- Companies
- Cleaning companies
- London
- Clean Mark Group Limited
Clean Mark Group Limited
- Company number
- 16009997
- Incorporated
- 10 Oct 20242 years trading
- Registered office
- C/O RWK Goodman LLP, 69 Carter Lane, London, EC4V 5EQ
- Nature of business
- General cleaning of buildings
Clean Mark Group Limited is a 2-year-old private limited company registered in London, company number 16009997, one of 5,627 cleaning companies in London. Companies House shows its accounts as overdue: they were due on 10 October 2026.
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 Clean Mark Group Limited is registered
The registered office is in London (EC4V), in the City of London local authority area, London. Show EC4V 5EQ on a map.
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Also registered at this address
2 other companies use the same registered office as Clean Mark Group Limited.
- Cleanking LimitedCleaning companies
- Hadcliffe Properties LimitedProperty developers
What happens if Clean Mark Group Limited files late
If the accounts reach Companies House today, the late filing penalty is £150 (£300 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 11 Oct 2026 to 10 Nov 2026 | £150 |
| 1 to 3 months late | 11 Nov 2026 to 10 Jan 2027 | £375 |
| 3 to 6 months late | 11 Jan 2027 to 10 Apr 2027 | £750 |
| More than 6 months late | From 11 Apr 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 16009997
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 October 2024 (2 years ago)
- Registered office
- C/O RWK Goodman LLP, 69 Carter Lane, London, EC4V 5EQ
- Nature of business
- General cleaning of buildings (SIC 81210)
- Year end
- 31 March (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 9 October 2025
- Charges (mortgages)
- 1 outstanding of 1 registered
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.
- Clean Me Marketplace Ltd2021
- Clean Me Well Limited2023
- Clean My Solutions Limited2022
- Clean N Care Services Limited Limited2019
- Clean Nests Ltd2026
- Clean Network London Ltd2021
- Clean Path Services Ltd2026
- Clean Peony Swindon Limited2025
All cleaning companies in London · All trades in London · Cleaning companies across the UK
Frequently asked questions
When are Clean Mark Group Limited's accounts due?
Clean Mark Group Limited's accounts were due at Companies House on 10 October 2026 and the register shows them as overdue.
When is Clean Mark Group 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 9 October 2025, due by 9 October 2026, and one for the period to 31 March 2026, due by 31 March 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Clean Mark Group Limited still trading?
Clean Mark Group 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 Clean Mark Group Limited do?
Clean Mark Group Limited is registered under General cleaning of buildings (SIC 81210).
How old is Clean Mark Group Limited?
Clean Mark Group Limited was incorporated on 10 October 2024, 2 years ago.
What is the penalty if Clean Mark Group 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 Clean Mark Group 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.