£639k
+26%vs Jun 2024Active03146000Private limited companyLondon
STONEMARK ENGINEERING LIMITED
Significant control: John Porthouse (50–75%), John Porthouse (75–100%) and 1 more
From public filings as at 31 Aug 2026; may contain errors or be out of date. Verify at Companies House · Terms
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What does Stonemark Engineering Limited sell?
Registered activity: Plumbing, heat and air-conditioning installation (SIC 43220). We’re building product and service lists for UK companies. Get this one when it’s ready.
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01
Summary
STONEMARK ENGINEERING LIMITED is an active private limited company (company number 03146000) incorporated on 15 January 1996, registered in London. Its registered activity is plumbing, heat and air-conditioning installation (SIC 43220). Latest small accounts cover the period ending 30 June 2025, showing net assets of £639k and cash of £628k, with 2 employees on average. Net assets rose 26% on the prior period (£508k).
Peer position · net assets
By net assets it sits in the top quarter of 2,146 comparable companies in London (median £2,932, upper quartile £20k).
02
Ownership and control
- John Porthouse
- owns 50–75% of shares
- holds 50–75% of voting rights
- can appoint or remove directors
- John Porthouse
- owns 75–100% of shares
- holds 75–100% of voting rights
- can appoint or remove directors
- Mr Neil Kevin Harrod
- owns 25–50% of shares
- holds 25–50% of voting rights
Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents. Directors and secretaries: see the officers list at Companies House.
03
Key dates
- Incorporated
- 15 January 199630 yrs ago
- Next accounts due
- 30 March 2027in 156 days
- Confirmation statement due
- 29 January 2027in 96 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
04
Activity
- SIC 43220
- Plumbing, heat and air-conditioning installation
- Accounts type
- Total Exemption Full
- Size band
- MicroCompanies Act thresholds
05
Financials
£628k
+37%vs Jun 2024Not reported
2
No changevs Jun 2024| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 30 June 2025 | £639k | £628k | £94k | £111k | — | — | 2 |
| 30 June 2024 | £508k | £457k | £132k | £98k | — | — | 2 |
Current ratio6.53Current assets ÷ creditors within one year
Cash per employee£314kCash ÷ average employees
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing.
06
Filing and accounts signals
- Net assets above zeroNet assets £638,501 at 30 June 2025
- Net assets up 10% or more on the prior period+25.8% vs prior period
- Current assets at least 1.5× creditors within one yearCurrent ratio 6.53
- Cash at bank of £50,000 or moreCash £627,592
- Incorporated five or more years agoIncorporated 15 January 1996
Neutral facts read from the register and filed accounts, each with its evidence. They are not a rating, a prediction or advice, and may be incomplete or out of date. How each signal is derived.
07
Timeline
- Next accounts duein 156 days
- Confirmation statement duein 96 days
- Accounts period endNet assets £639k · small accounts
- Accounts period endNet assets £508k · small accounts
- Incorporated
08
Similar companies in London
- SURESERVE COMPLIANCE CENTRAL LIMITEDLondon · inc. May 1996
- M ROGERSON LIMITEDLondon · inc. Sept 1995
- AIRCON LONDON LIMITEDLondon · inc. Mar 1995
- CENTRAL EMERGENCY SERVICES LTDinc. Dec 1996
- PERKINS REFRIGERATION LIMITEDLondon · inc. Feb 1995
- AIRTREND LIMITEDLondon · inc. Feb 1997
All companies incorporated on 15 January 1996 · in Jan 1996.
09
Reminders for STONEMARK ENGINEERING LIMITED
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.