- Companies
- Civil engineering
- London
- 1 Mo Limited
1 Mo Limited
- Company number
- 12593926
- Incorporated
- 11 May 20206 years trading
- Registered office
- 111 Orton House, Plough Lane, London, SW17 0RF
- Nature of business
- Construction of other civil engineering projects n.e.c.; Retail sale via mail order houses or via Internet; Management consultancy activities other than financial management; Other engineering activities
1 Mo Limited is a 6-year-old private limited company registered in London, company number 12593926, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 24 December 2026, and its first CT600 is due at HMRC on 24 December 2026.
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 £2,640 (+41.4%) on the year before, to £9,010.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £29K against £20K owed within a year: 1.4 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 5 years, 2020 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 24 Dec 2024 | £9,010 | £24K | £29K | £20K | 1 |
| 24 Dec 2023 | £6,370 | £14K | £8,122 | 1 | |
| 24 Dec 2022 | £461 | £18K | £18K | 1 | |
| 24 Dec 2021 | £341 | £5,192 | £4,851 | 1 | |
| 24 Dec 2020 | £966 | £2,119 | £1,153 | 1 |
Where 1 Mo Limited is registered
The registered office is in London (SW17), in the Merton local authority area, London. Show SW17 0RF on a map.
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What happens if 1 Mo 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 24 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 25 Dec 2026 to 24 Jan 2027 | £150 |
| 1 to 3 months late | 25 Jan 2027 to 24 Mar 2027 | £375 |
| 3 to 6 months late | 25 Mar 2027 to 24 Jun 2027 | £750 |
| More than 6 months late | From 25 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 25 Mar 2027 | £200 |
| 3 months late | 24 Jun 2027 | another £200 |
| 6 months late | 24 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 24 Mar 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
- 12593926
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 May 2020 (6 years ago)
- Registered office
- 111 Orton House, Plough Lane, London, SW17 0RF
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
Retail sale via mail order houses or via Internet (SIC 47910)
Management consultancy activities other than financial management (SIC 70229)
Other engineering activities (SIC 71129) - Year end
- 24 December (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 24 December 2024
- Last confirmation statement
- 2 May 2026
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in London
Other active civil engineering contractors registered in London.
- 2-3Ways TM Ltd2023
- 27 Group Ltd2023
- 3 Dots Eng Ltd2021
- 3 NRG Ltd2025
- 3 Pillars Civils Ltd2026
- 360 Workspace Ltd2024
- 3D Art Factory Ltd2014
- 3D'S Building Solutions Ltd2020
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are 1 Mo Limited's accounts due?
1 Mo Limited's next accounts are due at Companies House by 24 December 2026 (in 73 days), covering the period to 24 March 2026.
When is 1 Mo Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 24 December 2025, due by 24 December 2026, and one for the period to 24 March 2026, due by 24 March 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is 1 Mo Limited still trading?
1 Mo 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 1 Mo Limited do?
1 Mo Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990); Retail sale via mail order houses or via Internet (SIC 47910); Management consultancy activities other than financial management (SIC 70229); Other engineering activities (SIC 71129).
How old is 1 Mo Limited?
1 Mo Limited was incorporated on 11 May 2020, 6 years ago.
What is the penalty if 1 Mo 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 1 Mo 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.