- Companies
- Specialist contractors
- Luton
- Ultranetix Ltd
Ultranetix Ltd
- Company number
- 17046848
- Incorporated
- 22 Feb 2026
- Registered office
- 171 North Street, Luton, LU2 7QH
- Nature of business
- Other specialised construction activities n.e.c.; Wired telecommunications activities
Ultranetix Ltd is a newly incorporated private limited company registered in Luton, company number 17046848, one of 195 specialist construction companies in Luton. Its next accounts are due at Companies House on 22 November 2027, and its first CT600 is due at HMRC on 21 February 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 Ultranetix Ltd is registered
The registered office is in Luton (LU2), in the Luton local authority area, East of England. Show LU2 7QH on a map.
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What happens if Ultranetix 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 22 November 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 23 Nov 2027 to 22 Dec 2027 | £150 |
| 1 to 3 months late | 23 Dec 2027 to 22 Feb 2028 | £375 |
| 3 to 6 months late | 23 Feb 2028 to 22 May 2028 | £750 |
| More than 6 months late | From 23 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Feb 2028 | £200 |
| 3 months late | 28 May 2028 | another £200 |
| 6 months late | 28 Aug 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 17046848
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 February 2026
- Registered office
- 171 North Street, Luton, LU2 7QH
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Wired telecommunications activities (SIC 61100) - Year end
- 28 February (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 Luton
Other active specialist construction companies registered in Luton.
- United Energy Limited2025
- Up Steel Limited2025
- Vicram Ltd2026
- Viridus Energy Projects Limited2024
- W & H Drives and Design Ltd2024
- West Coast Fire Services Ltd2023
- William UK Construction Limited2017
- A & S Sopa Construction Limited2017
All specialist construction companies in Luton · All trades in Luton · Specialist contractors across the UK
Frequently asked questions
When are Ultranetix Ltd's accounts due?
Ultranetix Ltd's next accounts are due at Companies House by 22 November 2027 (in 406 days), covering the period to 28 February 2027.
When is Ultranetix 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 21 February 2027, due by 21 February 2028, and one for the period to 28 February 2027, due by 28 February 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Ultranetix Ltd still trading?
Ultranetix 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 Ultranetix Ltd do?
Ultranetix Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999); Wired telecommunications activities (SIC 61100).
How old is Ultranetix Ltd?
Ultranetix Ltd was incorporated on 22 February 2026, less than a year ago.
What is the penalty if Ultranetix 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 Ultranetix 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.