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Companies House · Colchester

UK companies in Colchester

Colchester is a historic Essex city with a mix of construction, retail, health and professional firms. 15,646 active companies have their registered office here, and 1,907 new ones were set up in the last twelve months.

At a glance

Key facts

  • 15,646 active companies are registered to a Colchester post town on the Companies House snapshot of August 2026.
  • 1,907 new companies started here in the last twelve months, about 159 a month, and 169 in August 2026.
  • The most common code is Other letting and operating of own or leased real estate (SIC 68209), with 782 companies.
  • The busiest postcode districts are CO4, CO3, CO7, CO1.
Measured

New companies in Colchester

1,907 new companies were set up with a Colchester registered office in the last twelve full months, about 159 a month. 169 of them were set up in August 2026. That sits on top of 15,646 active companies already registered here.

Sept 25: 146Oct 25: 181Nov 25: 152Dec 25: 120Jan 26: 163Feb 26: 167Mar 26: 179Apr 26: 152May 26: 160Jun 26: 142Jul 26: 176Aug 26: 169
Sept 25 to Aug 26. Companies still on the register, counted from the Companies House snapshot.

What the new ones do: Retail sale via mail order houses or via the internet leads, with 98 new companies in the year.

  1. 47910Retail sale via mail order houses or via the internet98
  2. 70229Other management consultancy activities (not financial)98
  3. 68100Buying and selling of own real estate93
  4. 68209Other letting and operating of own or leased real estate69
  5. 62012Business and domestic software development63
For agencies and suppliers

Selling to new Colchester companies

A company in its first months is still choosing who it works with. Reaching it then, with a short email that names what it has just started, is often the easiest time to win them as a client.

  • Marketing agenciesA new company needs a website, a logo and its first customers, usually before it has picked anyone to help.
  • AccountantsEvery new company owes a first set of accounts and a confirmation statement, and many have no accountant yet.
  • IT and software firmsEmail, devices and security get set up in the first months, and the choices made then tend to stick.
  • Insurance brokersEmployers' liability, professional indemnity and van cover are bought early, often in a hurry.
  • RecruitersThe first hires come quickly once a new company wins work.

Leadistry reads the new Colchester registrations every morning, keeps the ones with a working website and a real email, and writes the first email for you to approve. The first 25 leads are free.

Get new Colchester companies as leads
Measured

The most registered SIC codes in Colchester

Counting active companies whose registered office is a Colchester post town, these are the codes that come up most often on the August 2026 Companies House snapshot. Other letting and operating of own or leased real estate leads with 782 companies. It is worth reading against the sectors below: the authored view is what Colchester is known for, this is what its companies actually filed.

  1. 68209Other letting and operating of own or leased real estate782
  2. 82990Other business support service activities n.e.c.677
  3. 98000Residents property management645
  4. 68100Buying and selling of own real estate638
  5. 70229Other management consultancy activities (not financial)636
  6. 41100Development of building projects404
  7. 62020IT consultancy activities331
  8. 64209Activities of other holding companies n.e.c.315

Pick a code, then narrow by postcode and date. Every company you pull carries a working website and a real email, and we never charge for the ones we cannot complete.

Why do these counts add up to more than the total?

A company may register up to four SIC codes and these counts include every position, so a business filed under two of them appears twice.

Where the volume sits

Dominant sectors in Colchester

SIC 68209, Other letting and operating of own or leased real estateView SIC 68209→
782 active companies in Colchester
SIC 82990, Other business support service activities n.e.c.View SIC 82990→
677 active companies in Colchester
SIC 98000, Residents property managementView SIC 98000→
645 active companies in Colchester
SIC 68100, Buying and selling of own real estateView SIC 68100→
638 active companies in Colchester
SIC 70229, Other management consultancy activities (not financial)View SIC 70229→
636 active companies in Colchester
Search recipe

Postcode filter

To target Colchester on Leadistry, set the postcode prefix filter to:

CO4, CO3, CO7, CO1, CO2, CO6

The search returns companies with a registered office in any of these postcode areas. Add a SIC code filter from the table above to narrow by sector.

Answers

About Colchester on Companies House

How many companies are registered in Colchester?

15,646 active companies have a registered office in Colchester, counted from the Companies House snapshot of August 2026. Dissolved companies are not counted.

How many new businesses start in Colchester each month?

1,907 new companies were set up in Colchester in the last twelve full months, about 159 a month. 169 were set up in August 2026.

What do new Colchester companies do?

The most common code among companies set up in Colchester in the last year is Retail sale via mail order houses or via the internet (SIC 47910), with 98 of them. Next come Other management consultancy activities (not financial) and Buying and selling of own real estate.

How do I reach new Colchester companies before anyone else?

Set a Leadistry agent to the Colchester postcode districts (CO4, CO3, CO7) and the trades you sell to. Each morning it finds the new companies that match, checks each one has a working website and a real email, and writes the first email for you to read and approve.

Nearby and related cities: Norwich · Cambridge · Peterborough · Chelmsford · Stoke-on-Trent · Aberdeen · Hull · Swansea · Every UK city

Companies House · Colchester

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