- Companies
- Machinery repair and installation
- Penzance
- M J Marine Group Ltd
M J Marine Group Ltd
- Company number
- 07514417
- Incorporated
- 2 Feb 201115 years trading
- Registered office
- 15 Alverton Street, Penzance, Cornwall, TR18 2QP
- Nature of business
- Repair and maintenance of ships and boats
M J Marine Group Ltd is a 15-year-old private limited company registered in Penzance, company number 07514417, one of 7 machinery repair and installation companies in Penzance. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 2027.
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 up £16K (+71.4%) on the year before, to £37K.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- 1 employee on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £37K | £3,028 | £37K | 1 | |
| 31 Aug 2024 | £22K | £130 | £25K | £3,660 | 1 |
| 31 Aug 2023 | £12K | £15K | £3,560 | 1 | |
| 31 Aug 2022 | -£3,359 | £3,460 | 1 | ||
| 31 Aug 2021 | -£3,259 | £3,360 | 1 | ||
| 31 Aug 2020 | -£3,159 | £3,260 | 1 | ||
| 31 Aug 2019 | -£3,059 | £3,160 | 1 | ||
| 31 Aug 2018 | -£2,959 | £3,060 | 1 | ||
| 31 Aug 2017 | -£2,859 | £2,960 | 1 | ||
| 31 Aug 2016 | -£2,459 | £2,560 |
Who runs and owns M J Marine Group Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| M*** J*** | Director | Feb 2011 |
1 former officer
| Name | Role | Appointed | Left |
|---|---|---|---|
| Y*** S*** | Director | Feb 2011 | May 2011 |
Person with significant control
Where M J Marine Group Ltd is registered
The registered office is in Penzance (TR18), in the Cornwall local authority area, South West. Show TR18 2QP on a map.
Other trade companies in TR18
- Elegant Cleaning Solutions LtdCleaning companies
- DS Complete Projects LtdBuilders
- Edmond Leah Roofing LtdRoofers
- Richards Property Solutions (SW) LtdSpecialist contractors
- A Hampton SW LimitedBuilders
- M.4.Me LtdMechanics and garages
- Warren Stevens Decorators LtdPainters and decorators
- Bosuns Property LtdProperty developers
Also registered at this address
11 other companies use the same registered office as M J Marine Group Ltd.
- A T Architecture LimitedProperty developers
- Ayrsher Homes LimitedBuilders
- Braddon Building & Roofing LimitedProperty developers
- Cottage Developments (South West) LimitedProperty developers
- Cottage Developments (SW) LimitedProperty developers
- Piran Plumbing LtdPlumbers and heating engineers
- South West Heating Solutions LimitedPlumbers and heating engineers
- Sullivan's (SW) LimitedProperty developers
- Thomas Homes ( Cornwall ) LimitedBuilders
- TJ Cornwall LimitedProperty developers
- West Cornwall Construction Management LimitedProperty developers
What happens if M J Marine Group 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 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 07514417
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 February 2011 (15 years ago)
- Registered office
- 15 Alverton Street, Penzance, Cornwall, TR18 2QP
- Nature of business
- Repair and maintenance of ships and boats (SIC 33150)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 2 February 2026
- Previous names
- Astrospray Ltd (until 16 Jun 2011)
Filing notes for machinery repair and installation companies
Machinery repair and installation companies often carry parts stock and specialist tools, and many work on contracts that span the year end.
Similar companies in Penzance
Other active machinery repair and installation companies registered in Penzance.
- Penwith Marine Services Limited2016
- Sandy Cove Boatyard Ltd2020
- South West Marine Ltd2022
- A2 Rigging Limited1996
- J.W.Pearce Agricultural Services Limited2013
- LT Painters Ltd2024
All machinery repair and installation companies in Penzance · All trades in Penzance · Machinery repair and installation across the UK
Frequently asked questions
When are M J Marine Group Ltd's accounts due?
M J Marine Group Ltd's next accounts are due at Companies House by 31 May 2027 (in 229 days), covering the period to 31 August 2026.
When is M J Marine Group Ltd's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is M J Marine Group Ltd still trading?
M J Marine Group 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 M J Marine Group Ltd do?
M J Marine Group Ltd is registered under Repair and maintenance of ships and boats (SIC 33150).
How old is M J Marine Group Ltd?
M J Marine Group Ltd was incorporated on 2 February 2011, 15 years ago.
Who runs M J Marine Group Ltd?
M J Marine Group Ltd has 1 active director, the longest-serving appointed in Feb 2011. Their names and service addresses are on the Companies House register.
Who owns M J Marine Group Ltd?
One person or company has significant control of M J Marine Group Ltd: an individual (owns 75% or more of the shares).
What is the penalty if M J Marine Group 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 M J Marine Group 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.