- Companies
- Plumbers and heating engineers
- Pontyclun
- Trio Mechanical Services Ltd
Trio Mechanical Services Ltd
- Company number
- 10039210
- Incorporated
- 2 Mar 201610 years trading
- Registered office
- Unit 5 B, Cambrian Industrial Estate East Side, Coedcae Lane, Pontyclun, CF72 9EW
- Nature of business
- Plumbing, heat and air-conditioning installation
Trio Mechanical Services Ltd is a 10-year-old private limited company registered in Pontyclun, company number 10039210, one of 13 plumbing and heating companies in Pontyclun. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 £8,454 (-132.1%) on the year before, to -£15K.
- Net assets rose in 3 of 8 year-on-year comparisons on record.
- Current assets of £32K against £49K owed within a year: 0.7 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 |
|---|---|---|---|---|---|
| 31 Mar 2025 | -£15K | £1,908 | £32K | £49K | 0 |
| 31 Mar 2024 | -£6,401 | £5,211 | £40K | £48K | 4 |
| 31 Mar 2023 | £16K | £35K | £86K | £72K | 2 |
| 31 Mar 2022 | £1,395 | £1,800 | £37K | £37K | 2 |
| 31 Mar 2021 | £22K | £14K | £73K | £55K | 3 |
| 31 Mar 2020 | £8,219 | £3,339 | £38K | £29K | 3 |
| 31 Mar 2019 | £15K | £25K | £48K | £34K | |
| 31 Mar 2018 | £68K | £67K | £19K | ||
| 31 Mar 2017 | £53K | £53K | £19K |
Where Trio Mechanical Services Ltd is registered
The registered office is in Pontyclun (CF72), in the Rhondda Cynon Taf local authority area, Wales. Show CF72 9EW on a map.
Other trade companies in CF72
- J Langdon Developments LtdBuilders
- Fortis DS LtdMachinery repair and installation
- Barcombe Commercial & Property Services LtdFinishing trades
- JMP Gas Plumbing and Heating LtdPlumbers and heating engineers
- Mgreenroofing LtdRoofers
- Vent-Ways LtdInstallers
- O&R Autohaus LimitedMechanics and garages
- Acer Garden Retreats LtdJoiners and carpenters
Also registered at this address
3 other companies use the same registered office as Trio Mechanical Services Ltd.
- Trio Building Contractors LtdProperty developers
- Trio Business Group LtdProperty developers
- Trio Solutions LtdProperty developers
What happens if Trio Mechanical Services 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 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 10039210
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 March 2016 (10 years ago)
- Registered office
- Unit 5 B, Cambrian Industrial Estate East Side, Coedcae Lane, Pontyclun, CF72 9EW
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 15 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 Pontyclun
Other active plumbing and heating companies registered in Pontyclun.
- Boilercraft Ltd2025
- Brandane Group Limited2026
- Ellis and Turner Limited2005
- Hothouse Plumbing Limited2013
- Ipw Climatech Ltd2025
- JMP Gas Plumbing and Heating Ltd2026
- Oasis Pools Limited2026
- Prings Plumbing and Heating Ltd.2017
All plumbing and heating companies in Pontyclun · All trades in Pontyclun · Plumbers and heating engineers across the UK
Frequently asked questions
When are Trio Mechanical Services Ltd's accounts due?
Trio Mechanical Services Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Trio Mechanical Services Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Trio Mechanical Services Ltd still trading?
Trio Mechanical Services 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 Trio Mechanical Services Ltd do?
Trio Mechanical Services Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Trio Mechanical Services Ltd?
Trio Mechanical Services Ltd was incorporated on 2 March 2016, 10 years ago.
What is the penalty if Trio Mechanical Services 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 Trio Mechanical Services 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.