- Companies
- Plumbers and heating engineers
- London
- Portman Plumbing Limited
Portman Plumbing Limited
- Company number
- 16827223
- Incorporated
- 3 Nov 2025
- Registered office
- Office 10, 121 Gloucester Place, London, W1U 6JY
- Nature of business
- Plumbing, heat and air-conditioning installation
Portman Plumbing Limited is a newly incorporated private limited company registered in London, company number 16827223, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 3 August 2027, and its first CT600 is due at HMRC on 2 November 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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Who runs and owns Portman Plumbing Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| L*** C*** | Director | Nov 2025 |
Person with significant control
Where Portman Plumbing Limited is registered
The registered office is in London (W1U), in the Westminster local authority area, London. Show W1U 6JY on a map.
Other trade companies in W1U
- Gpewi Docks LimitedProperty developers
- 113 Noel Road LimitedProperty developers
- Valtaro Property Services LtdFinishing trades
- Hunton House Development LimitedProperty developers
- MW Developments No1 LimitedProperty developers
- Central Property Maintenance and Management Services LtdBuilders
- Welbeck Developments LimitedBuilders
- Eco Construction Group LtdProperty developers
Also registered at this address
5 other companies use the same registered office as Portman Plumbing Limited.
- Portman Electrical LimitedElectricians
- Portman Heating LimitedPlumbers and heating engineers
- Portman Property Services LimitedPlumbers and heating engineers
- Portman Renewables LimitedElectricians
- Portman Roofing LimitedRoofers
What happens if Portman Plumbing 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 3 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 4 Aug 2027 to 3 Sep 2027 | £150 |
| 1 to 3 months late | 4 Sep 2027 to 3 Nov 2027 | £375 |
| 3 to 6 months late | 4 Nov 2027 to 3 Feb 2028 | £750 |
| More than 6 months late | From 4 Feb 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
- 16827223
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 November 2025
- Registered office
- Office 10, 121 Gloucester Place, London, W1U 6JY
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 November (accounting reference date)
- Accounts type
- No accounts filed yet
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.
- Portman Property Services Limited2024
- Portrait Plumbing & Heating Ltd2022
- Poseidon Plumbing and Heating Ltd2017
- Powerflow Gas & Heating Ltd2022
- Powerflush Limited2005
- Powertech Energy Solutions Ltd.2023
- PPG Construction Ltd2026
- Precision Climate Solutions Limited2024
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Portman Plumbing Limited's accounts due?
Portman Plumbing Limited's next accounts are due at Companies House by 3 August 2027 (in 294 days), covering the period to 30 November 2026.
When is Portman Plumbing 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 2 November 2026, due by 2 November 2027, and one for the period to 30 November 2026, due by 30 November 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Portman Plumbing Limited still trading?
Portman Plumbing 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 Portman Plumbing Limited do?
Portman Plumbing Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Portman Plumbing Limited?
Portman Plumbing Limited was incorporated on 3 November 2025, less than a year ago.
Who runs Portman Plumbing Limited?
Portman Plumbing Limited has 1 active director, the longest-serving appointed in Nov 2025. Their names and service addresses are on the Companies House register.
Who owns Portman Plumbing Limited?
One person or company has significant control of Portman Plumbing Limited: an individual (owns 75% or more of the shares).
What is the penalty if Portman Plumbing 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 Portman Plumbing 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.