A.Cdunn Ltd
- Company number
- 17346886
- Incorporated
- 17 Jul 2026
- Registered office
- 10 Clermont Road, London, E9 7RR
- Nature of business
- Repair of machinery; Other specialised construction activities n.e.c.
A.Cdunn Ltd is a newly incorporated private limited company registered in London, company number 17346886, one of 1,743 machinery repair and installation companies in London. Its next accounts are due at Companies House on 17 April 2028, and its first CT600 is due at HMRC on 16 July 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 A.Cdunn Ltd is registered
The registered office is in London (E9), in the Hackney local authority area, London. Show E9 7RR on a map.
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What happens if A.Cdunn 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 17 April 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 18 Apr 2028 to 17 May 2028 | £150 |
| 1 to 3 months late | 18 May 2028 to 17 Jul 2028 | £375 |
| 3 to 6 months late | 18 Jul 2028 to 17 Oct 2028 | £750 |
| More than 6 months late | From 18 Oct 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2028 | £200 |
| 3 months late | 31 Oct 2028 | another £200 |
| 6 months late | 31 Jan 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 17346886
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 July 2026
- Registered office
- 10 Clermont Road, London, E9 7RR
- Nature of business
- Repair of machinery (SIC 33120)
Other specialised construction activities n.e.c. (SIC 43999) - Year end
- 31 July (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for machinery repair and installation companies
Machinery repair and installation companies often carry parts stock and specialist tools, and many work on contracts that span the year end.
Similar companies in London
Other active machinery repair and installation companies registered in London.
- A.J. Martin Ventilation Services Limited2000
- A.M.R. Heating Limited2002
- A.S. Marine Power Solutions Ltd2016
- A.S.N Driving Limited2014
- A.V.E Weld Construct Ltd2025
- A10Commercialservices Ltd2026
- A2Y Gas Heating & Plumbing Limited2023
- A2Z Essentialsfix Ltd2025
All machinery repair and installation companies in London · All trades in London · Machinery repair and installation across the UK
Frequently asked questions
When are A.Cdunn Ltd's accounts due?
A.Cdunn Ltd's next accounts are due at Companies House by 17 April 2028 (in 553 days), covering the period to 31 July 2027.
When is A.Cdunn 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 16 July 2027, due by 16 July 2028, and one for the period to 31 July 2027, due by 31 July 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is A.Cdunn Ltd still trading?
A.Cdunn 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 A.Cdunn Ltd do?
A.Cdunn Ltd is registered under Repair of machinery (SIC 33120); Other specialised construction activities n.e.c. (SIC 43999).
How old is A.Cdunn Ltd?
A.Cdunn Ltd was incorporated on 17 July 2026, less than a year ago.
What is the penalty if A.Cdunn 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 A.Cdunn 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.