- Companies
- Cleaning companies
- London
- Black Diamond London Limited
Black Diamond London Limited
- Company number
- 12344447
- Incorporated
- 2 Dec 20196 years trading
- Registered office
- Flat 2, Lavender Court, 1 Fallowfields Drive, London, N12 0TA
- Nature of business
- Other cleaning services
Black Diamond London Limited is a 6-year-old private limited company registered in London, company number 12344447, one of 5,627 cleaning companies in London. Companies House shows its accounts as overdue: they were due on 2 September 2021.
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 Black Diamond London Limited is registered
The registered office is in London (N12), in the Barnet local authority area, London. Show N12 0TA on a map.
Other trade companies in N12
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- Mael Property Services LtdFinishing trades
- Horizon Constructors LtdProperty developers
- Alfawine Group LimitedFinishing trades
- Sam Motors Group LimitedMotor traders
- Heating on Demand LtdPlumbers and heating engineers
- Premium Electrical LtdElectricians
- Amaiya Sparks LtdCleaning companies
What happens if Black Diamond London Limited files late
If the accounts reach Companies House today, the late filing penalty is £1,500 (£3,000 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 3 Sep 2021 to 2 Oct 2021 | £150 |
| 1 to 3 months late | 3 Oct 2021 to 2 Dec 2021 | £375 |
| 3 to 6 months late | 3 Dec 2021 to 2 Mar 2022 | £750 |
| More than 6 months late | From 3 Mar 2022 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2022 | £200 |
| 3 months late | 31 Mar 2022 | another £200 |
| 6 months late | 30 Jun 2022 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 2022 | 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
- 12344447
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 December 2019 (6 years ago)
- Registered office
- Flat 2, Lavender Court, 1 Fallowfields Drive, London, N12 0TA
- Nature of business
- Other cleaning services (SIC 81299)
- Year end
- 31 December (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 1 December 2020
Filing notes for cleaning companies
Cleaning companies are often staff-heavy, so wages, pension contributions and the employment allowance all show up in the accounts.
Similar companies in London
Other active cleaning companies registered in London.
- Black Pearl Cleaning Services Limited2025
- Black Tbilisi Ltd2025
- Blackdiamondelitecleaning Ltd2026
- Blackglovesservices Ltd2025
- Blanc Elite Ltd2026
- Blanco Clean Ltd2026
- Blanko Diamond Ltd2013
- Bleachy Limited2026
All cleaning companies in London · All trades in London · Cleaning companies across the UK
Frequently asked questions
When are Black Diamond London Limited's accounts due?
Black Diamond London Limited's accounts were due at Companies House on 2 September 2021 and the register shows them as overdue.
When is Black Diamond London Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 1 December 2020, due by 1 December 2021, and one for the period to 31 December 2020, due by 31 December 2021. Corporation tax is payable 9 months and 1 day after the end of each.
Is Black Diamond London Limited still trading?
Black Diamond London Limited is listed as active on the Companies House register (checked 12 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 Black Diamond London Limited do?
Black Diamond London Limited is registered under Other cleaning services (SIC 81299).
How old is Black Diamond London Limited?
Black Diamond London Limited was incorporated on 2 December 2019, 6 years ago.
What is the penalty if Black Diamond London Limited 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 Black Diamond London Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.