- Companies
- Plumbers and heating engineers
- London
- Ot1 Plumbing & Heating Limited
Ot1 Plumbing & Heating Limited
- Company number
- 16698192
- Incorporated
- 5 Sep 20251 year trading
- Registered office
- 77 Avery Hill Road, London, SE9 2BJ
- Nature of business
- Plumbing, heat and air-conditioning installation
Ot1 Plumbing & Heating Limited is a 1-year-old private limited company registered in London, company number 16698192, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 5 June 2027, and its first CT600 is due at HMRC on 4 September 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 Ot1 Plumbing & Heating Limited is registered
The registered office is in London (SE9), in the Greenwich local authority area, London. Show SE9 2BJ on a map.
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Shared registered office
30 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 Ot1 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 5 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 6 Jun 2027 to 5 Jul 2027 | £150 |
| 1 to 3 months late | 6 Jul 2027 to 5 Sep 2027 | £375 |
| 3 to 6 months late | 6 Sep 2027 to 5 Dec 2027 | £750 |
| More than 6 months late | From 6 Dec 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
- 16698192
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 September 2025 (1 year ago)
- Registered office
- 77 Avery Hill Road, London, SE9 2BJ
- 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
- 4 September 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.
- Otis Flame Ltd2021
- Otoman Heating Limited2025
- Oxygen Energy Ltd2026
- Oz Mechanical Services Ltd2023
- Ozcold Limited2025
- Ozgul Pipe Fitting Services Ltd2020
- Oztim Ltd2018
- Ozyplumbingservices Limited2026
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Ot1 Plumbing & Heating Limited's accounts due?
Ot1 Plumbing & Heating Limited's next accounts are due at Companies House by 5 June 2027 (in 235 days), covering the period to 30 September 2026.
When is Ot1 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 4 September 2026, due by 4 September 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 Ot1 Plumbing & Heating Limited still trading?
Ot1 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 Ot1 Plumbing & Heating Limited do?
Ot1 Plumbing & Heating Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Ot1 Plumbing & Heating Limited?
Ot1 Plumbing & Heating Limited was incorporated on 5 September 2025, 1 year ago.
What is the penalty if Ot1 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 Ot1 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.