- Companies
- Specialist contractors
- London
- Maclean Marine Engineering Limited
Maclean Marine Engineering Limited
- Company number
- 09043513
- Incorporated
- 16 May 201412 years trading
- Registered office
- 41 Paradise Walk, Chelsea, London, SW3 4JL
- Nature of business
- Other specialised construction activities n.e.c.
Maclean Marine Engineering Limited is a 12-year-old private limited company registered in London, company number 09043513, one of 4,318 specialist construction companies in London.
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 £70K (-1.5%) on the year before, to £4.7M.
- Net assets rose in 3 of 6 year-on-year comparisons on record.
- Current assets of £5.5M against £1.2M owed within a year: 4.5 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 7 years, 2018 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2024 | £4.7M | £5.5M | £1.2M | 0 | |
| 30 Jun 2023 | £4.8M | £5.1M | £762K | 0 | |
| 30 Jun 2022 | £4.8M | £5.1M | £762K | 0 | |
| 30 Jun 2021 | £4.2M | £4.9M | £2.6M | 0 | |
| 30 Jun 2020 | £4.1M | £4.8M | £2.6M | 0 | |
| 30 Jun 2019 | £4M | £4.7M | £2.6M | 0 | |
| 30 Jun 2018 | £4.1M | £4.5M | £2.3M | 3 |
Where Maclean Marine Engineering Limited is registered
The registered office is in London (SW3), in the Kensington and Chelsea local authority area, London. Show SW3 4JL on a map.
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Also registered at this address
2 other companies use the same registered office as Maclean Marine Engineering Limited.
- Albyns LimitedBuilders
- CNDR 1 LimitedBuilders
What happens if Maclean Marine Engineering 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 30 September 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2026 to 31 Oct 2026 | £150 |
| 1 to 3 months late | 1 Nov 2026 to 31 Dec 2026 | £375 |
| 3 to 6 months late | 1 Jan 2027 to 31 Mar 2027 | £750 |
| More than 6 months late | From 1 Apr 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2027 | £200 |
| 3 months late | 31 Mar 2027 | another £200 |
| 6 months late | 30 Jun 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 09043513
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 May 2014 (12 years ago)
- Registered office
- 41 Paradise Walk, Chelsea, London, SW3 4JL
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 June 2024
- Last confirmation statement
- 12 September 2025
- Charges (mortgages)
- 0 outstanding of 3 registered
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in London
Other active specialist construction companies registered in London.
- Made From Scratch Ltd2011
- Made Workshop Ltd.2013
- Madrail UK Limited2015
- Mads Watson Limited2025
- Mae Building Group Ltd2020
- Mag Forest Limited2026
- Magaprime Ltd2025
- Magik Developments Ltd2022
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Maclean Marine Engineering Limited's accounts due?
The register showed Maclean Marine Engineering Limited's accounts as due on 30 September 2026. That date has passed; the Companies House register shows whether they have been filed since.
When is Maclean Marine Engineering 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 30 June 2025, due by 30 June 2026, and one for the period to 31 December 2025, due by 31 December 2026. Corporation tax is payable 9 months and 1 day after the end of each.
Is Maclean Marine Engineering Limited still trading?
Maclean Marine Engineering 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 Maclean Marine Engineering Limited do?
Maclean Marine Engineering Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Maclean Marine Engineering Limited?
Maclean Marine Engineering Limited was incorporated on 16 May 2014, 12 years ago.
What is the penalty if Maclean Marine Engineering 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 Maclean Marine Engineering Limited 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.