- Companies
- Machinery repair and installation
- St Austell
- DH Marine Ltd
DH Marine Ltd
- Company number
- 16646979
- Incorporated
- 13 Aug 20251 year trading
- Registered office
- 186 Larcombe Road, St Austell, PL25 3EZ
- Nature of business
- Repair and maintenance of ships and boats; Construction of other civil engineering projects n.e.c.; Temporary employment agency activities
DH Marine Ltd is a 1-year-old private limited company registered in St Austell, company number 16646979, one of 12 machinery repair and installation companies in St Austell. Its next accounts are due at Companies House on 13 May 2027, and its first CT600 is due at HMRC on 12 August 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
Is this your company?
File the first accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for DH Marine LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
Where DH Marine Ltd is registered
The registered office is in St Austell (PL25), in the Cornwall local authority area, South West. Show PL25 3EZ on a map.
Other trade companies in PL25
- Platinum Window Care LimitedCleaning companies
- Aspire Land Property LimitedProperty developers
- Kernow Property Portfolio LtdProperty developers
- Bould Landscapes LimitedLandscapers and gardeners
- Rustic Homes LtdProperty developers
- Rustic Property LtdProperty developers
- Balustrade Solutions Cornwall LimitedInstallers
- R&L Developments Group LtdBuilders
What happens if DH Marine 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 13 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 14 May 2027 to 13 Jun 2027 | £150 |
| 1 to 3 months late | 14 Jun 2027 to 13 Aug 2027 | £375 |
| 3 to 6 months late | 14 Aug 2027 to 13 Nov 2027 | £750 |
| More than 6 months late | From 14 Nov 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
- 16646979
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 August 2025 (1 year ago)
- Registered office
- 186 Larcombe Road, St Austell, PL25 3EZ
- Nature of business
- Repair and maintenance of ships and boats (SIC 33150)
Construction of other civil engineering projects n.e.c. (SIC 42990)
Temporary employment agency activities (SIC 78200) - Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 5 September 2026
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 St Austell
Other active machinery repair and installation companies registered in St Austell.
- Ebron Tech Ltd2019
- F & K Electrical & Refrigeration Limited2004
- Goonvean Electronics Limited1982
- Mills Engines & Driver Ltd2026
- Penzance Dry Dock (2009) Limited2009
- ST. Austell Garden Machinery Limited2003
- The Surfboard Surgery Limited2025
- Ac Fabrication Cornwall Ltd2024
All machinery repair and installation companies in St Austell · All trades in St Austell · Machinery repair and installation across the UK
Frequently asked questions
When are DH Marine Ltd's accounts due?
DH Marine Ltd's next accounts are due at Companies House by 13 May 2027 (in 212 days), covering the period to 31 August 2026.
When is DH Marine 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 12 August 2026, due by 12 August 2027, and one for the period to 31 August 2026, due by 31 August 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is DH Marine Ltd still trading?
DH Marine 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 DH Marine Ltd do?
DH Marine Ltd is registered under Repair and maintenance of ships and boats (SIC 33150); Construction of other civil engineering projects n.e.c. (SIC 42990); Temporary employment agency activities (SIC 78200).
How old is DH Marine Ltd?
DH Marine Ltd was incorporated on 13 August 2025, 1 year ago.
What is the penalty if DH Marine 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 DH Marine 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.