- Companies
- Specialist contractors
- Rotherham
- UK Siphonic Systems Ltd
UK Siphonic Systems Ltd
- Company number
- 17177431
- Incorporated
- 23 Apr 2026
- Registered office
- 68 Devonshire Road, Maltby, Rotherham, South Yorkshire, S66 7DQ
- Nature of business
- Other specialised construction activities n.e.c.
UK Siphonic Systems Ltd is a newly incorporated private limited company registered in Rotherham, company number 17177431, one of 122 specialist construction companies in Rotherham. Its next accounts are due at Companies House on 23 January 2028, and its first CT600 is due at HMRC on 22 April 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 UK Siphonic Systems Ltd is registered
The registered office is in Rotherham (S66), in the Rotherham local authority area, Yorkshire and The Humber. Show S66 7DQ on a map.
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Also registered at this address
1 other company uses the same registered office as UK Siphonic Systems Ltd.
- CRL Projects Yorkshire LtdSpecialist contractors
What happens if UK Siphonic Systems 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 23 January 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 24 Jan 2028 to 23 Feb 2028 | £150 |
| 1 to 3 months late | 24 Feb 2028 to 23 Apr 2028 | £375 |
| 3 to 6 months late | 24 Apr 2028 to 23 Jul 2028 | £750 |
| More than 6 months late | From 24 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2028 | £200 |
| 3 months late | 30 Jul 2028 | another £200 |
| 6 months late | 30 Oct 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 17177431
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 April 2026
- Registered office
- 68 Devonshire Road, Maltby, Rotherham, South Yorkshire, S66 7DQ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 April (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 Rotherham
Other active specialist construction companies registered in Rotherham.
- Union Track Limited2006
- Utility Planners UK Ltd2015
- Uto Developments Limited2013
- WNB Services Ltd2025
- Wrecz Ltd2023
- 3RS Engineering Limited2020
- 4More Space Limited2013
- Acorn Damp Proofing Ltd2017
All specialist construction companies in Rotherham · All trades in Rotherham · Specialist contractors across the UK
Frequently asked questions
When are UK Siphonic Systems Ltd's accounts due?
UK Siphonic Systems Ltd's next accounts are due at Companies House by 23 January 2028 (in 467 days), covering the period to 30 April 2027.
When is UK Siphonic Systems 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 22 April 2027, due by 22 April 2028, and one for the period to 30 April 2027, due by 30 April 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is UK Siphonic Systems Ltd still trading?
UK Siphonic Systems 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 UK Siphonic Systems Ltd do?
UK Siphonic Systems Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is UK Siphonic Systems Ltd?
UK Siphonic Systems Ltd was incorporated on 23 April 2026, less than a year ago.
What is the penalty if UK Siphonic Systems 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 UK Siphonic Systems 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.