- Companies
- Plumbers and heating engineers
- Fareham
- M J Downer Ltd
M J Downer Ltd
- Company number
- 03308145
- Incorporated
- 27 Jan 199729 years trading
- Registered office
- Unit 5 Crompton Way, Segensworth West, Fareham, PO15 5SS
- Nature of business
- Plumbing, heat and air-conditioning installation
M J Downer Ltd is a 29-year-old private limited company registered in Fareham, company number 03308145, one of 119 plumbing and heating companies in Fareham. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 £1,350 (-8.1%) on the year before, to £15K.
- Net assets rose in 2 of 9 year-on-year comparisons on record.
- Current assets of £22K against £41K owed within a year: 0.5 times cover.
- 1 employee on average, down from 2 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 |
|---|---|---|---|---|---|
| 30 Nov 2025 | £15K | £22K | £41K | 1 | |
| 30 Nov 2024 | £17K | £26K | £48K | 2 | |
| 30 Nov 2023 | £19K | £34K | £60K | 2 | |
| 30 Nov 2022 | £21K | £30K | £60K | 1 | |
| 30 Nov 2021 | £20K | £28K | 1 | ||
| 30 Nov 2020 | £24K | £22K | £58K | 1 | |
| 30 Nov 2019 | £32K | £15K | £61K | 1 | |
| 30 Nov 2018 | £32K | £15K | £64K | ||
| 30 Nov 2017 | £40K | £15K | £59K | ||
| 30 Nov 2016 | -£47K | £19K | £70K |
Where M J Downer Ltd is registered
The registered office is in Fareham (PO15), in the Fareham local authority area, South East. Show PO15 5SS on a map.
Other trade companies in PO15
- 3Di Climate LimitedPlumbers and heating engineers
- Epvaleting LtdCleaning companies
- Climatiq LtdPlumbers and heating engineers
- JC Heating LtdPlumbers and heating engineers
- True Harts Construction LtdBuilders
- Ecoairfit LtdPlumbers and heating engineers
- Goodmotorcompany LtdMotor traders
- Mays Environmental Plant Hire LtdCivil engineering
Also registered at this address
5 other companies use the same registered office as M J Downer Ltd.
- Crown Developments (Winchester) LtdInstallers
- Flint Developments '12 LimitedProperty developers
- Ordnance Property LtdBuilders
- Rank Developments LtdProperty developers
- SRS Project Services LtdSpecialist contractors
What happens if M J Downer 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 03308145
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 27 January 1997 (29 years ago)
- Registered office
- Unit 5 Crompton Way, Segensworth West, Fareham, PO15 5SS
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 27 January 2026
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 Fareham
Other active plumbing and heating companies registered in Fareham.
- Manser Heating & Plumbing Ltd2024
- Mark Ballard Limited2001
- McCool Engineering Ltd2025
- Mike Richardson Plumbing Ltd2025
- Milman Contracts Ltd2025
- MKG Building Services Ltd2016
- Moore Refrigeration & Air Conditioning Ltd2015
- MP Heating and Plumbing Solutions Ltd2020
All plumbing and heating companies in Fareham · All trades in Fareham · Plumbers and heating engineers across the UK
Frequently asked questions
When are M J Downer Ltd's accounts due?
M J Downer Ltd's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is M J Downer Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is M J Downer Ltd still trading?
M J Downer 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 M J Downer Ltd do?
M J Downer Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is M J Downer Ltd?
M J Downer Ltd was incorporated on 27 January 1997, 29 years ago.
What is the penalty if M J Downer 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 M J Downer 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.