- Companies
- Electricians
- London
- Portman Renewables Limited
Portman Renewables Limited
- Company number
- 16830119
- Incorporated
- 4 Nov 2025
- Registered office
- Office 10, 121 Gloucester Place, London, W1U 6JY
- Nature of business
- Electrical installation; Plumbing, heat and air-conditioning installation
Portman Renewables Limited is a newly incorporated private limited company registered in London, company number 16830119, one of 3,448 electrical contractors in London. Its next accounts are due at Companies House on 4 August 2027, and its first CT600 is due at HMRC on 3 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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Where Portman Renewables Limited is registered
The registered office is in London (W1U), in the Westminster local authority area, London. Show W1U 6JY on a map.
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Also registered at this address
5 other companies use the same registered office as Portman Renewables Limited.
- Portman Electrical LimitedElectricians
- Portman Heating LimitedPlumbers and heating engineers
- Portman Plumbing LimitedPlumbers and heating engineers
- Portman Property Services LimitedPlumbers and heating engineers
- Portman Roofing LimitedRoofers
What happens if Portman Renewables 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 4 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 5 Aug 2027 to 4 Sep 2027 | £150 |
| 1 to 3 months late | 5 Sep 2027 to 4 Nov 2027 | £375 |
| 3 to 6 months late | 5 Nov 2027 to 4 Feb 2028 | £750 |
| More than 6 months late | From 5 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
- 16830119
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 November 2025
- Registered office
- Office 10, 121 Gloucester Place, London, W1U 6JY
- Nature of business
- Electrical installation (SIC 43210)
Plumbing, heat and air-conditioning installation (SIC 43220) - Year end
- 30 November (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in London
Other active electrical contractors registered in London.
- Portobello Electrical Ltd2025
- Potestas Services Limited2017
- Power & Pipes Ltd2022
- Power Connexions Limited2011
- Power Delivery Co Ltd2025
- Power Electrical Services LDN Limited2022
- Power Energy Net Ltd2017
- Power Factor Electrical Ltd2026
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are Portman Renewables Limited's accounts due?
Portman Renewables Limited's next accounts are due at Companies House by 4 August 2027 (in 295 days), covering the period to 30 November 2026.
When is Portman Renewables 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 3 November 2026, due by 3 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 Renewables Limited still trading?
Portman Renewables 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 Renewables Limited do?
Portman Renewables Limited is registered under Electrical installation (SIC 43210); Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Portman Renewables Limited?
Portman Renewables Limited was incorporated on 4 November 2025, less than a year ago.
What is the penalty if Portman Renewables 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 Renewables 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.