- Companies
- Specialist contractors
- Pwllheli
- Cadelio Cyf
Cadelio Cyf
- Company number
- 17420240
- Incorporated
- 25 Aug 2026
- Registered office
- 1 Thomas Buildings, New Street, Pwllheli, Gwynedd, LL53 5HH
- Nature of business
- Other specialised construction activities n.e.c.; Renting and leasing of construction and civil engineering machinery and equipment
Cadelio Cyf is a newly incorporated private limited company registered in Pwllheli, company number 17420240, one of 9 specialist construction companies in Pwllheli. Its next accounts are due at Companies House on 25 May 2028, and its first CT600 is due at HMRC on 24 August 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 Cadelio Cyf is registered
The registered office is in Pwllheli (LL53), in the Gwynedd local authority area, Wales. Show LL53 5HH on a map.
Other trade companies in LL53
- E Thomas Plumbing and Heating Plymio A Gwresogi CyfPlumbers and heating engineers
- Halpine Construction LimitedJoiners and carpenters
- Feucht Engineering LtdMachinery repair and installation
- Stuart Livingstone LtdPlumbers and heating engineers
- Teiars Hughes Tyres LtdMechanics and garages
- Saevar Solutions LtdCleaning companies
- Dragon Detailing & Body Repairs LtdMotor traders
- J S Services Property LtdProperty developers
Also registered at this address
16 other companies use the same registered office as Cadelio Cyf.
- Abersoch Boat Works LimitedMachinery repair and installation
- Adeiladwaith Richard Williams Construction LtdProperty developers
- D. Jones Decorators LimitedPainters and decorators
- Dyffryn Heating LtdPlumbers and heating engineers
- E Thomas Plumbing and Heating Plymio A Gwresogi CyfPlumbers and heating engineers
- Gwynedd Windscreens LimitedMechanics and garages
- LJS Construction LimitedProperty developers
- Llnau Haze Cleaning LimitedCleaning companies
- Llyn Marine Services LimitedMachinery repair and installation
- M P Plumbing LimitedPlumbers and heating engineers
- Mela Energy LtdPlumbers and heating engineers
- Or Trefor LimitedCivil engineering
- Peninsula Security LtdElectricians
- Penllyn Conservatories LimitedInstallers
- Radix Shrewsbury LimitedLandscapers and gardeners
- Sean Booth Landscapes LimitedLandscapers and gardeners
What happens if Cadelio 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 25 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 26 May 2028 to 25 Jun 2028 | £150 |
| 1 to 3 months late | 26 Jun 2028 to 25 Aug 2028 | £375 |
| 3 to 6 months late | 26 Aug 2028 to 25 Nov 2028 | £750 |
| More than 6 months late | From 26 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 17420240
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 August 2026
- Registered office
- 1 Thomas Buildings, New Street, Pwllheli, Gwynedd, LL53 5HH
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Renting and leasing of construction and civil engineering machinery and equipment (SIC 77320) - Year end
- 31 August (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 Pwllheli
Other active specialist construction companies registered in Pwllheli.
- Cadernid Construction Cyf2024
- CBR Safety Services Ltd2014
- Llyn Caravans Limited2003
- Noel Williams A'i Fab Cyf2016
- S E Metcalfe A'i Gwmni Cyf2018
- ST Access Ltd2018
- A&A Properties & Construction Ltd2024
- Atkin Groundworks Ltd2006
All specialist construction companies in Pwllheli · All trades in Pwllheli · Specialist contractors across the UK
Frequently asked questions
When are Cadelio Cyf's accounts due?
Cadelio Cyf's next accounts are due at Companies House by 25 May 2028 (in 591 days), covering the period to 31 August 2027.
When is Cadelio 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 24 August 2027, due by 24 August 2028, and one for the period to 31 August 2027, due by 31 August 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Cadelio Cyf still trading?
Cadelio 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 Cadelio Cyf do?
Cadelio Cyf is registered under Other specialised construction activities n.e.c. (SIC 43999); Renting and leasing of construction and civil engineering machinery and equipment (SIC 77320).
How old is Cadelio Cyf?
Cadelio Cyf was incorporated on 25 August 2026, less than a year ago.
What is the penalty if Cadelio 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 Cadelio 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.