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- LSK Mechanical Ltd
Company profile · Plumbers and heating engineers
LSK Mechanical Ltd
LSK Mechanical Ltd is a 2-year-old private limited company registered in London, company number 15893237, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2026
From the balance sheet at 31 March 2026, as filed at Companies House.
LSK Mechanical Ltd over the years
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 up £8,931 (+893.1%) on the year before, to £9,931.
- Current assets of £37K against £25K owed within a year: 1.4 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 2 years, 2025 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £9,931 | £37K | £25K | 1 | |
| 31 Aug 2025 | £1,000 | £1,000 | 1 |
Where LSK Mechanical Ltd is registered
The registered office is in London (E17), in the Waltham Forest local authority area, London. Show E17 4NL on a map.
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What happens if LSK Mechanical 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 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 15893237
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 August 2024 (2 years ago)
- Registered office
- 73 Marten Road, London, E17 4NL
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 11 August 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.
- LSS Air Conditioning Ltd2026
- Luisen Ltd2026
- Luka Plumbing Services Ltd2026
- Lukes Plumbing Services Ltd2023
- Luna Plumbing Ltd2026
- Lunar Wat£R Ltd2025
- Lushi Plumbing and Heating Ltd2026
- LVB Plumbing Ltd2026
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are LSK Mechanical Ltd's accounts due?
LSK Mechanical Ltd's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is LSK Mechanical Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is LSK Mechanical Ltd still trading?
LSK Mechanical 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 LSK Mechanical Ltd do?
LSK Mechanical Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is LSK Mechanical Ltd?
LSK Mechanical Ltd was incorporated on 12 August 2024, 2 years ago.
What is the penalty if LSK Mechanical 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 LSK Mechanical 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.