- Companies
- Property developers
- London
- Mersey 1 Limited
Mersey 1 Limited
- Company number
- 12789417
- Incorporated
- 3 Aug 20206 years trading
- Registered office
- Ground Floor Threeways House, 40-44 Clipstone Street, London, W1W 5DW
- Nature of business
- Development of building projects
Mersey 1 Limited is a 6-year-old private limited company registered in London, company number 12789417, one of 14,100 property development companies in London. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 £315K (+1.8%) on the year before, to £18M.
- Net assets rose in 4 of 4 year-on-year comparisons on record.
- 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 Dec 2025 | £18M | £18M | £0 | 0 | |
| 31 Dec 2024 | £17M | £18M | £417K | 0 | |
| 31 Dec 2023 | £16M | £19M | £1.9M | 0 | |
| 31 Dec 2022 | £12M | £14M | £88K | 0 | |
| 31 Dec 2021 | £3.9M | £4.4M | £0 | 0 |
Public contracts won
Mersey 1 Limited has one public sector contract award on record (2021). Source: Contracts Finder and Find a Tender award notices. For all of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Network Rail Infrastructure Ltd | The redevelopment of part of London Liverpool Street Station. | Ceiling, not shown | 10 Dec 2021 |
Where Mersey 1 Limited is registered
The registered office is in London (W1W), in the Westminster local authority area, London. Show W1W 5DW on a map.
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Also registered at this address
5 other companies use the same registered office as Mersey 1 Limited.
- Camden Mixed Developments LtdProperty developers
- Sellar Design and Development LtdProperty developers
- Sellar Mersey DM LimitedProperty developers
- Sellar Mersey Investments LimitedProperty developers
- Sellar Paddington LimitedProperty developers
What happens if Mersey 1 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 12789417
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 August 2020 (6 years ago)
- Registered office
- Ground Floor Threeways House, 40-44 Clipstone Street, London, W1W 5DW
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 2 August 2026
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in London
Other active property development companies registered in London.
- Merton Building Services Limited2018
- Merveille Building Services Limited2014
- Merz Ltd2026
- Mesh Properties Limited1977
- Mesper Ltd2015
- Met Consulting & Services Ltd.2026
- Met Development London Ltd2014
- Meta Management Limited2024
All property development companies in London · All trades in London · Property developers across the UK
Frequently asked questions
When are Mersey 1 Limited's accounts due?
Mersey 1 Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Mersey 1 Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Mersey 1 Limited still trading?
Mersey 1 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 Mersey 1 Limited do?
Mersey 1 Limited is registered under Development of building projects (SIC 41100).
How old is Mersey 1 Limited?
Mersey 1 Limited was incorporated on 3 August 2020, 6 years ago.
Has Mersey 1 Limited won public sector contracts?
Yes. Mersey 1 Limited has one contract award from public bodies on Contracts Finder and Find a Tender, most recently from Network Rail Infrastructure Ltd.
What is the penalty if Mersey 1 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 Mersey 1 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.