- Companies
- Electricians
- London
- CMJ Electric Services Ltd
CMJ Electric Services Ltd
- Company number
- 15829099
- Incorporated
- 9 Jul 20242 years trading
- Registered office
- 20 Wenlock Road, London, N1 7GU
- Nature of business
- Electrical installation; Management consultancy activities other than financial management
CMJ Electric Services Ltd is a 2-year-old private limited company registered in London, company number 15829099, one of 3,448 electrical contractors in London. Companies House shows its accounts as overdue: they were due on 9 April 2026.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where CMJ Electric Services Ltd is registered
The registered office is in London (N1), in the Hackney local authority area, London. Show N1 7GU on a map.
Other trade companies in N1
- Tagwise LtdSpecialist contractors
- Sphere Aviation Solutions UK LtdMachinery repair and installation
- Get IT Done Builders LtdJoiners and carpenters
- Evolution Products LimitedMotor traders
- Fleetstone Trading LtdMotor traders
- Kenneth Brady LtdElectricians
- UK Import Export LtdBuilders
- Magic Door Services LimitedMachinery repair and installation
Shared registered office
1,583 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 CMJ Electric Services Ltd files late
If the accounts reach Companies House today, the late filing penalty is £1,500 (£3,000 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 10 Apr 2026 to 9 May 2026 | £150 |
| 1 to 3 months late | 10 May 2026 to 9 Jul 2026 | £375 |
| 3 to 6 months late | 10 Jul 2026 to 9 Oct 2026 | £750 |
| More than 6 months late | From 10 Oct 2026 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2026 | £200 |
| 3 months late | 31 Oct 2026 | another £200 |
| 6 months late | 31 Jan 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 2027 | 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
- 15829099
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 July 2024 (2 years ago)
- Registered office
- 20 Wenlock Road, London, N1 7GU
- Nature of business
- Electrical installation (SIC 43210)
Management consultancy activities other than financial management (SIC 70229) - Year end
- 31 July (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 8 July 2025
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 London
Other active electrical contractors registered in London.
- CMS Electrical Ltd2022
- CMS Engineering & Comms Ltd2024
- Co2 Controls Ltd2020
- Co2 Controls Service Ltd2022
- Code Electrical Ltd2018
- Coeus Consultancy Services Ltd2022
- Colabs.Tech Limited2026
- Colin MC Construction Ltd2026
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are CMJ Electric Services Ltd's accounts due?
CMJ Electric Services Ltd's accounts were due at Companies House on 9 April 2026 and the register shows them as overdue.
When is CMJ Electric Services Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 8 July 2025, due by 8 July 2026, and one for the period to 31 July 2025, due by 31 July 2026. Corporation tax is payable 9 months and 1 day after the end of each.
Is CMJ Electric Services Ltd still trading?
CMJ Electric Services 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 CMJ Electric Services Ltd do?
CMJ Electric Services Ltd is registered under Electrical installation (SIC 43210); Management consultancy activities other than financial management (SIC 70229).
How old is CMJ Electric Services Ltd?
CMJ Electric Services Ltd was incorporated on 9 July 2024, 2 years ago.
What is the penalty if CMJ Electric 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 CMJ Electric Services 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.