- Companies
- Electricians
- London
- Claystone Commercial Ltd
Claystone Commercial Ltd
- Company number
- 17108721
- Incorporated
- 23 Mar 2026
- Registered office
- Lynton House, 7-12 Tavistock Square, London, WC1H 9BQ
- Nature of business
- Electrical installation; Other engineering activities
Claystone Commercial Ltd is a newly incorporated private limited company registered in London, company number 17108721, one of 3,448 electrical contractors in London. Its next accounts are due at Companies House on 23 December 2027, and its first CT600 is due at HMRC on 22 March 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Claystone Commercial Ltd is registered
The registered office is in London (WC1H), in the Camden local authority area, London. Show WC1H 9BQ on a map.
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Shared registered office
73 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 Claystone Commercial 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 23 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 24 Dec 2027 to 23 Jan 2028 | £150 |
| 1 to 3 months late | 24 Jan 2028 to 23 Mar 2028 | £375 |
| 3 to 6 months late | 24 Mar 2028 to 23 Jun 2028 | £750 |
| More than 6 months late | From 24 Jun 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2029 | 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
- 17108721
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 March 2026
- Registered office
- Lynton House, 7-12 Tavistock Square, London, WC1H 9BQ
- Nature of business
- Electrical installation (SIC 43210)
Other engineering activities (SIC 71129) - Year end
- 31 March (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in London
Other active electrical contractors registered in London.
- Clean Hertz Electrical Ltd2025
- Clear Escape Ventilation Ltd2026
- Clear Maintenance Ltd2021
- Clearpath Fra Ltd2026
- Cleaver Electrical Services Limited2006
- Clever and Simple Ltd2015
- Clever Solar Ltd2026
- CLH Electrical Solutions Ltd2026
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are Claystone Commercial Ltd's accounts due?
Claystone Commercial Ltd's next accounts are due at Companies House by 23 December 2027 (in 436 days), covering the period to 31 March 2027.
When is Claystone Commercial 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 22 March 2027, due by 22 March 2028, and one for the period to 31 March 2027, due by 31 March 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Claystone Commercial Ltd still trading?
Claystone Commercial 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 Claystone Commercial Ltd do?
Claystone Commercial Ltd is registered under Electrical installation (SIC 43210); Other engineering activities (SIC 71129).
How old is Claystone Commercial Ltd?
Claystone Commercial Ltd was incorporated on 23 March 2026, less than a year ago.
What is the penalty if Claystone Commercial 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 Claystone Commercial 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.