- Companies
- Civil engineering
- London
- Quamz Ltd
Quamz Ltd
- Company number
- 15371977
- Incorporated
- 27 Dec 20232 years trading
- Registered office
- 21 Gasworth Close, Gawsworth Close, London, E15 1RT
- Nature of business
- Construction of railways and underground railways
Quamz Ltd is a 2-year-old private limited company registered in London, company number 15371977, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 31 December 2026, and its first CT600 is due at HMRC on 31 December 2026.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2024
From the balance sheet at 31 December 2024, as filed at Companies House.
Where Quamz Ltd is registered
The registered office is in London (E15), in the Newham local authority area, London. Show E15 1RT on a map.
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What happens if Quamz 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
- 15371977
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 27 December 2023 (2 years ago)
- Registered office
- 21 Gasworth Close, Gawsworth Close, London, E15 1RT
- Nature of business
- Construction of railways and underground railways (SIC 42120)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2024
- Last confirmation statement
- 26 December 2025
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.
- Quasar Civils Ltd2021
- Quasar Construction Ltd2019
- Quaza Limited2015
- Qudrature Limited2020
- Qulumbe Limited2019
- Qvdevs Ltd2023
- R & P Innovations Limited2017
- R Contracting Ltd2017
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are Quamz Ltd's accounts due?
Quamz 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 Quamz Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 31 December 2025, due by 31 December 2026, and one for the period to 31 March 2026, due by 31 March 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Quamz Ltd still trading?
Quamz 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 Quamz Ltd do?
Quamz Ltd is registered under Construction of railways and underground railways (SIC 42120).
How old is Quamz Ltd?
Quamz Ltd was incorporated on 27 December 2023, 2 years ago.
What is the penalty if Quamz 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 Quamz 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.