- Companies
- Plumbers and heating engineers
- Kernowplumb Ltd
Kernowplumb Ltd
- Company number
- 17441338
- Incorporated
- 5 Sep 2026
- Registered office
- Unit 5M, Lanvale Estate, ST Columb Industrial Estate, St Columb, Cornwall, TR9 6SF
- Nature of business
- Plumbing, heat and air-conditioning installation
Kernowplumb Ltd is a newly incorporated private limited company registered in St Columb, company number 17441338, one of the UK's plumbing and heating companies. Its next accounts are due at Companies House on 31 May 2028, and the CT600 for the period to 31 August 2027 is due at HMRC on 31 August 2028.
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.
Is this your company?
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Where Kernowplumb Ltd is registered
The registered office is in St Columb (TR9), in the Cornwall local authority area, South West. Show TR9 6SF on a map.
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- Blake & Cook LtdFinishing trades
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What happens if Kernowplumb Ltd 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 31 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2028 to 30 Jun 2028 | £150 |
| 1 to 3 months late | 1 Jul 2028 to 31 Aug 2028 | £375 |
| 3 to 6 months late | 1 Sep 2028 to 30 Nov 2028 | £750 |
| More than 6 months late | From 1 Dec 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 2029 | another 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
- 17441338
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 September 2026
- Registered office
- Unit 5M, Lanvale Estate, ST Columb Industrial Estate, St Columb, Cornwall, TR9 6SF
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
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
Other active plumbing and heating companies.
Frequently asked questions
When are Kernowplumb Ltd's accounts due?
Kernowplumb Ltd's next accounts are due at Companies House by 31 May 2028 (in 596 days), covering the period to 31 August 2027.
When is Kernowplumb Ltd's CT600 due?
The CT600 for the period to 31 August 2027 is due at HMRC by 31 August 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2028.
Is Kernowplumb Ltd still trading?
Kernowplumb Ltd 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 Kernowplumb Ltd do?
Kernowplumb Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Kernowplumb Ltd?
Kernowplumb Ltd was incorporated on 5 September 2026, less than a year ago.
What is the penalty if Kernowplumb Ltd 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 Kernowplumb Ltd on Companies House for filed documents, officers and the full history.
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.