- Companies
- Specialist contractors
- London
- Diamant Solutions Ltd
Diamant Solutions Ltd
- Company number
- 16897347
- Incorporated
- 8 Dec 2025
- Registered office
- Office 6 1ST Floor, Sutherland House, 70-78 West Hendon Broadway, London, NW9 7BT
- Nature of business
- Other specialised construction activities n.e.c.; Information technology consultancy activities; Management consultancy activities other than financial management; Other business support service activities n.e.c.
Diamant Solutions Ltd is a newly incorporated private limited company registered in London, company number 16897347, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 8 September 2027, and its first CT600 is due at HMRC on 7 December 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 Diamant Solutions Ltd is registered
The registered office is in London (NW9), in the Barnet local authority area, London. Show NW9 7BT on a map.
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What happens if Diamant 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 8 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 9 Sep 2027 to 8 Oct 2027 | £150 |
| 1 to 3 months late | 9 Oct 2027 to 8 Dec 2027 | £375 |
| 3 to 6 months late | 9 Dec 2027 to 8 Mar 2028 | £750 |
| More than 6 months late | From 9 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 16897347
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 December 2025
- Registered office
- Office 6 1ST Floor, Sutherland House, 70-78 West Hendon Broadway, London, NW9 7BT
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Information technology consultancy activities (SIC 62020)
Management consultancy activities other than financial management (SIC 70229)
Other business support service activities n.e.c. (SIC 82990) - Year end
- 31 December (accounting reference date)
- Accounts type
- No accounts filed yet
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.
- Diamen Limited2018
- Diamond Handyman London Ltd2016
- Diamond Hard Property Company Limited1994
- Diamond Set and Scenic Ltd2026
- Digital (Ceilings & Partitions) Limited2005
- Digital Site Solutions Ltd2025
- Digital Twin Bim Services Ltd2025
- Dignity Solutions Limited2014
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Diamant Solutions Ltd's accounts due?
Diamant Solutions Ltd's next accounts are due at Companies House by 8 September 2027 (in 330 days), covering the period to 31 December 2026.
When is Diamant 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 7 December 2026, due by 7 December 2027, and one for the period to 31 December 2026, due by 31 December 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Diamant Solutions Ltd still trading?
Diamant 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 Diamant Solutions Ltd do?
Diamant Solutions Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999); Information technology consultancy activities (SIC 62020); Management consultancy activities other than financial management (SIC 70229); Other business support service activities n.e.c. (SIC 82990).
How old is Diamant Solutions Ltd?
Diamant Solutions Ltd was incorporated on 8 December 2025, less than a year ago.
What is the penalty if Diamant 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 Diamant 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.