- Companies
- Civil engineering
- London
- Onyx Engineering Solutions Ltd
Onyx Engineering Solutions Ltd
- Company number
- 17083279
- Incorporated
- 10 Mar 2026
- Registered office
- 4TH Floor Office, 205 Regent Street, London, W1B 4NB
- Nature of business
- Construction of utility projects for electricity and telecommunications
Onyx Engineering Solutions Ltd is a newly incorporated private limited company registered in London, company number 17083279, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 10 December 2027, and its first CT600 is due at HMRC on 9 March 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?
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Where Onyx Engineering Solutions Ltd is registered
The registered office is in London (W1B), in the Westminster local authority area, London. Show W1B 4NB on a map.
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Also registered at this address
3 other companies use the same registered office as Onyx Engineering Solutions Ltd.
- Fowler Construction Cost Management LtdProperty developers
- Halloio LtdElectricians
- Primemove Clean & Clear LimitedCleaning companies
What happens if Onyx Engineering Solutions 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 10 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 11 Dec 2027 to 10 Jan 2028 | £150 |
| 1 to 3 months late | 11 Jan 2028 to 10 Mar 2028 | £375 |
| 3 to 6 months late | 11 Mar 2028 to 10 Jun 2028 | £750 |
| More than 6 months late | From 11 Jun 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 17083279
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 March 2026
- Registered office
- 4TH Floor Office, 205 Regent Street, London, W1B 4NB
- Nature of business
- Construction of utility projects for electricity and telecommunications (SIC 42220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in London
Other active civil engineering contractors registered in London.
- Oorabbi Limited2021
- Opk Civils Ltd2026
- Optif Ltd2025
- Optima GS Ltd2019
- Opus Rail Ltd2024
- Oracha Infra Services Ltd2019
- Oran Engineering Limited2012
- Orantez Developments Ltd2008
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are Onyx Engineering Solutions Ltd's accounts due?
Onyx Engineering Solutions Ltd's next accounts are due at Companies House by 10 December 2027 (in 423 days), covering the period to 31 March 2027.
When is Onyx Engineering Solutions 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 9 March 2027, due by 9 March 2028, and one for the period to 31 March 2027, due by 31 March 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Onyx Engineering Solutions Ltd still trading?
Onyx Engineering Solutions 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 Onyx Engineering Solutions Ltd do?
Onyx Engineering Solutions Ltd is registered under Construction of utility projects for electricity and telecommunications (SIC 42220).
How old is Onyx Engineering Solutions Ltd?
Onyx Engineering Solutions Ltd was incorporated on 10 March 2026, less than a year ago.
What is the penalty if Onyx Engineering Solutions 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 Onyx Engineering Solutions 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.