- Companies
- Property developers
- London
- Mosum Limited
Mosum Limited
- Company number
- 10521208
- Incorporated
- 12 Dec 20169 years trading
- Registered office
- 112 Commercial Road, London, E1 1NU
- Nature of business
- Development of building projects; Construction of commercial buildings; Other letting and operating of own or leased real estate
Mosum Limited is a 9-year-old private limited company registered in London, company number 10521208, 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 £66K (+29.8%) on the year before, to £287K.
- Net assets rose in 6 of 8 year-on-year comparisons on record.
- Current assets of £570K against £5.4M owed within a year: 0.1 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £287K | £11K | £570K | £5.4M | 2 |
| 31 Dec 2024 | £221K | £1,871 | £78K | £5M | 2 |
| 31 Dec 2023 | £301K | £96K | £172K | £5.1M | 2 |
| 31 Dec 2022 | £371K | £228K | £299K | £2.3M | 2 |
| 31 Dec 2021 | £234K | £151K | £294K | £2.3M | 2 |
| 31 Dec 2020 | £162K | £301K | £337K | £2.3M | 2 |
| 31 Dec 2019 | £150K | £252K | £324K | £2.3M | 2 |
| 31 Dec 2018 | £59K | £259K | £331K | £2.3M | 2 |
| 31 Dec 2017 | -£26K | £243K | £315K | £2.2M | 2 |
Where Mosum Limited is registered
The registered office is in London (E1), in the Tower Hamlets local authority area, London. Show E1 1NU on a map.
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- Hrautosources LtdMotor traders
- Choiceworks LimitedInstallers
- E.M Construction London LtdBuilders
- Qubic Maintenance LtdSpecialist contractors
- Moovin Transport LtdMechanics and garages
Also registered at this address
2 other companies use the same registered office as Mosum Limited.
- Mabble LimitedProperty developers
- Stream Development LimitedProperty developers
What happens if Mosum 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
- 10521208
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 December 2016 (9 years ago)
- Registered office
- 112 Commercial Road, London, E1 1NU
- Nature of business
- Development of building projects (SIC 41100)
Construction of commercial buildings (SIC 41201)
Other letting and operating of own or leased real estate (SIC 68209) - Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 11 December 2025
- Charges (mortgages)
- 2 outstanding of 2 registered
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.
- Motcomb Estates Limited1989
- Motion Design + Build Ltd2025
- Motson Creative Development Limited2021
- Moundfield Developments Ltd2020
- Mount Carmel Developments Limited2005
- Mount Delvin Bromley Limited2015
- Mountain Lions Limited2019
- Mountain Peak Consulting Limited2019
All property development companies in London · All trades in London · Property developers across the UK
Frequently asked questions
When are Mosum Limited's accounts due?
Mosum 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 Mosum 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 Mosum Limited still trading?
Mosum 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 Mosum Limited do?
Mosum Limited is registered under Development of building projects (SIC 41100); Construction of commercial buildings (SIC 41201); Other letting and operating of own or leased real estate (SIC 68209).
How old is Mosum Limited?
Mosum Limited was incorporated on 12 December 2016, 9 years ago.
What is the penalty if Mosum 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 Mosum 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.