- Companies
- Specialist contractors
- London
- Mars 4601 Ltd
Mars 4601 Ltd
- Company number
- 11874348
- Incorporated
- 11 Mar 20197 years trading
- Registered office
- 54 London Road, London, E13 0DE
- Nature of business
- Other specialised construction activities n.e.c.
Mars 4601 Ltd is a 7-year-old private limited company registered in London, company number 11874348, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Mars 4601 LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 unchanged on the year before, at £100.
- Net assets rose in 0 of 5 year-on-year comparisons on record.
- 2 employees on average, up from 1 the year before.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £100 | 2 | |||
| 31 Mar 2024 | £100 | 1 | |||
| 31 Mar 2023 | £100 | 1 | |||
| 31 Mar 2022 | £100 | £0 | 1 | ||
| 31 Mar 2021 | £100 | 1 | |||
| 31 Mar 2020 | £1,671 | £1,571 | 1 |
Where Mars 4601 Ltd is registered
The registered office is in London (E13), in the Newham local authority area, London. Show E13 0DE on a map.
Other trade companies in E13
- Tvaran Services LtdInstallers
- Theenginehub LimitedMechanics and garages
- Alpha M&E Contractors LtdElectricians
- Kanth LtdSpecialist contractors
- Franktina's Motors LtdMotor traders
- GXD Construction LtdBuilders
- Five Star Maintenance LtdFinishing trades
- N Ali Builders LtdBuilders
Also registered at this address
7 other companies use the same registered office as Mars 4601 Ltd.
- Alex Cleaning London LtdCleaning companies
- BG-Spi LtdSpecialist contractors
- Electrical Engeneering LtdInstallers
- GGV-GB- LtdBuilders
- Mik-88 LtdInstallers
- NMS 712 LtdSpecialist contractors
- V&D Trade LtdInstallers
What happens if Mars 4601 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 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
- 11874348
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 March 2019 (7 years ago)
- Registered office
- 54 London Road, London, E13 0DE
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 10 March 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in London
Other active specialist construction companies registered in London.
- Martin & CM Properties Ltd2020
- Martin Build Group Ltd2019
- Martin Way Building and Joinery Ltd2021
- Martinelli Construction + Glazing Ltd2025
- Martinneli Ltd2020
- Marvas Contractors Limited2023
- Marylebone Construction and Maintenance Ltd2017
- Mas London Group Ltd2026
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Mars 4601 Ltd's accounts due?
Mars 4601 Ltd's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Mars 4601 Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Mars 4601 Ltd still trading?
Mars 4601 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 Mars 4601 Ltd do?
Mars 4601 Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Mars 4601 Ltd?
Mars 4601 Ltd was incorporated on 11 March 2019, 7 years ago.
What is the penalty if Mars 4601 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 Mars 4601 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.