- Companies
- Specialist contractors
- London
- Cowley High Voltage Systems Ltd
Cowley High Voltage Systems Ltd
- Company number
- 16055378
- Incorporated
- 1 Nov 20241 year trading
- Registered office
- C/O Hard Hat Group, 320 City Road, London, EC1V 2NZ
- Nature of business
- Other specialised construction activities n.e.c.
Cowley High Voltage Systems Ltd is a 1-year-old private limited company registered in London, company number 16055378, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 30 November 2025, as filed at Companies House.
Who runs and owns Cowley High Voltage Systems Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| H*** C*** | Director | Nov 2024 |
Person with significant control
Where Cowley High Voltage Systems Ltd is registered
The registered office is in London (EC1V), in the Islington local authority area, London. Show EC1V 2NZ on a map.
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- The Tile Craft LtdFinishing trades
- Cathal Od Solutions LtdSpecialist contractors
Shared registered office
67 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Cowley High Voltage Systems 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 16055378
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 November 2024 (1 year ago)
- Registered office
- C/O Hard Hat Group, 320 City Road, London, EC1V 2NZ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 31 October 2025
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.
- CPK Facilities Management Ltd2026
- Cpli Ltd2016
- CPRP Services Limited2021
- CQ Engineering Ltd2018
- CR Flooring Services Ltd2023
- Craciun Groundwork Ltd2020
- Crafted Constructions Ltd2026
- Crafted Spaces Construction Ltd2026
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Frequently asked questions
When are Cowley High Voltage Systems Ltd's accounts due?
Cowley High Voltage Systems Ltd's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is Cowley High Voltage Systems Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Cowley High Voltage Systems Ltd still trading?
Cowley High Voltage Systems 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 Cowley High Voltage Systems Ltd do?
Cowley High Voltage Systems Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Cowley High Voltage Systems Ltd?
Cowley High Voltage Systems Ltd was incorporated on 1 November 2024, 1 year ago.
Who runs Cowley High Voltage Systems Ltd?
Cowley High Voltage Systems Ltd has 1 active director, the longest-serving appointed in Nov 2024. Their names and service addresses are on the Companies House register.
Who owns Cowley High Voltage Systems Ltd?
One person or company has significant control of Cowley High Voltage Systems Ltd: an individual (owns 75% or more of the shares).
What is the penalty if Cowley High Voltage Systems 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 Cowley High Voltage Systems 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.