- Companies
- Plumbers and heating engineers
- London
- Oncall Plumbing Limited
Oncall Plumbing Limited
- Company number
- 17182498
- Incorporated
- 27 Apr 2026
- Registered office
- 167-169 Great Portland Street, 5TH Floor, London, W1W 5PF
- Nature of business
- Plumbing, heat and air-conditioning installation
Oncall Plumbing Limited is a newly incorporated private limited company registered in London, company number 17182498, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 27 January 2028, and its first CT600 is due at HMRC on 26 April 2028.
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 Oncall Plumbing Limited is registered
The registered office is in London (W1W), in the Westminster local authority area, London. Show W1W 5PF on a map.
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- Holly’S Housekeeping LtdCleaning companies
Shared registered office
1,494 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Oncall 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 27 January 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 28 Jan 2028 to 27 Feb 2028 | £150 |
| 1 to 3 months late | 28 Feb 2028 to 27 Apr 2028 | £375 |
| 3 to 6 months late | 28 Apr 2028 to 27 Jul 2028 | £750 |
| More than 6 months late | From 28 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2028 | £200 |
| 3 months late | 30 Jul 2028 | another £200 |
| 6 months late | 30 Oct 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 2029 | 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
- 17182498
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 27 April 2026
- Registered office
- 167-169 Great Portland Street, 5TH Floor, London, W1W 5PF
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 April (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.
- One Call HVAC Ltd2025
- One Protect Ltd2020
- Onflow Plumbing & Heating Ltd2020
- Ong Plumbing Limited2026
- Onise Plumbing Limited2025
- Onsite Contractors & Plumbing Ltd2015
- Onus Plumbing & Heating Limited2024
- Onyx Electrical & Plumbing Ltd2026
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Oncall Plumbing Limited's accounts due?
Oncall Plumbing Limited's next accounts are due at Companies House by 27 January 2028 (in 471 days), covering the period to 30 April 2027.
When is Oncall 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 26 April 2027, due by 26 April 2028, and one for the period to 30 April 2027, due by 30 April 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Oncall Plumbing Limited still trading?
Oncall 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 Oncall Plumbing Limited do?
Oncall Plumbing Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Oncall Plumbing Limited?
Oncall Plumbing Limited was incorporated on 27 April 2026, less than a year ago.
What is the penalty if Oncall 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 Oncall 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.