- Companies
- Plumbers and heating engineers
- Ashton-under-Lyne
- Poseidon Mechanical Limited
Poseidon Mechanical Limited
- Company number
- 13819086
- Incorporated
- 28 Dec 20214 years trading
- Registered office
- 36 Leech Avenue, Ashton-under-Lyne, OL6 8HH
- Nature of business
- Plumbing, heat and air-conditioning installation
Poseidon Mechanical Limited is a 4-year-old private limited company registered in Ashton-under-Lyne, company number 13819086, one of 47 plumbing and heating companies in Ashton-under-Lyne. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 £14K (-56.3%) on the year before, to £11K.
- Net assets rose in 1 of 3 year-on-year comparisons on record.
- Current assets of £15K against £10K owed within a year: 1.5 times cover.
- 2 employees on average, up from -2 the year before.
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £11K | £15K | £10K | 2 | |
| 31 Dec 2024 | £25K | £26K | £8,578 | -2 | |
| 31 Dec 2023 | £30K | £23K | £2,768 | -2 | |
| 31 Dec 2022 | £8,593 | £5,861 | £3,348 | -2 |
Where Poseidon Mechanical Limited is registered
The registered office is in Ashton-under-Lyne (OL6), in the Tameside local authority area, North West. Show OL6 8HH on a map.
Other trade companies in OL6
- Auzio Traders LtdMotor traders
- Nuova Era Installs LimitedPlasterers
- First Line Motors (NW) LtdMotor traders
- Aul Site Solutions LtdCivil engineering
- Buddy's Bathrooms LtdPlumbers and heating engineers
- Bridgehouse Projects NW LimitedProperty developers
- Alu MS Facade Systems UK LimitedGlaziers
- JW Truefix Building Care LtdBuilders
Also registered at this address
11 other companies use the same registered office as Poseidon Mechanical Limited.
- Access and Maintenance LtdSpecialist contractors
- Active Glaze LtdGlaziers
- Buddy's Bathrooms LtdPlumbers and heating engineers
- D G Electrical Services LtdElectricians
- E & B Barlow LimitedElectricians
- Hse Shield LtdBuilders
- JBS Electrical Contractors LtdElectricians
- JJ Access Solutions LtdSpecialist contractors
- John Rhodes Cleaning Services LtdCleaning companies
- JT Excavations LtdInstallers
- Lomas Gas Services LtdPlumbers and heating engineers
What happens if Poseidon Mechanical Limited 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 13819086
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 December 2021 (4 years ago)
- Registered office
- 36 Leech Avenue, Ashton-under-Lyne, OL6 8HH
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 27 December 2025
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 Ashton-under-Lyne
Other active plumbing and heating companies registered in Ashton-under-Lyne.
- PTW Project Management Limited2017
- R S Cooling Limited2016
- Robert John Parry Limited2015
- Shadow Plumbing and Heating Ltd2023
- Smartway Energy Ltd2024
- Starr Plumbing and Heating Limited2021
- TL Plumbing & Heating Ltd2025
- Total Care Gas Heating Plumbing Ltd2020
All plumbing and heating companies in Ashton-under-Lyne · All trades in Ashton-under-Lyne · Plumbers and heating engineers across the UK
Frequently asked questions
When are Poseidon Mechanical Limited's accounts due?
Poseidon Mechanical Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Poseidon Mechanical Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Poseidon Mechanical Limited still trading?
Poseidon Mechanical Limited 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 Poseidon Mechanical Limited do?
Poseidon Mechanical Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Poseidon Mechanical Limited?
Poseidon Mechanical Limited was incorporated on 28 December 2021, 4 years ago.
What is the penalty if Poseidon Mechanical Limited 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 Poseidon Mechanical Limited 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.