- Companies
- Electricians
- Mexborough
- STJ Installations Limited
STJ Installations Limited
- Company number
- 15566666
- Incorporated
- 16 Mar 20242 years trading
- Registered office
- 39-43 Bridge Street, Swinton, Mexborough, S64 8AP
- Nature of business
- Electrical installation
STJ Installations Limited is a 2-year-old private limited company registered in Mexborough, company number 15566666, one of 27 electrical contractors in Mexborough. 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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Financial snapshot, 2025
From the balance sheet at 31 March 2025, as filed at Companies House.
Where STJ Installations Limited is registered
The registered office is in Mexborough (S64), in the Rotherham local authority area, Yorkshire and The Humber. Show S64 8AP on a map.
Other trade companies in S64
- SB’S Home Improvements LtdRepair services
- S J Croome Construction LtdInstallers
- Sourc LtdElectricians
- Arc Building & Interiors LtdInstallers
- 3P Project Solutions LimitedSpecialist contractors
- A&H Tyres LtdMotor traders
- Northdale Construction LtdBuilders
- A.J.W Plumbing & Heating Northern LtdPlumbers and heating engineers
Shared registered office
89 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if STJ Installations 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 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
- 15566666
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 March 2024 (2 years ago)
- Registered office
- 39-43 Bridge Street, Swinton, Mexborough, S64 8AP
- Nature of business
- Electrical installation (SIC 43210)
- 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 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 Mexborough
Other active electrical contractors registered in Mexborough.
- Swann Electrical Limited2015
- Sy Secure Limited2019
- Urban Aurora Electrical Ltd2025
- Utley Group Electrical Limited2018
- Arthur Caddick Electrical Contractors Limited1999
- Circuits Electrical Limited2000
- CS Electrical (Sheffield) Limited2006
- Ecophase Group Limited2026
All electrical contractors in Mexborough · All trades in Mexborough · Electricians across the UK
Frequently asked questions
When are STJ Installations Limited's accounts due?
STJ Installations Limited's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is STJ Installations Limited'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 STJ Installations Limited still trading?
STJ Installations 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 STJ Installations Limited do?
STJ Installations Limited is registered under Electrical installation (SIC 43210).
How old is STJ Installations Limited?
STJ Installations Limited was incorporated on 16 March 2024, 2 years ago.
What is the penalty if STJ Installations 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 STJ Installations 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.