- Companies
- Specialist contractors
- Darlington
- Ah Windtech Ltd
Ah Windtech Ltd
- Company number
- 17264441
- Incorporated
- 5 Jun 2026
- Registered office
- 29 Nenthead End, Darlington, DL2 2ZF
- Nature of business
- Other specialised construction activities n.e.c.
Ah Windtech Ltd is a newly incorporated private limited company registered in Darlington, company number 17264441, one of 66 specialist construction companies in Darlington. Its next accounts are due at Companies House on 5 March 2028, and its first CT600 is due at HMRC on 4 June 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 Ah Windtech Ltd is registered
The registered office is in Darlington (DL2), in the Darlington local authority area, North East. Show DL2 2ZF on a map.
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What happens if Ah Windtech 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 5 March 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 6 Mar 2028 to 5 Apr 2028 | £150 |
| 1 to 3 months late | 6 Apr 2028 to 5 Jun 2028 | £375 |
| 3 to 6 months late | 6 Jun 2028 to 5 Sep 2028 | £750 |
| More than 6 months late | From 6 Sep 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2028 | £200 |
| 3 months late | 30 Sep 2028 | another £200 |
| 6 months late | 30 Dec 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 17264441
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 June 2026
- Registered office
- 29 Nenthead End, Darlington, DL2 2ZF
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 June (accounting reference date)
- Accounts type
- No accounts filed yet
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 Darlington
Other active specialist construction companies registered in Darlington.
- All Aspect Safety Ltd2025
- Braddan Structures Limited2008
- Broken Homes Ltd2025
- C.T. Steel Site Services Limited2001
- CB Access Ltd2023
- CL Access Ltd2024
- Cna Rigging and Lifting Solutions Ltd2026
- Cobon Validation Ltd2025
All specialist construction companies in Darlington · All trades in Darlington · Specialist contractors across the UK
Frequently asked questions
When are Ah Windtech Ltd's accounts due?
Ah Windtech Ltd's next accounts are due at Companies House by 5 March 2028 (in 510 days), covering the period to 30 June 2027.
When is Ah Windtech 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 4 June 2027, due by 4 June 2028, and one for the period to 30 June 2027, due by 30 June 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Ah Windtech Ltd still trading?
Ah Windtech 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 Ah Windtech Ltd do?
Ah Windtech Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Ah Windtech Ltd?
Ah Windtech Ltd was incorporated on 5 June 2026, less than a year ago.
What is the penalty if Ah Windtech 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 Ah Windtech 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.