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  1. Companies
  2. Plumbers and heating engineers
  3. London
  4. Cornish Plumber Limited

Cornish Plumber Limited

ActiveNo accounts filed yet accountsPlumbers and heating engineersLondon
Company number
16305513
Incorporated
10 Mar 20251 year trading
Registered office
Southgate Office Village 286-A Chase Road, Block E, London, Greater London, N14 6HF
Nature of business
Plumbing, heat and air-conditioning installation
Accounts due in
58 days
10 Dec 2026
From the Companies House register, 1 Oct 2026

Cornish Plumber Limited is a 1-year-old private limited company registered in London, company number 16305513, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 10 December 2026, and its first CT600 is due at HMRC on 9 March 2027.

Key dates

This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.

Accounts due
10 Dec 2026
in 58 days
For the period to 31 Mar 2026
CT600 due (first of two)
9 Mar 2027
in 147 days
Period 10 Mar 2025 to 9 Mar 2026
CT600 due (second of two)
31 Mar 2027
in 169 days
Period 10 Mar 2026 to 31 Mar 2026
Corporation tax payment
1 Jan 2027
in 80 days
9 months and 1 day after the period end
Confirmation statement
23 Mar 2027
in 161 days
Last made up to 9 Mar 2026

Is this your company?

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Where Cornish Plumber Limited is registered

Cornish Plumber Limited's registered office on a map of the UK

The registered office is in London (N14), in the Enfield local authority area, London. Show N14 6HF on a map.

Other trade companies in N14

Also registered at this address

23 other companies use the same registered office as Cornish Plumber Limited.

What happens if Cornish Plumber Limited files late

Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 10 December 2026.

Companies HouseAccounts deliveredPenalty
Up to 1 month late11 Dec 2026 to 10 Jan 2027£150
1 to 3 months late11 Jan 2027 to 10 Mar 2027£375
3 to 6 months late11 Mar 2027 to 10 Jun 2027£750
More than 6 months lateFrom 11 Jun 2027£1,500

Penalties double if the accounts were also late the year before.

HMRC (CT600)FromPenalty
1 day late1 Apr 2027£200
3 months late30 Jun 2027another £200
6 months late30 Sep 2027HMRC estimates the tax and adds 10% of the unpaid tax
12 months late31 Mar 2028another 10% of any unpaid tax

For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.

Company details

As held on the Companies House register.

Company number
16305513
Status
Active
Company type
Private limited company
Incorporated
10 March 2025 (1 year ago)
Registered office
Southgate Office Village 286-A Chase Road, Block E, London, Greater London, N14 6HF
Nature of business
Plumbing, heat and air-conditioning installation (SIC 43220)
Year end
31 March (accounting reference date)
Accounts type
No accounts filed yet
Last confirmation statement
9 March 2026

Filing notes for plumbing and heating companies

Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.

Similar companies in London

Other active plumbing and heating companies registered in London.

All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK

Frequently asked questions

When are Cornish Plumber Limited's accounts due?

Cornish Plumber Limited's next accounts are due at Companies House by 10 December 2026 (in 58 days), covering the period to 31 March 2026.

When is Cornish Plumber Limited's CT600 due?

The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 9 March 2026, due by 9 March 2027, and one for the period to 31 March 2026, due by 31 March 2027. Corporation tax is payable 9 months and 1 day after the end of each.

Is Cornish Plumber Limited still trading?

Cornish Plumber Limited is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.

What does Cornish Plumber Limited do?

Cornish Plumber Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).

How old is Cornish Plumber Limited?

Cornish Plumber Limited was incorporated on 10 March 2025, 1 year ago.

What is the penalty if Cornish Plumber Limited files its accounts late?

Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.

Official records

View Cornish Plumber Limited on Companies House for filed documents, officers and the full history.

Report an error on this page

Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.

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