- Companies
- Electricians
- London
- Cosmo Av & Security Ltd.
Cosmo Av & Security Ltd.
- Company number
- 16820138
- Incorporated
- 30 Oct 2025
- Registered office
- Flat 1, High Road, London, N12 8PR
- Nature of business
- Electrical installation
Cosmo Av & Security Ltd. is a newly incorporated private limited company registered in London, company number 16820138, one of 3,448 electrical contractors in London. Its next accounts are due at Companies House on 30 July 2027, and its first CT600 is due at HMRC on 29 October 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.
Is this your company?
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Where Cosmo Av & Security Ltd. is registered
The registered office is in London (N12), in the Barnet local authority area, London. Show N12 8PR on a map.
Other trade companies in N12
- Sullivan Property and Maintenance LtdFacilities management
- Mael Property Services LtdFinishing trades
- Horizon Constructors LtdProperty developers
- Alfawine Group LimitedFinishing trades
- Sam Motors Group LimitedMotor traders
- Heating on Demand LtdPlumbers and heating engineers
- Premium Electrical LtdElectricians
- Amaiya Sparks LtdCleaning companies
What happens if Cosmo Av & Security 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 30 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 31 Jul 2027 to 30 Aug 2027 | £150 |
| 1 to 3 months late | 31 Aug 2027 to 30 Oct 2027 | £375 |
| 3 to 6 months late | 31 Oct 2027 to 30 Jan 2028 | £750 |
| More than 6 months late | From 31 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 16820138
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 October 2025
- Registered office
- Flat 1, High Road, London, N12 8PR
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 October (accounting reference date)
- Accounts type
- No accounts filed yet
- Previous names
- Cosmo Aircon & Ventilation Ltd (until 18 Sep 2026)
Cosmo Av & Security Ltd (until 17 Aug 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 London
Other active electrical contractors registered in London.
- Cota Building Services Ltd2023
- Coutts Electrical Group International Limited2026
- Covtek Limited1999
- Cowboy Plumbing and Heating Ltd2025
- Coxxcom Limited2024
- CQT Electrician Ltd2024
- Cranley Group Limited2026
- CRD Electrical Ltd2019
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are Cosmo Av & Security Ltd.'s accounts due?
Cosmo Av & Security Ltd.'s next accounts are due at Companies House by 30 July 2027 (in 290 days), covering the period to 31 October 2026.
When is Cosmo Av & Security 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 29 October 2026, due by 29 October 2027, and one for the period to 31 October 2026, due by 31 October 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Cosmo Av & Security Ltd. still trading?
Cosmo Av & Security 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 Cosmo Av & Security Ltd. do?
Cosmo Av & Security Ltd. is registered under Electrical installation (SIC 43210).
How old is Cosmo Av & Security Ltd.?
Cosmo Av & Security Ltd. was incorporated on 30 October 2025, less than a year ago.
What is the penalty if Cosmo Av & Security 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 Cosmo Av & Security 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.