Eilir Williams Cyf
- Company number
- 08587085
- Incorporated
- 27 Jun 201313 years trading
- Registered office
- 12 Station Terrace, Llanybydder, Carms, SA40 9XX
- Nature of business
- Construction of commercial buildings
Eilir Williams Cyf is a 13-year-old private limited company registered in Carms, company number 08587085, one of the UK's building contractors. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 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 £40K (+23.5%) on the year before, to £211K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £103K against £26K owed within a year: 4.0 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | £211K | £103K | £26K | 2 | |
| 30 Jun 2024 | £171K | £103K | £30K | 2 | |
| 30 Jun 2023 | £131K | £128K | £57K | 2 | |
| 30 Jun 2022 | £113K | £139K | £71K | 2 | |
| 30 Jun 2021 | £110K | £101K | £36K | 3 | |
| 30 Jun 2020 | £106K | £60K | £16K | 2 | |
| 30 Jun 2019 | £116K | £68K | £15K | ||
| 30 Jun 2018 | £106K | £87K | £49K | ||
| 30 Jun 2017 | £86K | £42K | £82K | £40K | |
| 30 Jun 2016 | £56K | £50K | £60K | £31K |
Where Eilir Williams Cyf is registered
The registered office is in Carms (SA40), in the Carmarthenshire local authority area, Wales. Show SA40 9XX on a map.
Other trade companies in SA40
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- Pro Resurfacing LtdGroundworks and demolition
- Carreg Liquid Screeding LimitedBuilders
- Mayes Tyres Services LimitedMotor traders
- Jus 2 LtdProperty developers
- Duo Cars LtdMotor traders
- C.P Arb & Garden Services LtdLandscapers and gardeners
- Holmes Property & Investments LtdProperty developers
Also registered at this address
7 other companies use the same registered office as Eilir Williams Cyf.
- A.P.Commercials LtdMechanics and garages
- Duo Cars LtdMotor traders
- Eh Lloyd CyfBuilders
- Ibj Construction LtdBuilders
- Pennant Garage Doors LtdInstallers
- Proclean Painting & Decorating Ltd.Painters and decorators
- Thomas Tyres Ltd.Machinery repair and installation
What happens if Eilir Williams 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 31 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 08587085
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 27 June 2013 (13 years ago)
- Registered office
- 12 Station Terrace, Llanybydder, Carms, SA40 9XX
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 27 June 2026
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
Other active building contractors.
Frequently asked questions
When are Eilir Williams Cyf's accounts due?
Eilir Williams Cyf's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is Eilir Williams Cyf's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Eilir Williams Cyf still trading?
Eilir Williams 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 Eilir Williams Cyf do?
Eilir Williams Cyf is registered under Construction of commercial buildings (SIC 41201).
How old is Eilir Williams Cyf?
Eilir Williams Cyf was incorporated on 27 June 2013, 13 years ago.
What is the penalty if Eilir Williams 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 Eilir Williams 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.