−£21k
−1793%vs Oct 2024Active12930047Private limited companySouthsea
GDM PLUMBING & HEATING SERVICES LTD
Significant control: Guy Derek Martin (75–100%)
From public filings as at 31 Aug 2026; may contain errors or be out of date. Verify at Companies House · Terms
Watch this company
Get an email when Companies House records a change for Gdm Plumbing & Heating Services Ltd: status, filings, accounts, officers or owners. Free.
Not live yet: alerts start by 15 December 2026. We store your email and this company number only, for these alerts. If alerts don’t launch, we tell you and delete your address. Privacy
Coming soon · product and service lists
What does Gdm Plumbing & Heating Services Ltd 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.
One email, only about this. If we don’t launch within 60 days we’ll tell you. Privacy
01
Summary
GDM PLUMBING & HEATING SERVICES LTD is an active private limited company (company number 12930047) incorporated on 5 October 2020, registered in Southsea. Its registered activity is plumbing, heat and air-conditioning installation (SIC 43220). Latest micro accounts cover the period ending 31 October 2025, showing net assets of −£21k, with 2 employees on average. As micro-entity accounts, no profit and loss account is filed, so turnover and profit are not public. Net assets fell 1793% on the prior period (£1,224).
Peer position · net assets
By net assets it sits in the bottom quarter of 573 comparable companies in Portsmouth (median £4,669, upper quartile £26k).
02
Ownership and control
- Mr Guy Derek Martin
- owns 75–100% of shares
- holds 75–100% of voting rights
- can appoint or remove directors
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
- 5 October 20206 yrs ago
- Next accounts due
- 31 July 2027in 276 days
- Confirmation statement due
- 19 October 2027in 356 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
- Micro Entity
- Size band
- MicroCompanies Act thresholds
05
Financials
Not reported
Not disclosed
2
No changevs Oct 2024| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 October 2025 | −£21k | — | — | — | — | — | 2 |
| 31 October 2024 | £1,224 | — | — | — | — | — | 2 |
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.
06
Filing and accounts signals
- Net assets below zeroNet assets £-20,718 at 31 October 2025
- Net assets down 25% or more on the prior period-1792.6% vs prior period
- Incorporated five or more years agoIncorporated 5 October 2020
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
- Confirmation statement duein 356 days
- Next accounts duein 276 days
- Accounts period endNet liabilities £21k · micro accounts
- Accounts period endNet assets £1,224 · micro accounts
- Incorporated
08
Similar companies in Portsmouth
- SOUTHDOWNS GAS LTDFareham · inc. Oct 2020
- JD GRANT PLUMBING & HEATING LIMITEDFareham · inc. Oct 2020
- BOYD GAS AND HEATING LIMITEDWaterlooville · inc. Sept 2020
- SOUTH COAST HEATING INSTALLATIONS LTDWaterlooville · inc. Sept 2020
- JB GAS SERVICES IOW LTDCowes · inc. Sept 2020
- BOSHAM GAS LTDChichester · inc. Sept 2020
All companies incorporated on 5 October 2020 · in Oct 2020.
09
Reminders for GDM PLUMBING & HEATING SERVICES LTD
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.