- Companies
- Electricians
- Covent Garden
- Onna Engineering and Contracting Ltd
Onna Engineering and Contracting Ltd
- Company number
- 17412200
- Incorporated
- 20 Aug 2026
- Registered office
- 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ
- Nature of business
- Electrical installation; Plumbing, heat and air-conditioning installation; Other engineering activities; Environmental consulting activities
Onna Engineering and Contracting Ltd is a newly incorporated private limited company registered in Covent Garden, company number 17412200, one of 274 electrical contractors in Covent Garden. Its next accounts are due at Companies House on 20 May 2028, and its first CT600 is due at HMRC on 19 August 2028.
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?
File the first accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Onna Engineering and Contracting LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
Where Onna Engineering and Contracting Ltd is registered
The registered office is in Covent Garden (WC2H), in the Camden local authority area, London. Show WC2H 9JQ on a map.
Other trade companies in WC2H
- Superclean Agency LtdCleaning companies
- Sal Cleaning LtdCleaning companies
- Cityshine Facilities Services LtdCleaning companies
- Pureoceanscleaning LtdCleaning companies
- Muca Property Group LimitedProperty developers
- E.L.G.G LtdJoiners and carpenters
- First Ascentia Integrated LtdCleaning companies
- Fixing London LtdSpecialist contractors
Shared registered office
4,529 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 Onna Engineering and Contracting 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 20 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 21 May 2028 to 20 Jun 2028 | £150 |
| 1 to 3 months late | 21 Jun 2028 to 20 Aug 2028 | £375 |
| 3 to 6 months late | 21 Aug 2028 to 20 Nov 2028 | £750 |
| More than 6 months late | From 21 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 2029 | 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
- 17412200
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 August 2026
- Registered office
- 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ
- Nature of business
- Electrical installation (SIC 43210)
Plumbing, heat and air-conditioning installation (SIC 43220)
Other engineering activities (SIC 71129)
Environmental consulting activities (SIC 74901) - Year end
- 31 August (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 Covent Garden
Other active electrical contractors registered in Covent Garden.
- Optimus Renovation Ltd2023
- Orange Works Limited2023
- P.P. Electro-Mechanical Services Limited2021
- PCM365 Ltd2025
- Pfcelectricsltd Ltd2023
- Phoenix Electro Technical Ltd2024
- Piazza Solutions Ltd2025
- Pixelfoorge Ltd2025
All electrical contractors in Covent Garden · All trades in Covent Garden · Electricians across the UK
Frequently asked questions
When are Onna Engineering and Contracting Ltd's accounts due?
Onna Engineering and Contracting Ltd's next accounts are due at Companies House by 20 May 2028 (in 586 days), covering the period to 31 August 2027.
When is Onna Engineering and Contracting 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 19 August 2027, due by 19 August 2028, and one for the period to 31 August 2027, due by 31 August 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Onna Engineering and Contracting Ltd still trading?
Onna Engineering and Contracting 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 Onna Engineering and Contracting Ltd do?
Onna Engineering and Contracting Ltd is registered under Electrical installation (SIC 43210); Plumbing, heat and air-conditioning installation (SIC 43220); Other engineering activities (SIC 71129); Environmental consulting activities (SIC 74901).
How old is Onna Engineering and Contracting Ltd?
Onna Engineering and Contracting Ltd was incorporated on 20 August 2026, less than a year ago.
What is the penalty if Onna Engineering and Contracting 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 Onna Engineering and Contracting 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.