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CO3 3GT

Castle · Colchester · England

Updated September 2026

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Location overview

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Post town
Colchester
Ward
Castle
Local authority
Colchester
Constituency
Colchester
Postcode district
CO3
Postcode sector
CO3 3

Nearby postcodes

Nearby postcode distances
Postcode Distance
CO3 3WG 149 m
CO3 3LL 162 m
CO3 3LF 163 m
CO3 3AB 169 m
CO3 3LD 189 m
Complete postcode fields and official codes
Postcode
CO3 3GT
Status
Current
Introduced
1 December 1999
Terminated
Not published
Postcode area
CO
Postcode district
CO3
Postcode sector
CO3 3
Latitude
51.892707
Longitude
0.890543
British National Grid easting
598,992
British National Grid northing
225,520

Statistical and administrative geographies

Country
England · E92000001
Region
East of England · E12000006
Local authority district
Colchester · E07000071
Electoral ward
Castle · E05010828
Parish or community
E43000228
Westminster constituency
Colchester · E14001176
Output area
E00176378
Lower layer super output area
Colchester 007A · E01021646
Middle layer super output area
Colchester 007 · E02004512

Postcode source versions

Explore CO3

Property

View all property records
3 recorded sales at this postcode
Address Date Price
Unit B3, Sheepen Road Retail Park, Colchester, CO3 3GT 23 February 2022 £13,100,000
Unit D, Sheepen Road Retail Park, Colchester, CO3 3GT 11 January 2017 £135,043
Unit B2, Sheepen Road Retail Park, Colchester, CO3 3GT 29 July 2015 £81,294

Schools

Within 3.1 miles of this postcode

View all nearby schools
Open schools
62
Primary
40
Secondary
11

  1. Colchester Institute

    Further education

    162 m

  2. St Helena School

    Academy converter

    312 m

  3. The Sixth Form College Colchester

    Academy 16-19 converter

    352 m

Recorded crime

Within 1 mile of this postcode

View all nearby crime records
Published events
4,872
Months covered
12
Latest month
June 2026

Most recorded categories in this period

  • Violence and sexual offences 2,089
  • Shoplifting 621
  • Anti social behaviour 391
  • Public order 367
  • Other theft 303

Census 2021

Population and age profile

Postcode residents
Not supplied
Postcode households
Not supplied
Residents per household
Not available
CO3 3 residents
8,171

Age bands in CO3 3

Wider postcode sector
Age 0 to 14
15.6%

1,255 residents

Age 15 to 24
11.2%

901 residents

Age 25 to 44
24.8%

1,993 residents

Age 45 to 64
28.3%

2,270 residents

Age 65 and over
20%

1,608 residents

Small counts are adjusted for privacy, so totals can differ slightly between Census tables.

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+
0%
Ultrafast, 100 Mbit/s+
0%
Ultrafast, 300 Mbit/s+
0%
Gigabit-capable
0%
Unable to receive decent fixed or FWA broadband
0%
Next Generation Access
0%
Decent broadband available from fixed wireless
0%

Predicted coverage, not measured speeds. Check availability for your address with a provider. Postcode-level full-fibre figures are not published in this release.

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

GP practices

12

within 5 km

  • BEACON HOUSE MINISTRIES

    24 CROUCH STREET, COLCHESTER, CO3 3ES

    ODS code Y01297

    651 m

  • CREFFIELD MEDICAL GROUP

    CREFFIELD MEDICAL CENTRE, 15 CAVALRY ROAD, COLCHESTER, CO2 7GH

    ODS code F81115

    1.2 km

  • COLCHESTER MEDICAL PRACTICE

    78 EAST HILL, COLCHESTER, CO1 2QS

    ODS code F81042

    1.3 km

  • EAST HILL SURGERY

    78 EAST HILL, COLCHESTER, CO1 2RW

    ODS code F81091

    1.3 km

  • ABBEY FIELD MEDICAL CENTRE

    YPRES ROAD, COLCHESTER, CO2 7UW

    ODS code F81095

    1.8 km

  • TURNER ROAD SURGERY

    THE PRIMARY CARE CENTRE, TURNER ROAD, COLCHESTER, CO4 5JR

    ODS code Y02646

    1.8 km

  • MILL ROAD SURGERY

    47 MILL ROAD, MILE END, COLCHESTER, CO4 5LE

    ODS code F81636

    2.2 km

  • AMBROSE AVENUE GROUP PRACTICE

    76 AMBROSE AVENUE, COLCHESTER, CO3 4LN

    ODS code F81067

    2.3 km

  • HIGHWOODS SURGERY

    HIGHWOODS SQUARE, HIGHWOODS, COLCHESTER, CO4 9SR

    ODS code F81679

    2.8 km

  • BLUEBELL SURGERY

    BLUEBELL RESOURCE CENTRE, JACK ANDREWS DRIVE, HIGHWOODS, COLCHESTER, CO4 9YN

    ODS code F81746

    3.4 km

  • WINSTREE MEDICAL PRACTICE

    84 WINSTREE ROAD, STANWAY, COLCHESTER, CO3 0PZ

    ODS code F81069

    3.5 km

  • TOLLGATE HEALTH CENTRE

    145 LONDON ROAD, STANWAY, COLCHESTER, CO3 8NZ

    ODS code F81716

    4.2 km

Main GP practices only; branch surgeries are excluded. Distances are straight-line. Contact the practice to check registration, services, opening hours and appointments.

Source acquired on 2026-09-05. Contains information from NHS England, licenced under the current version of the Open Government Licence.

Nearby transport

  • St Helena School

    BCT · Colchester

    0.2 miles

  • Middleborough

    BCT · Colchester

    0.2 miles

  • Middleborough

    BCT · Colchester

    0.2 miles

  • Middleborough

    BCT · Colchester

    0.2 miles

  • Causton Road

    BCT · Colchester

    0.3 miles

Relative deprivation

English Indices of Deprivation 2025 for Colchester 007A, 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

8 of 10

Overall England rank

23,870 of 33,755

Income
7 of 10
Employment
7 of 10
Education and skills
7 of 10
Health and disability
6 of 10
Crime
4 of 10
Housing and services
9 of 10
Living environment
6 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
0
Low risk addresses
3
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

Property market

The five-year median is £13,100,000 from 1 recorded sale in CO3 3GT. This is a recorded-sale statistic, not a current valuation.

The latest UK House Price Index average for Colchester is £298,003 in June 2026, down 0.3% year on year.

Schools

62 open schools are in scope, including 40 primary and 11 secondary schools. Colchester Institute is the nearest published school at 162 m.

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

Recorded crime

4,872 published events cover 12 months, averaging 406 events per published month. The largest recorded category is Violence and sexual offences with 2,089 events.

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