- Companies
- Specialist contractors
- Thornton Heath
- Dark Diamond Solutions Ltd
Dark Diamond Solutions Ltd
- Company number
- 10636365
- Incorporated
- 23 Feb 20179 years trading
- Registered office
- 39 Springfield Road, Thornton Heath, CR7 8DZ
- Nature of business
- Other specialised construction activities n.e.c.; Other engineering activities
Dark Diamond Solutions Ltd is a 9-year-old private limited company registered in Thornton Heath, company number 10636365, one of 21 specialist construction companies in Thornton Heath. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets down £750 (-6.7%) on the year before, to £10K.
- Net assets rose in 3 of 7 year-on-year comparisons on record.
- Current assets of £9,304 against £200 owed within a year: more than 10 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 8 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | £10K | £0 | £9,304 | £200 | 1 |
| 31 May 2024 | £11K | £1,520 | £18K | £8,651 | 1 |
| 31 May 2023 | £14K | £2,337 | £15K | £3,074 | 1 |
| 31 May 2022 | £32K | £21K | £44K | £13K | 1 |
| 31 May 2021 | £17K | £35K | 2 | ||
| 29 Feb 2020 | £19K | £49K | 2 | ||
| 28 Feb 2019 | £5,022 | £29K | 2 | ||
| 28 Feb 2018 | £2,970 | £17K | £32K | £13K |
Who runs and owns Dark Diamond Solutions Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| J*** B*** | Director | Feb 2017 |
1 former officer
| Name | Role | Appointed | Left |
|---|---|---|---|
| S*** D*** | Director | Feb 2017 | Nov 2025 |
Person with significant control
Where Dark Diamond Solutions Ltd is registered
The registered office is in Thornton Heath (CR7), in the Croydon local authority area, London. Show CR7 8DZ on a map.
Other trade companies in CR7
- Ib Air Conditioning LimitedPlumbers and heating engineers
- Gold Carpet Cleaning Services LtdCleaning companies
- Azad Auto LtdMechanics and garages
- Tota Steel LtdFinishing trades
- Survey Stream Property Services LtdFacilities management
- Saunders Mechanics LtdMechanics and garages
- SR Gas London LimitedPlumbers and heating engineers
- Prestige Auto Repair & Body Works LtdMechanics and garages
What happens if Dark Diamond 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 10636365
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 February 2017 (9 years ago)
- Registered office
- 39 Springfield Road, Thornton Heath, CR7 8DZ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Other engineering activities (SIC 71129) - Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 28 December 2025
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 Thornton Heath
Other active specialist construction companies registered in Thornton Heath.
- Emporium Estimating Consultants Ltd2016
- First Rate Group Limited2019
- GCSM Logistics Ltd2026
- Handyman Pro Max Ltd2026
- HK Construction Services Ltd2025
- Joachinmac Ltd2018
- Lester Lift Services Limited1973
- Lokai Construction Ltd2024
All specialist construction companies in Thornton Heath · All trades in Thornton Heath · Specialist contractors across the UK
Frequently asked questions
When are Dark Diamond Solutions Ltd's accounts due?
Dark Diamond Solutions Ltd's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is Dark Diamond Solutions Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Dark Diamond Solutions Ltd still trading?
Dark Diamond 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 Dark Diamond Solutions Ltd do?
Dark Diamond Solutions Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999); Other engineering activities (SIC 71129).
How old is Dark Diamond Solutions Ltd?
Dark Diamond Solutions Ltd was incorporated on 23 February 2017, 9 years ago.
Who runs Dark Diamond Solutions Ltd?
Dark Diamond Solutions Ltd has 1 active director, the longest-serving appointed in Feb 2017. Their names and service addresses are on the Companies House register.
Who owns Dark Diamond Solutions Ltd?
One person or company has significant control of Dark Diamond Solutions Ltd: an individual (owns 25% to 50% of the shares).
What is the penalty if Dark Diamond 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 Dark Diamond 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.