- Companies
- Builders
- Caernarfon
- Rirox Ltd
Rirox Ltd
- Company number
- 17022750
- Incorporated
- 10 Feb 2026
- Registered office
- Bronant, Rhostryfan, Caernarfon, LL54 7NF
- Nature of business
- Construction of domestic buildings
Rirox Ltd is a newly incorporated private limited company registered in Caernarfon, company number 17022750, one of 19 building contractors in Caernarfon. Its next accounts are due at Companies House on 10 November 2027, and its first CT600 is due at HMRC on 9 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 Rirox Ltd is registered
The registered office is in Caernarfon (LL54), in the Gwynedd local authority area, Wales. Show LL54 7NF on a map.
Other trade companies in LL54
- Ow Autos LimitedMechanics and garages
- Sej Motors LtdMechanics and garages
- Aw Diving LtdCivil engineering
- PWG Construction LtdBuilders
- Cars Gwynedd LimitedMotor traders
- Gwasanaethau Adeiladu A Chyfleustodau WR Construction and Utility Services LimitedInstallers
- CLP Surfacing & Groundworks LtdCivil engineering
- Eltec Autoparts LtdMotor traders
What happens if Rirox 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 10 November 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 11 Nov 2027 to 10 Dec 2027 | £150 |
| 1 to 3 months late | 11 Dec 2027 to 10 Feb 2028 | £375 |
| 3 to 6 months late | 11 Feb 2028 to 10 May 2028 | £750 |
| More than 6 months late | From 11 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
- 17022750
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 February 2026
- Registered office
- Bronant, Rhostryfan, Caernarfon, LL54 7NF
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 28 February (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Caernarfon
Other active building contractors registered in Caernarfon.
- Cefn Du Construction Limited2006
- Celtic Heritage Construction Limited2026
- Ceunant Construction Ltd2025
- Clen Construction Ltd2016
- Coed Madog Cyf2024
- D.R. Williams (Felinwnda) Limited1976
- Davbuckconstruction Limited2020
- David Garth Limited2020
All building contractors in Caernarfon · All trades in Caernarfon · Builders across the UK
Frequently asked questions
When are Rirox Ltd's accounts due?
Rirox Ltd's next accounts are due at Companies House by 10 November 2027 (in 394 days), covering the period to 28 February 2027.
When is Rirox 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 9 February 2027, due by 9 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 Rirox Ltd still trading?
Rirox 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 Rirox Ltd do?
Rirox Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Rirox Ltd?
Rirox Ltd was incorporated on 10 February 2026, less than a year ago.
What is the penalty if Rirox 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 Rirox 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.