- Companies
- Plumbers and heating engineers
- Portsmouth
- PJM Mechanical & Electrical Ltd
PJM Mechanical & Electrical Ltd
- Company number
- 04535254
- Incorporated
- 13 Sep 200224 years trading
- Registered office
- Lake House 2 Port Way, Port Solent, Portsmouth, Hampshire, PO6 4TY
- Nature of business
- Plumbing, heat and air-conditioning installation
PJM Mechanical & Electrical Ltd is a 24-year-old private limited company registered in Portsmouth, company number 04535254, one of 141 plumbing and heating companies in Portsmouth. 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 down £27K (-23%) on the year before, to £91K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £575K against £439K owed within a year: 1.3 times cover.
- 10 employees on average, down from 13 the year before.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2025 | £91K | £47K | £575K | £439K | 10 |
| 31 Oct 2024 | £118K | £54K | £619K | £402K | 13 |
| 31 Oct 2023 | £71K | £35K | £508K | £293K | 12 |
| 31 Oct 2022 | £102K | £50K | £561K | £302K | 12 |
| 31 Oct 2021 | £172K | £47K | £658K | £393K | 17 |
| 31 Oct 2020 | £126K | £266K | £872K | £623K | 17 |
| 31 Oct 2019 | £80K | £46K | £487K | £401K | 21 |
| 31 Oct 2018 | £142K | £37K | £523K | £432K | 21 |
| 31 Oct 2017 | £61K | £87K | £499K | £487K | 23 |
| 31 Oct 2016 | £192K | £161K | £1.3M | £1.1M |
Where PJM Mechanical & Electrical Ltd is registered
The registered office is in Portsmouth (PO6), in the Portsmouth local authority area, South East. Show PO6 4TY on a map.
Other trade companies in PO6
- Bellagio Partners LtdBuilders
- Cpenw LtdMachinery repair and installation
- Marla Brickwork & Construction LtdProperty developers
- Miracles in Metal LtdMechanics and garages
- FH Fire & Electrical LtdElectricians
- Thomcore LimitedSpecialist contractors
- JMS Southern LtdElectricians
- The Motum Group LtdSpecialist contractors
Shared registered office
55 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if PJM Mechanical & Electrical 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
- 04535254
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 September 2002 (24 years ago)
- Registered office
- Lake House 2 Port Way, Port Solent, Portsmouth, Hampshire, PO6 4TY
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 13 September 2026
- Charges (mortgages)
- 2 outstanding of 3 registered
- Previous names
- PJM Mechanical Services Limited (until 9 Nov 2015)
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Portsmouth
Other active plumbing and heating companies registered in Portsmouth.
- Plumbcure Gas and Electricals Limited2017
- Portsmouth Gas Heating Limited2021
- PPH South Ltd2015
- Prestige Plumbing (Havant) Ltd2014
- Pro Gas Southern Ltd2022
- Prospect Gas Limited2021
- Prospect Heat Solutions Limited2025
- Prospect Plumbing & Heating Ltd2023
All plumbing and heating companies in Portsmouth · All trades in Portsmouth · Plumbers and heating engineers across the UK
Frequently asked questions
When are PJM Mechanical & Electrical Ltd's accounts due?
PJM Mechanical & Electrical 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 PJM Mechanical & Electrical 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 PJM Mechanical & Electrical Ltd still trading?
PJM Mechanical & Electrical 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 PJM Mechanical & Electrical Ltd do?
PJM Mechanical & Electrical Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is PJM Mechanical & Electrical Ltd?
PJM Mechanical & Electrical Ltd was incorporated on 13 September 2002, 24 years ago.
What is the penalty if PJM Mechanical & Electrical 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 PJM Mechanical & Electrical 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.