- Companies
- Civil engineering
- Carmarthen
- John Williams & Co.(Crwbin Quarries)Limited
John Williams & Co.(Crwbin Quarries)Limited
- Company number
- 00453261
- Incorporated
- 21 Apr 194878 years trading
- Registered office
- Pantyrathro Manor, Llangain, Carmarthen, Dyfed, SA33 5AJ
- Nature of business
- Construction of roads and motorways
John Williams & Co.(Crwbin Quarries)Limited is a 78-year-old private limited company registered in Carmarthen, company number 00453261, one of 16 civil engineering contractors in Carmarthen. 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 down £2,439 (-0.1%) on the year before, to £3.1M.
- Net assets rose in 7 of 8 year-on-year comparisons on record.
- Current assets of £3.1M against £1M owed within a year: 3.0 times cover.
- 27 employees on average, up from 24 the year before.
- Balance sheets on record for 10 years, 2015 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | £3.1M | £1.6M | £3.1M | £1M | 27 |
| 30 Jun 2024 | £3.1M | £1.3M | £3M | £920K | 24 |
| 30 Jun 2023 | £3M | £969K | £3M | £996K | 24 |
| 30 Jun 2022 | £2.7M | £1.3M | £2.9M | £1M | 25 |
| 30 Jun 2021 | £2.4M | £2.2M | £3.1M | £1.4M | 24 |
| 30 Jun 2020 | £2.1M | £1.1M | £2.3M | £921K | 25 |
| 30 Jun 2019 | £2M | £1.2M | £2.1M | £853K | 26 |
| 30 Jun 2018 | £2M | £1M | £2M | £824K | 26 |
| 30 Jun 2016 | £1.7M | £860K | £2M | £906K | |
| 30 Jun 2015 | £1.5M | £833K | £1.6M | £735K |
Who runs and owns John Williams & Co.(Crwbin Quarries)Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (4)
| Name | Role | Appointed |
|---|---|---|
| E*** M*** | Director | before Apr 1992 |
| I*** M*** | Director | Dec 1996 |
| D*** M*** | Director | Oct 2005 |
| D*** M*** | Secretary | Jul 2007 |
2 former officers
| Name | Role | Appointed | Left |
|---|---|---|---|
| C*** S*** | Secretary | Jul 2007 | |
| C*** S*** | Director | Mar 2011 |
People with significant control (2)
Charges (secured borrowing)
All 4 registered charges have 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 |
|---|---|---|
| National Westminster Bank PLC | Satisfied Jan 2024 | Aug 2001 |
| National Westminster Bank PLC | Satisfied Jan 2024 | Dec 2000 |
| National Westminster Bank PLC | Satisfied Nov 1994 | Sep 1980 |
| National Westminster Bank PLC | Satisfied Apr 1991 | Feb 1977 |
Where John Williams & Co.(Crwbin Quarries)Limited is registered
The registered office is in Carmarthen (SA33), in the Carmarthenshire local authority area, Wales. Show SA33 5AJ on a map.
Other trade companies in SA33
- Ajm Energy Solutions LtdElectricians
- RSJS Renovations LtdBuilders
- Blanchart Interiors LtdFinishing trades
- Cathedral City Cleaning LtdCleaning companies
- Zavaschi LimitedCivil engineering
- P & K Kitchens LimitedFinishing trades
- MDJ Carpentry LimitedJoiners and carpenters
- Preston Plumbing Heating LtdPlumbers and heating engineers
What happens if John Williams & Co.(Crwbin Quarries)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 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
- 00453261
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 April 1948 (78 years ago)
- Registered office
- Pantyrathro Manor, Llangain, Carmarthen, Dyfed, SA33 5AJ
- Nature of business
- Construction of roads and motorways (SIC 42110)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 2 April 2026
- Charges (mortgages)
- 0 outstanding of 4 registered
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Carmarthen
Other active civil engineering contractors registered in Carmarthen.
- Jre Excavation Fencing Groundworks Ltd2023
- JRJ Terrafirma Limited2021
- P and R Networks Ltd2017
- Pro Groundworks (Carmarthen) Limited2019
- Streamline Contract Services Ltd2021
- Zavaschi Limited2026
- Allpipes Civils Ltd2022
- Brocklis Bitumen Ltd2010
All civil engineering contractors in Carmarthen · All trades in Carmarthen · Civil engineering across the UK
Frequently asked questions
When are John Williams & Co.(Crwbin Quarries)Limited's accounts due?
John Williams & Co.(Crwbin Quarries)Limited's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is John Williams & Co.(Crwbin Quarries)Limited'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 John Williams & Co.(Crwbin Quarries)Limited still trading?
John Williams & Co.(Crwbin Quarries)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 John Williams & Co.(Crwbin Quarries)Limited do?
John Williams & Co.(Crwbin Quarries)Limited is registered under Construction of roads and motorways (SIC 42110).
How old is John Williams & Co.(Crwbin Quarries)Limited?
John Williams & Co.(Crwbin Quarries)Limited was incorporated on 21 April 1948, 78 years ago.
Who runs John Williams & Co.(Crwbin Quarries)Limited?
John Williams & Co.(Crwbin Quarries)Limited has 3 active directors, the longest-serving appointed in Dec 1996. Their names and service addresses are on the Companies House register.
Who owns John Williams & Co.(Crwbin Quarries)Limited?
2 people or companies have significant control of John Williams & Co.(Crwbin Quarries)Limited: an individual (owns 50% to 75% of the shares); an individual (owns 25% to 50% of the shares).
What is the penalty if John Williams & Co.(Crwbin Quarries)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 John Williams & Co.(Crwbin Quarries)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.