- Companies
- Civil engineering
- London
- Mammone Associates Ltd
Mammone Associates Ltd
- Company number
- 06556435
- Incorporated
- 5 Apr 200818 years trading
- Registered office
- 21 James Brine House, Ravenscroft Street, London, E2 7QQ
- Nature of business
- Construction of railways and underground railways; Construction of other civil engineering projects n.e.c.
Mammone Associates Ltd is a 18-year-old private limited company registered in London, company number 06556435, one of 1,853 civil engineering contractors 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.
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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 unchanged on the year before, at £2.
- Net assets rose in 2 of 9 year-on-year comparisons on record.
- 1 employee on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £2 | £2 | 1 | ||
| 31 Mar 2024 | £2 | £2 | 1 | ||
| 31 Mar 2023 | £2 | £2 | 1 | ||
| 31 Mar 2022 | £2 | £2 | 1 | ||
| 31 Mar 2021 | £2 | £2 | 1 | ||
| 31 Mar 2020 | £2 | £2 | 1 | ||
| 31 Mar 2019 | -£2 | -£2 | |||
| 31 Mar 2018 | £2 | ||||
| 31 Mar 2017 | £2 | £2 | |||
| 31 Mar 2016 | -£150 | £150 |
Where Mammone Associates Ltd is registered
The registered office is in London (E2), in the Tower Hamlets local authority area, London. Show E2 7QQ on a map.
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What happens if Mammone Associates 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
- 06556435
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 April 2008 (18 years ago)
- Registered office
- 21 James Brine House, Ravenscroft Street, London, E2 7QQ
- Nature of business
- Construction of railways and underground railways (SIC 42120)
Construction of other civil engineering projects n.e.c. (SIC 42990) - Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 9 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.
- Maniron Ltd2023
- Manning Communications Ltd2026
- Manocap Energy Asset Company Limited2021
- Manorpride Limited2004
- Marcelo Engineering Company Ltd2014
- Marine and Civil Services Ltd2019
- Marine Shipbuilding Company UK Ltd2014
- Mark Badu Limited2015
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are Mammone Associates Ltd's accounts due?
Mammone Associates Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Mammone Associates 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 Mammone Associates Ltd still trading?
Mammone Associates 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 Mammone Associates Ltd do?
Mammone Associates Ltd is registered under Construction of railways and underground railways (SIC 42120); Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Mammone Associates Ltd?
Mammone Associates Ltd was incorporated on 5 April 2008, 18 years ago.
What is the penalty if Mammone Associates 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 Mammone Associates 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.