- Companies
- Plumbers and heating engineers
- Southampton
- MH3 Plumbing and Heating (Southern) Limited
MH3 Plumbing and Heating (Southern) Limited
- Company number
- 09817046
- Incorporated
- 9 Oct 201511 years trading
- Registered office
- 15 Way Field Close, Botley, Southampton, SO32 2GD
- Nature of business
- Plumbing, heat and air-conditioning installation
MH3 Plumbing and Heating (Southern) Limited is a 11-year-old private limited company registered in Southampton, company number 09817046, one of 246 plumbing and heating companies in Southampton. 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 £6,220 (-13.4%) on the year before, to £40K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £63K against £49K owed within a year: 1.3 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 | £40K | £31K | £63K | £49K | 0 |
| 31 Oct 2024 | £46K | £65K | £113K | £85K | 3 |
| 31 Oct 2023 | £43K | £52K | £83K | £54K | 3 |
| 31 Oct 2022 | £26K | £38K | £60K | £35K | 3 |
| 31 Oct 2021 | £13K | £33K | £51K | £23K | 2 |
| 31 Oct 2020 | £16K | £42K | £54K | £16K | 1 |
| 31 Oct 2019 | £20K | £40K | £47K | £28K | 1 |
| 31 Oct 2018 | £15K | £42K | £53K | £40K | 1 |
| 31 Oct 2017 | £10K | £35K | £51K | £41K | 1 |
| 31 Oct 2016 | £5,692 | £12K | £19K | £15K | 1 |
Who runs and owns MH3 Plumbing and Heating (Southern) Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| M*** H*** | Director | Oct 2015 |
| A*** H*** | Secretary | Oct 2015 |
People with significant control (2)
Where MH3 Plumbing and Heating (Southern) Limited is registered
The registered office is in Southampton (SO32), in the Eastleigh local authority area, South East. Show SO32 2GD on a map.
Other trade companies in SO32
- J. Green Plastering LtdPlasterers
- D&A Groom LtdInstallers
- Clearline Builds LtdBuilders
- Bumpers to Boost Customs LimitedMotor traders
- Chambers Composites LtdSpecialist contractors
- Gilltown Developments LimitedProperty developers
- Woodpabst Developments LimitedProperty developers
- Htwagroup LtdProperty developers
What happens if MH3 Plumbing and Heating (Southern) 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 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
- 09817046
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 October 2015 (11 years ago)
- Registered office
- 15 Way Field Close, Botley, Southampton, SO32 2GD
- 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
- 6 September 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 Southampton
Other active plumbing and heating companies registered in Southampton.
- Michael Todd Plumbing & Heating Ltd2006
- Mikes Plumbing & Heating Ltd2009
- Morrison Plumbing and Heating Ltd2023
- Morts Plumbing & Heating Limited2017
- MPH South Ltd2026
- MPK Plumbing & Gas Services Limited2016
- MTV Plumbing and Heating Ltd2019
- My New Bathroom Ltd2021
All plumbing and heating companies in Southampton · All trades in Southampton · Plumbers and heating engineers across the UK
Frequently asked questions
When are MH3 Plumbing and Heating (Southern) Limited's accounts due?
MH3 Plumbing and Heating (Southern) Limited's next accounts are due at Companies House by 31 July 2027 (in 291 days), covering the period to 31 October 2026.
When is MH3 Plumbing and Heating (Southern) Limited'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 MH3 Plumbing and Heating (Southern) Limited still trading?
MH3 Plumbing and Heating (Southern) 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 MH3 Plumbing and Heating (Southern) Limited do?
MH3 Plumbing and Heating (Southern) Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is MH3 Plumbing and Heating (Southern) Limited?
MH3 Plumbing and Heating (Southern) Limited was incorporated on 9 October 2015, 11 years ago.
Who runs MH3 Plumbing and Heating (Southern) Limited?
MH3 Plumbing and Heating (Southern) Limited has 1 active director, the longest-serving appointed in Oct 2015. Their names and service addresses are on the Companies House register.
Who owns MH3 Plumbing and Heating (Southern) Limited?
2 people or companies have significant control of MH3 Plumbing and Heating (Southern) Limited: an individual (owns 25% to 50% of the shares); an individual (owns 75% or more of the shares).
What is the penalty if MH3 Plumbing and Heating (Southern) 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 MH3 Plumbing and Heating (Southern) 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.