Property market
The five-year median is £325,000 from 7 recorded sales in CO1 1UN. 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.
CO1 1UN
Castle · Colchester · England
Updated September 2026
Compare this postcodeLocation overview
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- Post town
- Colchester
- Ward
- Castle
- Local authority
- Colchester
- Constituency
- Colchester
- Postcode district
- CO1
- Postcode sector
- CO1 1
Nearby postcodes
Complete postcode fields and official codes
- Postcode
- CO1 1UN
- Status
- Current
- Introduced
- 1 January 1980
- Terminated
- Not published
- Postcode area
- CO
- Postcode district
- CO1
- Postcode sector
- CO1 1
- Latitude
- 51.891683
- Longitude
- 0.905841
- British National Grid easting
- 600,049
- British National Grid northing
- 225,448
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
- E00188050
- Lower layer super output area
- Colchester 007C · E01021648
- Middle layer super output area
- Colchester 007 · E02004512
Postcode source versions
- Ordnance Survey: Code-Point Open Version 2026-08 · Current postcode units in Great Britain · OGL-3.0
- Office for National Statistics: ONS Postcode Directory Version 2026-08 · United Kingdom; Northern Ireland excluded pending rights review; Crown Dependencies outside product scope · OGL-3.0 with third-party rights
- Ordnance Survey: Boundary-Line Version 2026-05 · Local-authority boundaries in Great Britain · OS OpenData Licence
Explore CO1
Property
63 recorded
sales at this postcode
| Address | Date | Price |
|---|---|---|
| 56, Castle Road, Colchester, CO1 1UN | 21 January 2026 | £340,000 |
| 52, Castle Road, Colchester, CO1 1UN | 19 November 2025 | £325,000 |
| 66, Castle Road, Colchester, CO1 1UN | 8 May 2025 | £295,000 |
Schools
Within 3.1 miles of this postcode
- Open schools
- 63
- Primary
- 42
- Secondary
- 11
- 330 m
St Thomas More's Catholic Primary School, Colchester
Academy converter
- 402 m
St James the Great Church of England Primary School
Academy sponsor led
- 753 m
St John's Green Primary School
Community school
Recorded crime
Within 1 mile of this postcode
- Published events
- 6,126
- Months covered
- 12
- Latest month
- June 2026
Most recorded categories in this period
- Violence and sexual offences 2,661
- Shoplifting 783
- Anti social behaviour 481
- Public order 479
- Criminal damage and arson 368
Census 2021
Population and age profile
- Postcode residents
- 59
- Postcode households
- 30
- Residents per household
- 2.0
- CO1 1 residents
- 5,694
34 female, 25 male
Age bands in CO1 1
Wider postcode sector- Age 0 to 14
- 17%
- Age 15 to 24
- 9.8%
- Age 25 to 44
- 38.8%
- Age 45 to 64
- 21.2%
- Age 65 and over
- 13.2%
923 residents
533 residents
2,110 residents
1,150 residents
717 residents
This postcode contained 1% of the sector's usual residents on Census Day. The age profile describes the wider CO1 1 sector, not people in this individual postcode.
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+
- 94.4%
- Ultrafast, 100 Mbit/s+
- 94.4%
- Ultrafast, 300 Mbit/s+
- 94.4%
- Gigabit-capable
- 94.4%
- Unable to receive decent fixed or FWA broadband
- 0%
- Next Generation Access
- 94.4%
- 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 straight-line
COLCHESTER MEDICAL PRACTICE
78 EAST HILL, COLCHESTER, CO1 2QS
ODS code F81042
303 m
EAST HILL SURGERY
78 EAST HILL, COLCHESTER, CO1 2RW
ODS code F81091
303 m
BEACON HOUSE MINISTRIES
24 CROUCH STREET, COLCHESTER, CO3 3ES
ODS code Y01297
869 m
CREFFIELD MEDICAL GROUP
CREFFIELD MEDICAL CENTRE, 15 CAVALRY ROAD, COLCHESTER, CO2 7GH
ODS code F81115
1.4 km
ABBEY FIELD MEDICAL CENTRE
YPRES ROAD, COLCHESTER, CO2 7UW
ODS code F81095
1.7 km
TURNER ROAD SURGERY
THE PRIMARY CARE CENTRE, TURNER ROAD, COLCHESTER, CO4 5JR
ODS code Y02646
1.7 km
HIGHWOODS SURGERY
HIGHWOODS SQUARE, HIGHWOODS, COLCHESTER, CO4 9SR
ODS code F81679
2.3 km
MILL ROAD SURGERY
47 MILL ROAD, MILE END, COLCHESTER, CO4 5LE
ODS code F81636
2.4 km
BLUEBELL SURGERY
BLUEBELL RESOURCE CENTRE, JACK ANDREWS DRIVE, HIGHWOODS, COLCHESTER, CO4 9YN
ODS code F81746
3.0 km
AMBROSE AVENUE GROUP PRACTICE
76 AMBROSE AVENUE, COLCHESTER, CO3 4LN
ODS code F81067
3.2 km
WINSTREE MEDICAL PRACTICE
84 WINSTREE ROAD, STANWAY, COLCHESTER, CO3 0PZ
ODS code F81069
4.5 km
ROWHEDGE SURGERY
7 RECTORY ROAD, ROWHEDGE, COLCHESTER, CO5 7HP
ODS code F81141
4.6 km
Nearby transport
- 0.1 miles
Greyfriars
BCT · Colchester City Centre
- 0.1 miles
Coach Stop
BCT · Colchester City Centre
- 0.1 miles
Coach Stop
BCT · Colchester City Centre
- 0.1 miles
Greyfriars
BCT · Colchester City Centre
- 0.2 miles
The Surgery
BCT · Colchester
Relative deprivation
English Indices of Deprivation 2025 for Colchester 007C, 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
4 of 10
Overall England rank
10,833 of 33,755
- Income
- 4 of 10
- Employment
- 4 of 10
- Education and skills
- 7 of 10
- Health and disability
- 3 of 10
- Crime
- 1 of 10
- Housing and services
- 8 of 10
- Living environment
- 4 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
- 1
- 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
Schools
63 open schools are in scope, including 42 primary and 11 secondary schools. St Thomas More's Catholic Primary School, Colchester is the nearest published school at 330 m.
Counts describe active establishment records. They do not assess admissions, catchments or quality.
Recorded crime
6,126 published events cover 12 months, averaging 510.5 events per published month. The largest recorded category is Violence and sexual offences with 2,661 events.
The source publishes anonymised street-level events. These figures are not a measure of safety for an individual address.