- Companies
- Specialist contractors
- London
- Stronghold Projects Ltd
Stronghold Projects Ltd
- Company number
- 16537212
- Incorporated
- 23 Jun 20251 year trading
- Registered office
- C/O Hard Hat Group, 320 City Road, London, EC1V 2NZ
- Nature of business
- Other specialised construction activities n.e.c.
Stronghold Projects Ltd is a 1-year-old private limited company registered in London, company number 16537212, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 23 March 2027, and its first CT600 is due at HMRC on 22 June 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 Stronghold Projects Ltd is registered
The registered office is in London (EC1V), in the Islington local authority area, London. Show EC1V 2NZ on a map.
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Shared registered office
67 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 Stronghold Projects 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 23 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 24 Mar 2027 to 23 Apr 2027 | £150 |
| 1 to 3 months late | 24 Apr 2027 to 23 Jun 2027 | £375 |
| 3 to 6 months late | 24 Jun 2027 to 23 Sep 2027 | £750 |
| More than 6 months late | From 24 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 16537212
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 June 2025 (1 year ago)
- Registered office
- C/O Hard Hat Group, 320 City Road, London, EC1V 2NZ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 June (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 26 June 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in London
Other active specialist construction companies registered in London.
- Stroyant Ltd2017
- Structorn Ltd2025
- Structura Konsult Ltd2025
- Structural Alterations Ltd2018
- Structural Waterproofing Specialists Ltd2026
- Structure Property Services Ltd2023
- Structuremode Limited2007
- Struxel Limited2023
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Stronghold Projects Ltd's accounts due?
Stronghold Projects Ltd's next accounts are due at Companies House by 23 March 2027 (in 161 days), covering the period to 30 June 2026.
When is Stronghold Projects 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 22 June 2026, due by 22 June 2027, and one for the period to 30 June 2026, due by 30 June 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Stronghold Projects Ltd still trading?
Stronghold Projects 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 Stronghold Projects Ltd do?
Stronghold Projects Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Stronghold Projects Ltd?
Stronghold Projects Ltd was incorporated on 23 June 2025, 1 year ago.
What is the penalty if Stronghold Projects 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 Stronghold Projects 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.