Colchester · CO1

EICR in CO1 (Colchester)? We'll point you the right way.

Covering Colchester, including Castle, Greenstead, Mile End. Find qualified electricians nearby.

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CO1 (Colchester) in a nutshell

CO1 covers Colchester, in Colchester. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.

Local tips for CO1

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Colchester council area

CO1 is in Colchester's area. Some councils run their own landlord licensing, so it's worth checking theirs.

Where's this from?postcodes.io (ONSPD) local authority
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Give your full postcode

CO1 stretches across Castle, Greenstead, Mile End and more, so give your full postcode, not just 'CO1', when you ask for quotes.

Where's this from?postcodes.io (ONSPD) wards
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Postcodes change here

Lots of old CO1 postcodes have been retired. If an old letter shows a different postcode, use your current one.

Where's this from?Doogal/ONSPD: 593 of 1,164 postcodes active
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New to EICRs? Here's what to expect, how to get ready and what it costs, in plain English. Read the quick guide →

England landlord rules: quick version

  • Every 5 years: an electrical inspection and test by a qualified person.
  • Within 28 days: give your tenants a copy of the report.
  • If asked: send it to the council within 7 days.

More detail on the Colchester page. Always double-check on GOV.UK.

Next door to CO1

CO2 · ColchesterCO3 · ColchesterCO4 · ColchesterCO5 · ColchesterCO7 · WivenhoeCO6 · Colchester

← Electrical safety (EICR) across Colchester · all areas

Frequently asked questions

Which areas does CO1 cover?

CO1 (Colchester) includes the wards of Castle, Greenstead, Mile End, New Town and Christ Church, Old Heath and The Hythe, Tiptree (ONS Postcode Directory via postcodes.io).

Which postcode districts are next to CO1?

Neighbouring districts include CO2 (Colchester), CO3 (Colchester), CO4 (Colchester), CO5 (Colchester), CO7 (Wivenhoe) (ONS Postcode Directory via Doogal). A pro covering CO1 may well cover these too, so it's worth asking.

How many homes are in CO1?

About 7,528 households and 15,333 residents at the 2011 Census, across 593 active postcodes (Doogal / ONS Postcode Directory).

Which council area is CO1 in?

CO1 sits in Colchester (postcodes.io). Parliamentary constituency: Colchester, Harwich and North Essex, Witham.

📊 The numbers behind this page
Postcode district
CO1 1
Areas covered
Colchester 2
Active postcodes
593 3
Households (2011 Census, via Doogal)
7,528 2
Population (2011 Census, via Doogal)
15,333 2
Electoral wards
Castle, Greenstead, Mile End, New Town and Christ Church, Old Heath and The Hythe, Tiptree 4
Parliamentary constituencies
Colchester, Harwich and North Essex, Witham 4
Local authority
Colchester 4
Households privately renting (Colchester built-up area)
25.7% 5
  1. ONS Postcode Directory
  2. Doogal
  3. Doogal / ONSPD
  4. postcodes.io
  5. ONS Census 2021

Made with open data. See where it all comes from. Updated 26 October 2026.