- Companies
- Civil engineering
- London
- O Armstrong Engineering Services Ltd
O Armstrong Engineering Services Ltd
- Company number
- 17236058
- Incorporated
- 21 May 2026
- Registered office
- 20 Wenlock Road, London, N1 7GU
- Nature of business
- Construction of other civil engineering projects n.e.c.; Other engineering activities
O Armstrong Engineering Services Ltd is a newly incorporated private limited company registered in London, company number 17236058, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 21 February 2028, and its first CT600 is due at HMRC on 20 May 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.
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Where O Armstrong Engineering Services Ltd is registered
The registered office is in London (N1), in the Hackney local authority area, London. Show N1 7GU on a map.
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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 O Armstrong Engineering 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 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 22 Feb 2028 to 21 Mar 2028 | £150 |
| 1 to 3 months late | 22 Mar 2028 to 21 May 2028 | £375 |
| 3 to 6 months late | 22 May 2028 to 21 Aug 2028 | £750 |
| More than 6 months late | From 22 Aug 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 17236058
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 May 2026
- Registered office
- 20 Wenlock Road, London, N1 7GU
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
Other engineering activities (SIC 71129) - Year end
- 31 May (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.
- O'Reilly & O'Reilly Ltd2022
- O. Jibowu Limited2018
- Oak Paving Limited2014
- Oakwood Construction 2016 Limited2016
- Ocean Pride Limited2018
- Oculus Planning & Consulting Limited2023
- Odessa82 Ltd2023
- Office Flow Management Ltd2024
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are O Armstrong Engineering Services Ltd's accounts due?
O Armstrong Engineering Services Ltd's next accounts are due at Companies House by 21 February 2028 (in 497 days), covering the period to 31 May 2027.
When is O Armstrong Engineering 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 May 2027, due by 20 May 2028, and one for the period to 31 May 2027, due by 31 May 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is O Armstrong Engineering Services Ltd still trading?
O Armstrong Engineering 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 O Armstrong Engineering Services Ltd do?
O Armstrong Engineering Services Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990); Other engineering activities (SIC 71129).
How old is O Armstrong Engineering Services Ltd?
O Armstrong Engineering Services Ltd was incorporated on 21 May 2026, less than a year ago.
What is the penalty if O Armstrong Engineering 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 O Armstrong Engineering 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.