- Company number
- 14178917
- Incorporated
- 17 Jun 20224 years trading
- Registered office
- Unit 19 1-13 Adler Street, London, E1 1EG
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings
Mariner Estate Limited is a 4-year-old private limited company registered in London, company number 14178917, one of 12,075 building contractors in London. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 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 down £100K (-479.1%) on the year before, to -£121K.
- Current assets of £9,672 against £131K owed within a year: 0.1 times cover.
- 2 employees on average, up from 1 the year before.
- Balance sheets on record for 3 years, 2023 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | -£121K | £9,672 | £131K | 2 | |
| 30 Jun 2024 | -£21K | £13K | £34K | 1 | |
| 30 Jun 2023 | £100 | £100 |
Where Mariner Estate Limited is registered
The registered office is in London (E1), in the Tower Hamlets local authority area, London. Show E1 1EG on a map.
Other trade companies in E1
- Safa Builds LtdElectricians
- Ribh LtdElectricians
- Tyres on Call LtdMechanics and garages
- Hrautosources LtdMotor traders
- Choiceworks LimitedInstallers
- E.M Construction London LtdBuilders
- Qubic Maintenance LtdSpecialist contractors
- Moovin Transport LtdMechanics and garages
Also registered at this address
12 other companies use the same registered office as Mariner Estate Limited.
- Al Husnain Trading LtdMotor traders
- Buildgap Group LimitedPlumbers and heating engineers
- Decode Operations LimitedFinishing trades
- Delton Properties LimitedProperty developers
- FJW Construct LtdFinishing trades
- Friends and Friends LtdBuilders
- Hundal & Sons Construction LtdFinishing trades
- Ignition Rentals LtdMotor traders
- Next Stone Slabs LtdFinishing trades
- Planning Gain Specialist LtdBuilders
- Pristine Cars LtdMotor traders
- Zenith Path LtdProperty developers
What happens if Mariner Estate 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 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 14178917
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 June 2022 (4 years ago)
- Registered office
- Unit 19 1-13 Adler Street, London, E1 1EG
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202) - Year end
- 30 June (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 13 June 2026
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in London
Other active building contractors registered in London.
- Mario & Fatmir Building Contractors Ltd2011
- Mario Building@82 Ltd2025
- Mario Delia Ltd2020
- Mario UK Construction Ltd2024
- Mario Willpower Ltd2023
- Mario&Alex Construction Ltd2021
- Marioconstructionco Ltd2021
- Mariopremiumltd Ltd2024
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Frequently asked questions
When are Mariner Estate Limited's accounts due?
Mariner Estate Limited's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is Mariner Estate Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Mariner Estate Limited still trading?
Mariner Estate 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 Mariner Estate Limited do?
Mariner Estate Limited is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202).
How old is Mariner Estate Limited?
Mariner Estate Limited was incorporated on 17 June 2022, 4 years ago.
What is the penalty if Mariner Estate 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 Mariner Estate 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.