- Companies
- Civil engineering
- Rochester
- Marine and Civil Diving Services Ltd
Marine and Civil Diving Services Ltd
- Company number
- 12386651
- Incorporated
- 6 Jan 20206 years trading
- Registered office
- GPS Marine House, Upnor Road, Rochester, Kent, ME2 4UY
- Nature of business
- Construction of other civil engineering projects n.e.c.
Marine and Civil Diving Services Ltd is a 6-year-old private limited company registered in Rochester, company number 12386651, one of 72 civil engineering contractors in Rochester. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £146K (+91.4%) on the year before, to £305K.
- Net assets rose in 4 of 4 year-on-year comparisons on record.
- Current assets of £679K against £466K owed within a year: 1.5 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £305K | £121K | £679K | £466K | 0 |
| 31 Jan 2024 | £159K | £122K | £281K | £166K | 0 |
| 31 Jan 2023 | £35K | £24K | £88K | £67K | 1 |
| 31 Jan 2022 | £1,309 | £2,597 | £77K | £93K | 1 |
| 31 Jan 2021 | -£15K | £37K | £59K | £89K | 2 |
Where Marine and Civil Diving Services Ltd is registered
The registered office is in Rochester (ME2), in the Medway local authority area, South East. Show ME2 4UY on a map.
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What happens if Marine and Civil Diving Services 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 12386651
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 January 2020 (6 years ago)
- Registered office
- GPS Marine House, Upnor Road, Rochester, Kent, ME2 4UY
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 5 January 2026
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Rochester
Other active civil engineering contractors registered in Rochester.
- Mellos Civil Engineering Ltd2018
- Micks Construction Limited2021
- MJB Project Solutions Ltd2025
- MJB Utilities Ltd2023
- Opravale Ltd2021
- Phoenix Civils Solutions Limited2023
- R & S Ince Tarmacing Ltd2003
- R.W Install Ltd2018
All civil engineering contractors in Rochester · All trades in Rochester · Civil engineering across the UK
Frequently asked questions
When are Marine and Civil Diving Services Ltd's accounts due?
Marine and Civil Diving Services Ltd's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Marine and Civil Diving Services Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Marine and Civil Diving Services Ltd still trading?
Marine and Civil Diving Services 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 Marine and Civil Diving Services Ltd do?
Marine and Civil Diving Services Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Marine and Civil Diving Services Ltd?
Marine and Civil Diving Services Ltd was incorporated on 6 January 2020, 6 years ago.
What is the penalty if Marine and Civil Diving Services 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 Marine and Civil Diving Services 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.