- Companies
- Electricians
- Glasgow
- Trefoil Energy Systems Ltd
Trefoil Energy Systems Ltd
- Company number
- SC742839
- Incorporated
- 30 Aug 20224 years trading
- Registered office
- Suite 14 Ellismuir House Ellismuir Way, Uddingston, Glasgow, G71 5PW
- Nature of business
- Electrical installation
Trefoil Energy Systems Ltd is a 4-year-old private limited company registered in Glasgow, company number SC742839, one of 623 electrical contractors in Glasgow. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 £26K (-22.3%) on the year before, to £90K.
- Current assets of £105K against £42K owed within a year: 2.5 times cover.
- 2 employees on average, up from 1 the year before.
- Balance sheets on record for 3 years, 2023 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £90K | £105K | £42K | 2 | |
| 31 Aug 2024 | £116K | £123K | £40K | 1 | |
| 31 Aug 2023 | £34K | £61K | £40K | 1 |
Where Trefoil Energy Systems Ltd is registered
The registered office is in Glasgow (G71), in the North Lanarkshire local authority area, Scotland. Show G71 5PW on a map.
Other trade companies in G71
- Kieran Devine Plumbing & Heating LtdPlumbers and heating engineers
- Clydeview Developments LimitedProperty developers
- Oake Cleaning LtdCleaning companies
- Wali Cars LtdMotor traders
- Boom Electrical Glasgow LtdElectricians
- Cleansweep East Kilbride LimitedLandscapers and gardeners
- Cleansweep Glasgow LimitedCleaning companies
- Easy Stay Solutions LtdCleaning companies
Also registered at this address
3 other companies use the same registered office as Trefoil Energy Systems Ltd.
- KLM CNC Services Ltd.Machinery repair and installation
- McManus and Sons LtdCleaning companies
- Windowclean Scotland LimitedCleaning companies
What happens if Trefoil Energy Systems 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- SC742839
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 August 2022 (4 years ago)
- Registered office
- Suite 14 Ellismuir House Ellismuir Way, Uddingston, Glasgow, G71 5PW
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 29 August 2026
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Glasgow
Other active electrical contractors registered in Glasgow.
- True-Ohms Electrical Ltd2021
- Trust Electrical Compliance Ltd2021
- TT Electrical Contractors Ltd2017
- Unicorn Electrical Contracts Ltd2025
- Uprime Ltd2026
- Usher 1977 Limited2021
- V&S Agnew Ltd2026
- Valley Group Limited2014
All electrical contractors in Glasgow · All trades in Glasgow · Electricians across the UK
Frequently asked questions
When are Trefoil Energy Systems Ltd's accounts due?
Trefoil Energy Systems Ltd's next accounts are due at Companies House by 31 May 2027 (in 230 days), covering the period to 31 August 2026.
When is Trefoil Energy Systems Ltd's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Trefoil Energy Systems Ltd still trading?
Trefoil Energy Systems Ltd is listed as active on the Companies House register (checked 13 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 Trefoil Energy Systems Ltd do?
Trefoil Energy Systems Ltd is registered under Electrical installation (SIC 43210).
How old is Trefoil Energy Systems Ltd?
Trefoil Energy Systems Ltd was incorporated on 30 August 2022, 4 years ago.
What is the penalty if Trefoil Energy Systems 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 Trefoil Energy Systems Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.