- Companies
- Plumbers and heating engineers
- Southampton
- City Plumbing & Heating Southern Ltd
City Plumbing & Heating Southern Ltd
- Company number
- 13300981
- Incorporated
- 29 Mar 20215 years trading
- Registered office
- 28 Alexandra Road, Hedge End, Southampton, SO30 0DP
- Nature of business
- Plumbing, heat and air-conditioning installation
City Plumbing & Heating Southern Ltd is a 5-year-old private limited company registered in Southampton, company number 13300981, one of 246 plumbing and heating companies in Southampton. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 up £2,118 (+10.9%) on the year before, to £22K.
- Net assets rose in 3 of 3 year-on-year comparisons on record.
- 2 employees on average, up from 1 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 Mar 2025 | £22K | £81K | 2 | ||
| 31 Mar 2024 | £19K | £25K | £0 | 1 | |
| 31 Mar 2023 | £17K | £50K | £34K | 2 | |
| 31 Mar 2022 | £10K | £32K | £23K | 1 |
Where City Plumbing & Heating Southern Ltd is registered
The registered office is in Southampton (SO30), in the Eastleigh local authority area, South East. Show SO30 0DP on a map.
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What happens if City Plumbing & Heating Southern 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 13300981
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 March 2021 (5 years ago)
- Registered office
- 28 Alexandra Road, Hedge End, Southampton, SO30 0DP
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 28 March 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.
- Climate Change Services Ltd2020
- Climate Gas Ltd2012
- Coles Plumbing and Heating Ltd2025
- Complete Solutions CS UK Ltd2017
- Cool Enterprises Ltd2026
- Cool4Heat Solutions Ltd2024
- Cosy Glow Heating Limited2016
- Crown Heating & Plumbing Limited2016
All plumbing and heating companies in Southampton · All trades in Southampton · Plumbers and heating engineers across the UK
Frequently asked questions
When are City Plumbing & Heating Southern Ltd's accounts due?
City Plumbing & Heating Southern Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is City Plumbing & Heating Southern Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is City Plumbing & Heating Southern Ltd still trading?
City Plumbing & Heating Southern 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 City Plumbing & Heating Southern Ltd do?
City Plumbing & Heating Southern Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is City Plumbing & Heating Southern Ltd?
City Plumbing & Heating Southern Ltd was incorporated on 29 March 2021, 5 years ago.
What is the penalty if City Plumbing & Heating Southern 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 City Plumbing & Heating Southern 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.