- Companies
- Builders
- Caerphilly
- J.& M. Cook (Builders) Limited
J.& M. Cook (Builders) Limited
- Company number
- 02260317
- Incorporated
- 19 May 198838 years trading
- Registered office
- 13 Glyn Derwen, Llanbradach, Caerphilly, Mid Glamorgan, CF83 3PQ
- Nature of business
- Construction of domestic buildings; Other building completion and finishing
J.& M. Cook (Builders) Limited is a 38-year-old private limited company registered in Caerphilly, company number 02260317, one of 37 building contractors in Caerphilly. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 £22K (-9.7%) on the year before, to £204K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £212K against £33K owed within a year: 6.4 times cover.
- 5 employees on average during the year.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2026 | £204K | £212K | £33K | 5 | |
| 31 May 2025 | £226K | £257K | £26K | 5 | |
| 31 May 2024 | £198K | £234K | £35K | 5 | |
| 31 May 2023 | £174K | £190K | £19K | 5 | |
| 1 Jun 2022 | £154K | £219K | £63K | 5 | |
| 31 May 2021 | £91K | £115K | £35K | 5 | |
| 31 May 2020 | £71K | £90K | £32K | 9 | |
| 31 May 2019 | £82K | £108K | £42K | ||
| 31 May 2018 | £73K | £88K | £34K | ||
| 31 May 2017 | £70K | £84K | £32K |
Where J.& M. Cook (Builders) Limited is registered
The registered office is in Caerphilly (CF83), in the Caerphilly local authority area, Wales. Show CF83 3PQ on a map.
Other trade companies in CF83
- Owen PM LimitedBuilders
- Ecamscymru LtdMachinery repair and installation
- Bee Green Plumbing Solutions LtdPlumbers and heating engineers
- Tyga Constuction LimitedBuilders
- Grip Rip MX LtdMotor traders
- Da' Grave LtdRepair services
- First Class Cleaning Solutions LtdCleaning companies
- Vehicle Accident Repairs Solutions LtdMotor traders
What happens if J.& M. Cook (Builders) 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 02260317
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 May 1988 (38 years ago)
- Registered office
- 13 Glyn Derwen, Llanbradach, Caerphilly, Mid Glamorgan, CF83 3PQ
- Nature of business
- Construction of domestic buildings (SIC 41202)
Other building completion and finishing (SIC 43390) - Year end
- 31 May (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 4 October 2025
- Charges (mortgages)
- 1 outstanding of 2 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 Caerphilly
Other active building contractors registered in Caerphilly.
- JMG Consulting and Investments Limited2025
- Jones Fire Ltd2023
- K Pole Building Services Ltd2013
- Ko Plumbing Heating Ltd2021
- LPJ Property Revive Ltd2026
- Melyn Construction Limited2019
- Melyn Facilities Limited2025
- MGC West Wales Limited2020
All building contractors in Caerphilly · All trades in Caerphilly · Builders across the UK
Frequently asked questions
When are J.& M. Cook (Builders) Limited's accounts due?
J.& M. Cook (Builders) Limited's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is J.& M. Cook (Builders) Limited's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is J.& M. Cook (Builders) Limited still trading?
J.& M. Cook (Builders) 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 J.& M. Cook (Builders) Limited do?
J.& M. Cook (Builders) Limited is registered under Construction of domestic buildings (SIC 41202); Other building completion and finishing (SIC 43390).
How old is J.& M. Cook (Builders) Limited?
J.& M. Cook (Builders) Limited was incorporated on 19 May 1988, 38 years ago.
What is the penalty if J.& M. Cook (Builders) 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 J.& M. Cook (Builders) 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.