- Companies
- Builders
- Southampton
- SMH Plumbing and Heating Ltd
SMH Plumbing and Heating Ltd
- Company number
- 12632239
- Incorporated
- 29 May 20206 years trading
- Registered office
- Unit 20, the Sidings Hound Road, Netley Abbey, Southampton, Hampshire, SO31 5QA
- Nature of business
- Construction of domestic buildings; Plumbing, heat and air-conditioning installation
SMH Plumbing and Heating Ltd is a 6-year-old private limited company registered in Southampton, company number 12632239, one of 491 building contractors in Southampton. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 £45K (-58.4%) on the year before, to £32K.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £351K against £317K owed within a year: 1.1 times cover.
- 6 employees on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | £32K | £0 | £351K | £317K | 6 |
| 31 May 2024 | £76K | £21K | £301K | £257K | 6 |
| 31 May 2023 | £50K | £22K | £114K | £110K | 4 |
| 31 May 2022 | £6,526 | £5,991 | £63K | £77K | 5 |
| 31 May 2021 | £4,453 | £15K | £43K | £48K | 2 |
Where SMH Plumbing and Heating Ltd is registered
The registered office is in Southampton (SO31), in the Eastleigh local authority area, South East. Show SO31 5QA on a map.
Other trade companies in SO31
- MNC Cleaning LtdCleaning companies
- Mars Eng. LtdMachinery repair and installation
- Amc Plumbing and Heating LtdPlumbers and heating engineers
- Pride & Bloom LtdLandscapers and gardeners
- Hampshire Heating and Cooling LtdPlumbers and heating engineers
- Kelpie Landscape & Build LtdFinishing trades
- FSC Facilities Services LtdInstallers
- Fitton & Redding Services LimitedMechanics and garages
What happens if SMH Plumbing and Heating 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 12632239
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 May 2020 (6 years ago)
- Registered office
- Unit 20, the Sidings Hound Road, Netley Abbey, Southampton, Hampshire, SO31 5QA
- Nature of business
- Construction of domestic buildings (SIC 41202)
Plumbing, heat and air-conditioning installation (SIC 43220) - Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 28 May 2026
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Southampton
Other active building contractors registered in Southampton.
- Smolin Services Ltd2026
- So31 Construction Ltd2018
- Solent Bespoke Projects Limited2025
- Solentum Limited2026
- Solid Build Contractors Ltd2021
- Sonix Ltd2026
- Soton Construction Ltd2018
- South Coast Block and Beam Floors Ltd2026
All building contractors in Southampton · All trades in Southampton · Builders across the UK
Frequently asked questions
When are SMH Plumbing and Heating Ltd's accounts due?
SMH Plumbing and Heating Ltd's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is SMH Plumbing and Heating Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is SMH Plumbing and Heating Ltd still trading?
SMH Plumbing and Heating 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 SMH Plumbing and Heating Ltd do?
SMH Plumbing and Heating Ltd is registered under Construction of domestic buildings (SIC 41202); Plumbing, heat and air-conditioning installation (SIC 43220).
How old is SMH Plumbing and Heating Ltd?
SMH Plumbing and Heating Ltd was incorporated on 29 May 2020, 6 years ago.
What is the penalty if SMH Plumbing and Heating 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 SMH Plumbing and Heating 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.