- Company number
- 12924153
- Incorporated
- 2 Oct 20206 years trading
- Registered office
- 8 Stewartsby Close, London, N18 1AN
- Nature of business
- Construction of commercial buildings
Mitko Marinov Ltd is a 6-year-old private limited company registered in London, company number 12924153, one of 12,075 building contractors in London. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 unchanged on the year before, at £100.
- Net assets rose in 0 of 4 year-on-year comparisons on record.
- 1 employee on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2025 | £100 | £100 | 1 | ||
| 31 Oct 2024 | £100 | £608 | £508 | 1 | |
| 31 Oct 2023 | £100 | £636 | £536 | 1 | |
| 31 Oct 2022 | £100 | £100 | £0 | 1 | |
| 31 Oct 2021 | £100 | £495 | £395 | 1 |
Where Mitko Marinov Ltd is registered
The registered office is in London (N18), in the Enfield local authority area, London. Show N18 1AN on a map.
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What happens if Mitko Marinov 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 31 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 12924153
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 October 2020 (6 years ago)
- Registered office
- 8 Stewartsby Close, London, N18 1AN
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 1 October 2025
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in London
Other active building contractors registered in London.
- Mitra Construction Ltd2025
- Mivar Ltd2021
- Mizan Construction & Consultancy Ltd2021
- MJ Build & Design Limited2026
- MJ Builders Solution Ltd2025
- MJ Carpenters Ltd2014
- MJ Construction & Bros Ltd2020
- MJ Construction and Design Limited2015
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are Mitko Marinov Ltd's accounts due?
Mitko Marinov Ltd's next accounts are due at Companies House by 31 July 2027 (in 291 days), covering the period to 31 October 2026.
When is Mitko Marinov Ltd's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is Mitko Marinov Ltd still trading?
Mitko Marinov 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 Mitko Marinov Ltd do?
Mitko Marinov Ltd is registered under Construction of commercial buildings (SIC 41201).
How old is Mitko Marinov Ltd?
Mitko Marinov Ltd was incorporated on 2 October 2020, 6 years ago.
What is the penalty if Mitko Marinov 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 Mitko Marinov 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.