- Companies
- Plumbers and heating engineers
- London
- Clarkin Contracting Ltd
Clarkin Contracting Ltd
- Company number
- 15378656
- Incorporated
- 31 Dec 20232 years trading
- Registered office
- Office 3 Piano House, 9 Brighton Terrace, London, SW9 8DJ
- Nature of business
- Plumbing, heat and air-conditioning installation
Clarkin Contracting Ltd is a 2-year-old private limited company registered in London, company number 15378656, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 31 December 2026, and its first CT600 is due at HMRC on 31 December 2026.
Key dates
Worked out from the year end and filing history on the Companies House register.
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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 £124 (-11.3%) on the year before, to £975.
- Current assets of £8,392 against £7,447 owed within a year: 1.1 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £975 | £8,392 | £7,447 | 1 | |
| 31 Dec 2024 | £1,099 | £7,562 | £6,463 | 1 |
Where Clarkin Contracting Ltd is registered
The registered office is in London (SW9), in the Lambeth local authority area, London. Show SW9 8DJ on a map.
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Also registered at this address
4 other companies use the same registered office as Clarkin Contracting Ltd.
- B.J Bunting LtdCivil engineering
- Kimmo-PCM Consultancy LtdCivil engineering
- Scarlett Plumbing & Heating LtdPlumbers and heating engineers
- Schulz Civil Consulting LtdCivil engineering
What happens if Clarkin Contracting 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2028 | 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
- 15378656
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 31 December 2023 (2 years ago)
- Registered office
- Office 3 Piano House, 9 Brighton Terrace, London, SW9 8DJ
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2024
- Last confirmation statement
- 30 December 2025
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.
- CLC Maintenance Group Ltd2017
- Clean Filtration Limited2025
- Cleanline Engineering Co. Limited1981
- Clear Flame Plumbing and Heating Ltd2024
- Clear Flow Solutions Ltd2025
- Cleopatra Plumbing & Heating Ltd2012
- Clerkenwell Construction Ltd2024
- Climacraft Ltd2026
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Clarkin Contracting Ltd's accounts due?
Clarkin Contracting Ltd's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Clarkin Contracting Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 31 December 2025, due by 31 December 2026, 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 Clarkin Contracting Ltd still trading?
Clarkin Contracting 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 Clarkin Contracting Ltd do?
Clarkin Contracting Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Clarkin Contracting Ltd?
Clarkin Contracting Ltd was incorporated on 31 December 2023, 2 years ago.
What is the penalty if Clarkin Contracting 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 Clarkin Contracting 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.