, dentists and hospitals are not included. They do not confirm patient registration, services, opening hours, appointments or care quality. Distances are straight-line from the postcode point.

Source acquired on 2026-09-03. Contains information from NHS England, licenced under the current version of the Open Government Licence.

Nearby transport

  • Anglia Ruskin University

    BCT · Chelmsford

    0.1 miles

  • Anglia Ruskin University

    BCT · Chelmsford

    0.1 miles

  • Keene Home

    BCT · Chelmsford

    0.2 miles

  • King Edward VI School

    BCT · Chelmsford

    0.3 miles

  • Keene Home

    BCT · Chelmsford

    0.3 miles

Relative deprivation

English Indices of Deprivation 2025 for Chelmsford 022A, the published LSOA linked to this postcode. Decile 1 contains the most deprived 10% of English LSOAs and decile 10 the least deprived 10%.

Overall IMD decile

7 of 10

Overall England rank

22,220 of 33,755

Income
7 of 10
Employment
7 of 10
Education and skills
6 of 10
Health and disability
6 of 10
Crime
5 of 10
Housing and services
8 of 10
Living environment
5 of 10

These are relative area statistics, not measures of an individual household, affluence or absolute change. They cannot be compared with indices for other UK nations. Source: English Indices of Deprivation 2025, version 2025-v2.

Flood risk

Environment Agency long-term indicators for the area around addresses in this postcode. They are not an assessment of any individual property and do not show current or forecast flooding.

High risk addresses
0
Medium risk addresses
4
Low risk addresses
0
Groundwater flood alert area
Unlikely

Source: Environment Agency flood-risk postcode search tool data, version 2026-06-18. Check the long-term risk for an individual area. © Environment Agency copyright and/or database right 2025. All rights reserved.

Evidence in context

A factual reading of the data in this report's scope. It is not a location score or a recommendation.

Schools

Published establishments

59 open schools are in scope, including 31 primary and 9 secondary schools. Anglia Ruskin University is the nearest published school at 167 m.

Counts describe active establishment records. They do not assess admissions, catchments or quality.

Recorded crime

Published police records

5,983 published events cover 12 months, averaging 498.583 events per published month. The largest recorded category is Violence and sexual offences with 2,483 events.

The source publishes anonymised street-level events. These figures are not a measure of safety for an individual address.