- Companies
- Plumbers and heating engineers
- Cardiff
- Cookmech Ltd
Cookmech Ltd
- Company number
- 15551299
- Incorporated
- 9 Mar 20242 years trading
- Registered office
- 20 Lothian Crescent, Penylan, Cardiff, CF23 9HY
- Nature of business
- Plumbing, heat and air-conditioning installation
Cookmech Ltd is a 2-year-old private limited company registered in Cardiff, company number 15551299, one of 170 plumbing and heating companies in Cardiff. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
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 £35K (+819.5%) on the year before, to £40K.
- Current assets of £15K against £15K owed within a year: 1.0 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 2 years, 2025 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £40K | £15K | £15K | 1 | |
| 31 Mar 2025 | £4,324 | £9,653 | £18K | 1 |
Where Cookmech Ltd is registered
The registered office is in Cardiff (CF23), in the Cardiff local authority area, Wales. Show CF23 9HY on a map.
Other trade companies in CF23
- Ellisp LtdSpecialist contractors
- J & J Grounds & Buildings Maintenance LtdLandscapers and gardeners
- Halo Mobile Specialists LtdMechanics and garages
- 1ST Choice Accident Repair Centre (Yeovil) LtdMechanics and garages
- Wide Transport LtdMotor traders
- Ace Windscreens LtdMechanics and garages
- Lex Roofing Solutions LtdRoofers
- Taxissories LtdMotor traders
What happens if Cookmech 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 31 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 15551299
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 March 2024 (2 years ago)
- Registered office
- 20 Lothian Crescent, Penylan, Cardiff, CF23 9HY
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 8 March 2026
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Cardiff
Other active plumbing and heating companies registered in Cardiff.
- Copa Services Limited2018
- Cosywarm Heating and Plumbing Limited2011
- Cosywarm Servicing Limited2026
- Decorative Heating Limited2003
- Desk Pure Filt Limited2025
- DJ Miller Plumbing Limited2019
- DWR Plumbing Ltd2026
- E & A Heating and Plumbing Limited2015
All plumbing and heating companies in Cardiff · All trades in Cardiff · Plumbers and heating engineers across the UK
Frequently asked questions
When are Cookmech Ltd's accounts due?
Cookmech Ltd's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is Cookmech Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Cookmech Ltd still trading?
Cookmech 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 Cookmech Ltd do?
Cookmech Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Cookmech Ltd?
Cookmech Ltd was incorporated on 9 March 2024, 2 years ago.
What is the penalty if Cookmech 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 Cookmech 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.