- Companies
- Specialist contractors
- London
- William Kennedy Group Ltd
William Kennedy Group Ltd
- Company number
- 15566130
- Incorporated
- 16 Mar 20242 years trading
- Registered office
- Office 126, 4 Montpelier Street, Knightsbridge, London, SW7 1EE
- Nature of business
- Other specialised construction activities n.e.c.
William Kennedy Group Ltd is a 2-year-old private limited company registered in London, company number 15566130, 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.
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Financial snapshot, 2025
From the balance sheet at 31 March 2025, as filed at Companies House.
Where William Kennedy Group Ltd is registered
The registered office is in London (SW7), in the Westminster local authority area, London. Show SW7 1EE on a map.
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What happens if William Kennedy Group 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
- 15566130
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 March 2024 (2 years ago)
- Registered office
- Office 126, 4 Montpelier Street, Knightsbridge, London, SW7 1EE
- 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
- 14 January 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.
- Williams&Sons Ltd2026
- Willy John Ltd2025
- Winchmore Brickwork Group Ltd2006
- Winchmore Brickwork Limited1998
- Windleigh Developments Ltd2018
- Winteg Limited2024
- Winway Jobmasters Limited2014
- Wireworks Consulting Ltd2025
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are William Kennedy Group Ltd's accounts due?
William Kennedy Group 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 William Kennedy Group 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 William Kennedy Group Ltd still trading?
William Kennedy Group 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 William Kennedy Group Ltd do?
William Kennedy Group Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is William Kennedy Group Ltd?
William Kennedy Group Ltd was incorporated on 16 March 2024, 2 years ago.
What is the penalty if William Kennedy Group 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 William Kennedy Group 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.