- Companies
- Finishing trades
- Southampton
- Mariner Interiors Ltd
Mariner Interiors Ltd
- Company number
- 09701095
- Incorporated
- 24 Jul 201511 years trading
- Registered office
- 237 Manor Farm Road, Southampton, SO18 1NY
- Nature of business
- Other building completion and finishing
Mariner Interiors Ltd is a 11-year-old private limited company registered in Southampton, company number 09701095, one of 181 building finishing companies in Southampton. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 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 £241K (+53.7%) on the year before, to £689K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £827K against £222K owed within a year: 3.7 times cover.
- 6 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 |
|---|---|---|---|---|---|
| 31 Jul 2025 | £689K | £288K | £827K | £222K | 6 |
| 31 Jul 2024 | £449K | £323K | £568K | £188K | 6 |
| 31 Jul 2023 | £271K | £316K | £407K | £85K | 3 |
| 31 Jul 2022 | £155K | £157K | £278K | £103K | 2 |
| 31 Jul 2021 | £31K | £71K | £29K | 2 | |
| 31 Jul 2020 | £31K | £126K | £76K | 2 | |
| 31 Jul 2019 | £31K | £105K | £81K | ||
| 31 Jul 2018 | £258 | £61K | £70K | ||
| 31 Jul 2017 | £22 | £13K | £25K | ||
| 31 Jul 2016 | £29 | £16K | £18K |
Where Mariner Interiors Ltd is registered
The registered office is in Southampton (SO18), in the Southampton local authority area, South East. Show SO18 1NY on a map.
Other trade companies in SO18
- Nationwide Steelfixing LtdBuilders
- Terraline LimitedSpecialist contractors
- Omni Group Holdings LtdSpecialist contractors
- Zammit Property Developments LtdProperty developers
- Shotton Marine LtdMachinery repair and installation
- Amiri Mobile Mechanic LtdMechanics and garages
- Roofing Building & Maintenance LtdSpecialist contractors
- The Tidy Life LtdCleaning companies
Also registered at this address
15 other companies use the same registered office as Mariner Interiors Ltd.
- A. Medway LimitedBuilders
- Car Training LtdMotor traders
- Central Point Services LimitedBuilders
- GK International Marine LtdElectricians
- Interior Construction & Installations LimitedJoiners and carpenters
- Laws Elevation LtdSpecialist contractors
- Mill Developments LimitedSpecialist contractors
- Pinfolds Mechanical LtdPlumbers and heating engineers
- PJ McLean Tiling LtdFloor and wall tilers
- RWC Build Better LtdBuilders
- Splash Bro's Valeting & Detailing LtdMechanics and garages
- Stag Carpentry and Contractors LtdBuilders
- Top Spec Brickwork LimitedBuilders
- Topspec Builders LimitedBuilders
- Ventura Installations LtdJoiners and carpenters
What happens if Mariner Interiors 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 30 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 09701095
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 24 July 2015 (11 years ago)
- Registered office
- 237 Manor Farm Road, Southampton, SO18 1NY
- Nature of business
- Other building completion and finishing (SIC 43390)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 23 July 2026
Filing notes for building finishing companies
Finishing trade companies cover a wide range of work. Most are micro-entities with simple accounts and a straightforward CT600.
Similar companies in Southampton
Other active building finishing companies registered in Southampton.
- McDonnell Brothers Property Management Limited1995
- MCDS Commercial Ltd2025
- McIntyre Mosaics Limited2019
- MDS Home Improvements Limited2019
- Mehran Renovation Services Limited2023
- Midanbury Maintenance Ltd2024
- Mistrz Limited2017
- Mitchells Construction Ltd2023
All building finishing companies in Southampton · All trades in Southampton · Finishing trades across the UK
Frequently asked questions
When are Mariner Interiors Ltd's accounts due?
Mariner Interiors Ltd's next accounts are due at Companies House by 30 April 2027 (in 199 days), covering the period to 31 July 2026.
When is Mariner Interiors Ltd's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is Mariner Interiors Ltd still trading?
Mariner Interiors 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 Mariner Interiors Ltd do?
Mariner Interiors Ltd is registered under Other building completion and finishing (SIC 43390).
How old is Mariner Interiors Ltd?
Mariner Interiors Ltd was incorporated on 24 July 2015, 11 years ago.
What is the penalty if Mariner Interiors 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 Mariner Interiors 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.