- Companies
- Machinery repair and installation
- Tunbridge Wells
- Grundon Marine Limited
Grundon Marine Limited
- Company number
- 04583155
- Incorporated
- 6 Nov 200223 years trading
- Registered office
- Lonsdale Gate, Lonsdale Gardens, Tunbridge Wells, Kent, TN1 1NU
- Nature of business
- Repair and maintenance of ships and boats
Grundon Marine Limited is a 23-year-old private limited company registered in Tunbridge Wells, company number 04583155, one of 23 machinery repair and installation companies in Tunbridge Wells. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 £15K on the year before, to £16K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £199K against £148K owed within a year: 1.3 times cover.
- 5 employees 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 |
|---|---|---|---|---|---|
| 30 Nov 2025 | £16K | £199K | £148K | 5 | |
| 30 Nov 2024 | £429 | £6,156 | £92K | £60K | 5 |
| 30 Nov 2023 | £4,779 | £195 | £242K | £221K | 5 |
| 30 Nov 2022 | -£3,669 | £8,081 | £81K | £61K | 5 |
| 30 Nov 2021 | £39K | £29K | £162K | £91K | 5 |
| 30 Nov 2020 | £65K | £89K | £148K | £89K | 6 |
| 30 Nov 2019 | £116K | £1,038 | £217K | £109K | 6 |
| 30 Nov 2018 | £133K | £45K | £285K | £160K | 6 |
| 30 Nov 2017 | £42K | £8,480 | £75K | £41K | 7 |
| 30 Nov 2016 | £40K | £35K | £95K | £65K |
Where Grundon Marine Limited is registered
The registered office is in Tunbridge Wells (TN1), in the Tunbridge Wells local authority area, South East. Show TN1 1NU on a map.
Other trade companies in TN1
- Externalworks4U LtdGlaziers
- BMH Development LimitedProperty developers
- Taleb Taleb LimitedPlumbers and heating engineers
- Contour Building & Asset Management LimitedSpecialist contractors
- Shelby Homes Group LtdBuilders
- Contour Contracting LimitedProperty developers
- L & M Decoration Specialists LtdPainters and decorators
- Contour Facilities Management LimitedFacilities management
Also registered at this address
8 other companies use the same registered office as Grundon Marine Limited.
- Impeccable Plumbers LtdPlumbers and heating engineers
- JGL Brickwork LtdBuilders
- JNL Total Building Solutions LtdBuilders
- L R Shelby LimitedProperty developers
- Patrick Mills Interiors LimitedPainters and decorators
- Shelby Homes Group LtdBuilders
- TJ Property Solutions LtdFinishing trades
- Voltbuild Solutions UK LtdInstallers
What happens if Grundon Marine 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 31 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 04583155
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 November 2002 (23 years ago)
- Registered office
- Lonsdale Gate, Lonsdale Gardens, Tunbridge Wells, Kent, TN1 1NU
- Nature of business
- Repair and maintenance of ships and boats (SIC 33150)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 2 November 2025
- Charges (mortgages)
- 0 outstanding of 1 registered
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 Tunbridge Wells
Other active machinery repair and installation companies registered in Tunbridge Wells.
- Guardian Safes Limited1947
- Harrington Heating and Plumbing Ltd2014
- Imptech Limited2020
- Imptech Press Engineering Ltd2009
- Innovate Lifts Ltd2016
- Laylee Ltd2026
- Scuffs and Scratches Limited2005
- Smarthome Electrical Sevenoaks Limited2021
All machinery repair and installation companies in Tunbridge Wells · All trades in Tunbridge Wells · Machinery repair and installation across the UK
Frequently asked questions
When are Grundon Marine Limited's accounts due?
Grundon Marine Limited's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is Grundon Marine Limited's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Grundon Marine Limited still trading?
Grundon Marine 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 Grundon Marine Limited do?
Grundon Marine Limited is registered under Repair and maintenance of ships and boats (SIC 33150).
How old is Grundon Marine Limited?
Grundon Marine Limited was incorporated on 6 November 2002, 23 years ago.
What is the penalty if Grundon Marine 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 Grundon Marine 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.