- Companies
- Electricians
- London
- Monolith Electrical Services Ltd
Monolith Electrical Services Ltd
- Company number
- 16869015
- Incorporated
- 21 Nov 2025
- Registered office
- 37 Lombard Street, London, EC3V 9BQ
- Nature of business
- Electrical installation
Monolith Electrical Services Ltd is a newly incorporated private limited company registered in London, company number 16869015, one of 3,448 electrical contractors in London. Its next accounts are due at Companies House on 21 August 2027, and its first CT600 is due at HMRC on 20 November 2027.
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 Monolith Electrical Services Ltd is registered
The registered office is in London (EC3V), in the City of London local authority area, London. Show EC3V 9BQ on a map.
Other trade companies in EC3V
- Rekondition LtdRepair services
- Revora Cleaning & Hygiene Solutions LtdCleaning companies
- Kingston Leeds LimitedProperty developers
- Riverside Cleaning Group LtdCleaning companies
- Milman Services LtdInstallers
- F and F Electrical Services LtdElectricians
- Lilyame LimitedProperty developers
- Truewatt LtdElectricians
Also registered at this address
6 other companies use the same registered office as Monolith Electrical Services Ltd.
- Apex Interiors Builders LtdBuilders
- Bright Facilities LimitedFacilities management
- Duck & Bear LtdProperty developers
- GK Autosecurity LtdMotor traders
- KSJ Contractors LimitedFinishing trades
- Truewatt LtdElectricians
What happens if Monolith Electrical 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 21 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 22 Aug 2027 to 21 Sep 2027 | £150 |
| 1 to 3 months late | 22 Sep 2027 to 21 Nov 2027 | £375 |
| 3 to 6 months late | 22 Nov 2027 to 21 Feb 2028 | £750 |
| More than 6 months late | From 22 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 16869015
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 November 2025
- Registered office
- 37 Lombard Street, London, EC3V 9BQ
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 30 November (accounting reference date)
- Accounts type
- No accounts filed yet
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.
- Montanas Realty Company Ltd2026
- Moons Elec Limited2015
- Moreno Electrical Limited2015
- Morina Maintenance Ltd2023
- Moyne London Limited2001
- Mpower Construction and Maintenance Limited2025
- MR Easy Electrics Ltd2013
- MR Electrical London Limited2019
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are Monolith Electrical Services Ltd's accounts due?
Monolith Electrical Services Ltd's next accounts are due at Companies House by 21 August 2027 (in 313 days), covering the period to 30 November 2026.
When is Monolith Electrical 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 20 November 2026, due by 20 November 2027, and one for the period to 30 November 2026, due by 30 November 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Monolith Electrical Services Ltd still trading?
Monolith Electrical 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 Monolith Electrical Services Ltd do?
Monolith Electrical Services Ltd is registered under Electrical installation (SIC 43210).
How old is Monolith Electrical Services Ltd?
Monolith Electrical Services Ltd was incorporated on 21 November 2025, less than a year ago.
What is the penalty if Monolith Electrical 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 Monolith Electrical 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.