- Companies
- Plumbers and heating engineers
- Hayle
- Mark Clay Plumbing & Heating Ltd
Mark Clay Plumbing & Heating Ltd
- Company number
- 13654550
- Incorporated
- 30 Sep 20215 years trading
- Registered office
- Blue Skies, Townshend, Hayle, TR27 6AF
- Nature of business
- Plumbing, heat and air-conditioning installation
Mark Clay Plumbing & Heating Ltd is a 5-year-old private limited company registered in Hayle, company number 13654550, one of 7 plumbing and heating companies in Hayle. Companies House shows its accounts as overdue: they were due on 31 December 2025.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Mark Clay Plumbing & Heating LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets down £26K (-97.2%) on the year before, to £742.
- Current assets of £19K against £19K owed within a year: 1.0 times cover.
- 2 employees on average, up from 1 the year before.
- Balance sheets on record for 3 years, 2022 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2024 | £742 | £485 | £19K | £19K | 2 |
| 31 Mar 2023 | £26K | £3,555 | £47K | £23K | 1 |
| 31 Mar 2022 | £10K | £5,409 | £19K | £22K | 1 |
Where Mark Clay Plumbing & Heating Ltd is registered
The registered office is in Hayle (TR27), in the Cornwall local authority area, South West. Show TR27 6AF on a map.
Other trade companies in TR27
- Zero Dry Time Cornwall LtdCleaning companies
- Crofty Groundworks LtdBuilders
- Ecl Developments LtdFinishing trades
- Wilde Spaces LtdLandscapers and gardeners
- M Young Contractors LtdBuilders
- Fenn Build LtdBuilders
- Elysian Renewables LtdPlumbers and heating engineers
- Cyclops Construction Management LimitedBuilders
What happens if Mark Clay Plumbing & Heating Ltd files late
If the accounts reach Companies House today, the late filing penalty is £1,500 (£3,000 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2026 to 31 Jan 2026 | £150 |
| 1 to 3 months late | 1 Feb 2026 to 31 Mar 2026 | £375 |
| 3 to 6 months late | 1 Apr 2026 to 30 Jun 2026 | £750 |
| More than 6 months late | From 1 Jul 2026 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2026 | £200 |
| 3 months late | 30 Jun 2026 | another £200 |
| 6 months late | 30 Sep 2026 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2027 | 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
- 13654550
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 September 2021 (5 years ago)
- Registered office
- Blue Skies, Townshend, Hayle, TR27 6AF
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2024
- Last confirmation statement
- 29 September 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 Hayle
Other active plumbing and heating companies registered in Hayle.
- SBC Plumbing and Heating Ltd2024
- Elysian Renewables Ltd2026
- Enviro Heating Ltd2020
- Hayle Heating Limited2015
- M. Blackmore Plumbing & Heating Ltd2023
- M.Hawkins Ltd2024
All plumbing and heating companies in Hayle · All trades in Hayle · Plumbers and heating engineers across the UK
Frequently asked questions
When are Mark Clay Plumbing & Heating Ltd's accounts due?
Mark Clay Plumbing & Heating Ltd's accounts were due at Companies House on 31 December 2025 and the register shows them as overdue.
When is Mark Clay Plumbing & Heating Ltd's CT600 due?
The CT600 for the period to 31 March 2025 is due at HMRC by 31 March 2026, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2026.
Is Mark Clay Plumbing & Heating Ltd still trading?
Mark Clay Plumbing & Heating Ltd is listed as active on the Companies House register (checked 13 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 Mark Clay Plumbing & Heating Ltd do?
Mark Clay Plumbing & Heating Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Mark Clay Plumbing & Heating Ltd?
Mark Clay Plumbing & Heating Ltd was incorporated on 30 September 2021, 5 years ago.
What is the penalty if Mark Clay Plumbing & Heating 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 Mark Clay Plumbing & Heating Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.