MARSON ENGINEERING LTD
Company number 07292149 · Active · London SW2 3HZ
MARSON ENGINEERING LTD is an active private limited company (company number 07292149) incorporated on 22 June 2010, registered in London. Its registered activity is plumbing, heat and air-conditioning installation (SIC 43220). Latest micro accounts cover the period ending 31 March 2025, showing net assets of £76k, with 1 employee on average. As micro-entity accounts, no profit and loss account is filed, so turnover and profit are not public. Net assets rose 5% on the prior period (£73k).
By net assets it sits in the top quarter of 2,146 comparable companies in London (median £2,932, upper quartile £20k).
Key dates
- Incorporated
- 22 June 2010
- Next accounts due
- 31 December 2026 — in 75 days
- Confirmation statement due
- 6 July 2027 — in 262 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
Activity
- SIC 43220
- Plumbing, heat and air-conditioning installation
- Accounts type
- Micro Entity
- Size band
- Micro (Companies Act thresholds)
Financials — 2 periods on record, latest ending 31 March 2025
| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 March 2025 | £76k | — | — | £62k | — | — | 1 |
| 31 March 2024 | £73k | — | — | £50k | — | — | 1 |
- Current ratio
- 0.02 — current liabilities exceed current assets
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing; micro-entity accounts contain no profit and loss account.
Firmoscan score: 60/100 (grade C)
- +10 Positive net assets — Net assets £76,471 at 2025-03-31
- -8 Current liabilities exceed current assets — Current ratio 0.02
- +8 Established — Incorporated 2010-06-22 (16 years)
A transparent, rules-based score from filed data only: every point lists its evidence. It is not a credit rating or advice.
Ownership and control
- Mr Mariusz Krystecki — owns 75–100% of shares; holds 75–100% of voting rights; can appoint or remove directors · since 21 February 2026
- Mr Mariusz Krystecki — owns 75–100% of shares · since 6 April 2016 · ceased 21 February 2026
Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents.
Similar companies in London
Same activity (plumbing, heat and air-conditioning installation), closest in incorporation date.
- HYLAND PLUMBING LTD — London, inc. Jun 2010
- AACRIGOW LIMITED — London, inc. Jun 2010
- CONCEPT HEATING & RENEWABLES LIMITED — East Ham, inc. Jun 2010
- PLT GROUP LIMITED — London, inc. Jun 2010
- NEW SYSTEM PLUMBERS LIMITED — London, inc. Jun 2010
- ADG PLUMBING & HEATING LIMITED — London, inc. Jul 2010
Reminders for MARSON ENGINEERING LTD
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.