- Companies
- Specialist contractors
- Swansea
- Greenwarm Cyf
Greenwarm Cyf
- Company number
- 17157257
- Incorporated
- 14 Apr 2026
- Registered office
- Nicholaston House Nicholaston, Penmaen, Swansea, SA3 2HL
- Nature of business
- Other specialised construction activities n.e.c.
Greenwarm Cyf is a newly incorporated private limited company registered in Swansea, company number 17157257, one of 99 specialist construction companies in Swansea. Its next accounts are due at Companies House on 14 January 2028, and its first CT600 is due at HMRC on 13 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.
Is this your company?
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Where Greenwarm Cyf is registered
The registered office is in Swansea (SA3), in the Swansea local authority area, Wales. Show SA3 2HL on a map.
Other trade companies in SA3
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- Soulterra LtdProperty developers
- JCR Co1 LtdBuilders
- Gower Refrigeration and Air Conditioning LtdPlumbers and heating engineers
- JH Energy Engineering LtdProperty developers
- GHL CC LtdFloor and wall tilers
- Jam Co1 LtdProperty developers
- Morgan Building Contractors LtdBuilders
What happens if Greenwarm Cyf 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 14 January 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 15 Jan 2028 to 14 Feb 2028 | £150 |
| 1 to 3 months late | 15 Feb 2028 to 14 Apr 2028 | £375 |
| 3 to 6 months late | 15 Apr 2028 to 14 Jul 2028 | £750 |
| More than 6 months late | From 15 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
- 17157257
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 April 2026
- Registered office
- Nicholaston House Nicholaston, Penmaen, Swansea, SA3 2HL
- 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 Swansea
Other active specialist construction companies registered in Swansea.
- H I S Group Ltd2024
- Hancock Carpentry Limited2025
- Ian Davies Investments Limited2020
- Ian Davies Plant Limited1996
- Ideal Works Ltd2013
- Industrial Inspection Ltd2023
- J & L Scaffolding (Wales) Limited2006
- J.F. Cahill Limited2006
All specialist construction companies in Swansea · All trades in Swansea · Specialist contractors across the UK
Frequently asked questions
When are Greenwarm Cyf's accounts due?
Greenwarm Cyf's next accounts are due at Companies House by 14 January 2028 (in 459 days), covering the period to 30 April 2027.
When is Greenwarm Cyf's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 13 April 2027, due by 13 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 Greenwarm Cyf still trading?
Greenwarm Cyf 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 Greenwarm Cyf do?
Greenwarm Cyf is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Greenwarm Cyf?
Greenwarm Cyf was incorporated on 14 April 2026, less than a year ago.
What is the penalty if Greenwarm Cyf 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 Greenwarm Cyf 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.