- Companies
- Plumbers and heating engineers
- Rotherham
- O2 Ventilation Systems Ltd
O2 Ventilation Systems Ltd
- Company number
- 11616552
- Incorporated
- 11 Oct 20188 years trading
- Registered office
- 1 Plumb Leys, Treeton, Rotherham, S60 5UH
- Nature of business
- Plumbing, heat and air-conditioning installation
O2 Ventilation Systems Ltd is a 8-year-old private limited company registered in Rotherham, company number 11616552, one of 158 plumbing and heating companies in Rotherham. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £30K (+19.5%) on the year before, to £186K.
- Net assets rose in 5 of 6 year-on-year comparisons on record.
- Current assets of £212K against £27K owed within a year: 7.9 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2025 | £186K | £189K | £212K | £27K | 1 |
| 31 Oct 2024 | £156K | £134K | £171K | £16K | 1 |
| 31 Oct 2023 | £132K | £123K | £151K | £20K | 1 |
| 31 Oct 2022 | £88K | £73K | £92K | £14K | 1 |
| 31 Oct 2021 | £105K | £92K | £126K | £22K | 1 |
| 31 Oct 2020 | £64K | £102K | £105K | £42K | 1 |
| 31 Oct 2019 | £27K | £41K | £48K | £21K |
Where O2 Ventilation Systems Ltd is registered
The registered office is in Rotherham (S60), in the Rotherham local authority area, Yorkshire and The Humber. Show S60 5UH on a map.
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What happens if O2 Ventilation Systems Ltd 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 11616552
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 October 2018 (8 years ago)
- Registered office
- 1 Plumb Leys, Treeton, Rotherham, S60 5UH
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 10 October 2025
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 Rotherham
Other active plumbing and heating companies registered in Rotherham.
- Ob Plumbing and Heating (South Yorkshire) Ltd2025
- Ollax Ltd2025
- P. C. Kelly Plumbing & Heating (Rotherham) Limited1990
- PCK Plumbing & Heating Ltd2015
- Peak Renewables Ltd2024
- Pipe DR Ltd2023
- Plumb Fusion Limited2021
- Plumbernow Ltd2023
All plumbing and heating companies in Rotherham · All trades in Rotherham · Plumbers and heating engineers across the UK
Frequently asked questions
When are O2 Ventilation Systems Ltd's accounts due?
O2 Ventilation Systems Ltd's next accounts are due at Companies House by 31 July 2027 (in 292 days), covering the period to 31 October 2026.
When is O2 Ventilation Systems Ltd's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is O2 Ventilation Systems Ltd still trading?
O2 Ventilation Systems Ltd 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 O2 Ventilation Systems Ltd do?
O2 Ventilation Systems Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is O2 Ventilation Systems Ltd?
O2 Ventilation Systems Ltd was incorporated on 11 October 2018, 8 years ago.
What is the penalty if O2 Ventilation Systems Ltd 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 O2 Ventilation Systems Ltd 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.