- Companies
- Builders
- Caernarfon
- Cefn Du Construction Limited
Cefn Du Construction Limited
- Company number
- 05697430
- Incorporated
- 3 Feb 200620 years trading
- Registered office
- Llidiart Y Rhos, Bryn Coch, Llanrug, Caernarfon, LL55 4AN
- Nature of business
- Construction of domestic buildings
Cefn Du Construction Limited is a 20-year-old private limited company registered in Caernarfon, company number 05697430, one of 19 building contractors in Caernarfon. Its next accounts are due at Companies House on 2 May 2027, and the CT600 for the period to 2 August 2026 is due at HMRC on 2 August 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £148K (+18%) on the year before, to £973K.
- Net assets rose in 4 of 8 year-on-year comparisons on record.
- Current assets of £1.1M against £183K owed within a year: 6.3 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 2 Aug 2025 | £973K | £110K | £1.1M | £183K | 0 |
| 2 Aug 2024 | £824K | £183K | £1M | £201K | 0 |
| 2 Aug 2023 | £780K | £82K | £956K | £187K | 0 |
| 2 Aug 2022 | £783K | £143K | £913K | £144K | 0 |
| 2 Aug 2021 | £807K | £295K | £931K | £144K | 0 |
| 2 Aug 2020 | £835K | £443K | £977K | £158K | 1 |
| 2 Aug 2019 | £855K | £841K | £1.1M | £221K | 1 |
| 2 Aug 2018 | £638K | £285K | £824K | £192K | 1 |
| 2 Aug 2017 | £551K | £158K | £760K | £216K | 1 |
Who runs and owns Cefn Du Construction Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| A*** W*** | Director | Feb 2006 |
| C*** C*** | Secretary | Feb 2006 |
1 former officer
| Name | Role | Appointed | Left |
|---|---|---|---|
| Swift Incorporations Limited | Corporate Nominee Secretary | Feb 2006 | Feb 2006 |
Person with significant control
Charges (secured borrowing)
All 1 registered charge has been satisfied. A charge is security a lender takes over a company's assets, typically for a loan, mortgage or asset finance.
| Lender | Status | Registered |
|---|---|---|
| HSBC Bank PLC | Satisfied Jan 2023 | Oct 2007 |
Where Cefn Du Construction Limited is registered
The registered office is in Caernarfon (LL55), in the Gwynedd local authority area, Wales. Show LL55 4AN on a map.
Other trade companies in LL55
- Gic Construction & Groundworks LtdInstallers
- Caton Site Welding LtdMachinery repair and installation
- Celtic Heritage Stonemasonry LimitedCivil engineering
- Celtic Heritage Construction LimitedBuilders
- 31 High ST LimitedProperty developers
- Robertson’S Property Services LtdSpecialist contractors
- Tirion Solutions LtdElectricians
- Melltd LtdProperty developers
What happens if Cefn Du Construction Limited 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 2 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 3 May 2027 to 2 Jun 2027 | £150 |
| 1 to 3 months late | 3 Jun 2027 to 2 Aug 2027 | £375 |
| 3 to 6 months late | 3 Aug 2027 to 2 Nov 2027 | £750 |
| More than 6 months late | From 3 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 3 Aug 2027 | £200 |
| 3 months late | 2 Nov 2027 | another £200 |
| 6 months late | 2 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 2 Aug 2028 | 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
- 05697430
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 February 2006 (20 years ago)
- Registered office
- Llidiart Y Rhos, Bryn Coch, Llanrug, Caernarfon, LL55 4AN
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 2 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 2 August 2025
- Last confirmation statement
- 7 February 2026
- Charges (mortgages)
- 0 outstanding of 1 registered
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.
- Celtic Heritage Construction Limited2026
- Ceunant Construction Ltd2025
- Clen Construction Ltd2016
- Coed Madog Cyf2024
- D.R. Williams (Felinwnda) Limited1976
- Davbuckconstruction Limited2020
- David Garth Limited2020
- Emrys Williams Brickwork Contractor Ltd2008
All building contractors in Caernarfon · All trades in Caernarfon · Builders across the UK
Frequently asked questions
When are Cefn Du Construction Limited's accounts due?
Cefn Du Construction Limited's next accounts are due at Companies House by 2 May 2027 (in 201 days), covering the period to 2 August 2026.
When is Cefn Du Construction Limited's CT600 due?
The CT600 for the period to 2 August 2026 is due at HMRC by 2 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 3 May 2027.
Is Cefn Du Construction Limited still trading?
Cefn Du Construction Limited 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 Cefn Du Construction Limited do?
Cefn Du Construction Limited is registered under Construction of domestic buildings (SIC 41202).
How old is Cefn Du Construction Limited?
Cefn Du Construction Limited was incorporated on 3 February 2006, 20 years ago.
Who runs Cefn Du Construction Limited?
Cefn Du Construction Limited has 1 active director, the longest-serving appointed in Feb 2006. Their names and service addresses are on the Companies House register.
Who owns Cefn Du Construction Limited?
One person or company has significant control of Cefn Du Construction Limited: an individual (owns 75% or more of the shares).
What is the penalty if Cefn Du Construction Limited 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 Cefn Du Construction Limited 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.