- Companies
- Civil engineering
- London
- Kaydson Ltd
Kaydson Ltd
- Company number
- 15907371
- Incorporated
- 20 Aug 20242 years trading
- Registered office
- Unit 23 Westminster Business Centre, Printing House Lane, London, UB3 1AP
- Nature of business
- Construction of railways and underground railways; Educational support services
Kaydson Ltd is a 2-year-old private limited company registered in London, company number 15907371, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 August 2025, as filed at Companies House.
Where Kaydson Ltd is registered
The registered office is in London (UB3), in the Hillingdon local authority area, London. Show UB3 1AP on a map.
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What happens if Kaydson 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 15907371
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 August 2024 (2 years ago)
- Registered office
- Unit 23 Westminster Business Centre, Printing House Lane, London, UB3 1AP
- Nature of business
- Construction of railways and underground railways (SIC 42120)
Educational support services (SIC 85600) - Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 19 August 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.
- Kcea Limited2016
- KCR Engineering Ltd2025
- KDL Civil Solutions Ltd2026
- Keanes Limited1970
- Kent Cabling & Data Solutions Ltd2026
- Kentoler Limited2015
- Kernow Power Limited2024
- Kero TM Ltd2024
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are Kaydson Ltd's accounts due?
Kaydson Ltd's next accounts are due at Companies House by 31 May 2027 (in 231 days), covering the period to 31 August 2026.
When is Kaydson Ltd's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Kaydson Ltd still trading?
Kaydson Ltd is listed as active on the Companies House register (checked 12 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 Kaydson Ltd do?
Kaydson Ltd is registered under Construction of railways and underground railways (SIC 42120); Educational support services (SIC 85600).
How old is Kaydson Ltd?
Kaydson Ltd was incorporated on 20 August 2024, 2 years ago.
What is the penalty if Kaydson 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 Kaydson Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.