- Companies
- Plumbers and heating engineers
- London
- South Flow Plumbing & Heating Limited
South Flow Plumbing & Heating Limited
- Company number
- 16421791
- Incorporated
- 30 Apr 20251 year trading
- Registered office
- Eighth Floor 6 New Street Square, New Fetter Lane, London, EC4A 3AQ
- Nature of business
- Plumbing, heat and air-conditioning installation
South Flow Plumbing & Heating Limited is a 1-year-old private limited company registered in London, company number 16421791, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 31 January 2027, and its first CT600 is due at HMRC on 29 April 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where South Flow Plumbing & Heating Limited is registered
The registered office is in London (EC4A), in the City of London local authority area, London. Show EC4A 3AQ on a map.
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Also registered at this address
5 other companies use the same registered office as South Flow Plumbing & Heating Limited.
- Ejz Property LtdProperty developers
- Jayacee Developments LimitedProperty developers
- Square One Decorating & Plastering LimitedPlasterers
- Square One Land & Developments LimitedProperty developers
- Villa Peduzzi Ground Floor LimitedBuilders
What happens if South Flow Plumbing & Heating 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 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2027 to 28 Feb 2027 | £150 |
| 1 to 3 months late | 1 Mar 2027 to 30 Apr 2027 | £375 |
| 3 to 6 months late | 1 May 2027 to 31 Jul 2027 | £750 |
| More than 6 months late | From 1 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 16421791
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 April 2025 (1 year ago)
- Registered office
- Eighth Floor 6 New Street Square, New Fetter Lane, London, EC4A 3AQ
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 September (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 29 April 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 London
Other active plumbing and heating companies registered in London.
- South London & Surrey Gas and Heating Ltd2023
- South London Heating Limited2007
- South Star Plumbers Limited2018
- South West 4 Property Services Ltd2021
- South West Heating & Plumbing Ltd2023
- Southeast Ecotec Services Limited2023
- Southern Gas Ltd2023
- Southern Plumbing Solutions Ltd2024
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are South Flow Plumbing & Heating Limited's accounts due?
South Flow Plumbing & Heating Limited's next accounts are due at Companies House by 31 January 2027 (in 110 days), covering the period to 30 September 2026.
When is South Flow Plumbing & Heating Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 29 April 2026, due by 29 April 2027, and one for the period to 30 September 2026, due by 30 September 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is South Flow Plumbing & Heating Limited still trading?
South Flow Plumbing & Heating 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 South Flow Plumbing & Heating Limited do?
South Flow Plumbing & Heating Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is South Flow Plumbing & Heating Limited?
South Flow Plumbing & Heating Limited was incorporated on 30 April 2025, 1 year ago.
What is the penalty if South Flow Plumbing & Heating 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 South Flow Plumbing & Heating 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.