- Companies
- Plumbers and heating engineers
- Kelvinair Limited
Kelvinair Limited
- Company number
- 04325210
- Incorporated
- 20 Nov 200124 years trading
- Registered office
- Unit 1, Sovereign Business Park, Butterley Street Leeds, West Yorkshire, LS10 1AW
- Nature of business
- Plumbing, heat and air-conditioning installation
Kelvinair Limited is a 24-year-old private limited company registered in Butterley Street Leeds, company number 04325210, one of the UK's plumbing and heating companies. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 £14K (+157%) on the year before, to £23K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £831K against £373K owed within a year: 2.2 times cover.
- 15 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £23K | £162K | £831K | £373K | 15 |
| 31 Dec 2024 | £9,074 | £693 | £998K | £425K | 15 |
| 31 Dec 2023 | -£79K | £201K | £1.7M | £1.2M | 16 |
| 31 Dec 2022 | -£271K | £0 | £1.5M | £1.5M | 15 |
| 31 Dec 2021 | -£308K | £60K | £1.4M | £1.4M | 16 |
| 31 Dec 2020 | -£667K | £0 | £867K | £1.3M | 20 |
| 30 Jun 2019 | £31K | £12K | £1.8M | £1.6M | 22 |
| 30 Jun 2018 | £139K | £62K | £1.5M | £1.4M | 20 |
| 30 Jun 2017 | £169K | £339K | £1.6M | £1.4M | 20 |
| 30 Jun 2016 | £138K | £154K | £993K | £912K |
Where Kelvinair Limited is registered
The registered office is in Butterley Street Leeds (LS10), in the Leeds local authority area, Yorkshire and The Humber. Show LS10 1AW on a map.
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- Nem Build LtdInstallers
- Goodshaw Motors LtdMotor traders
- JW & Son Roofing LtdRoofers
- Doors by Design (Leeds) LtdJoiners and carpenters
- Prime Build & Trade LtdPainters and decorators
- Aehale Electrical LimitedElectricians
What happens if Kelvinair 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 04325210
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 November 2001 (24 years ago)
- Registered office
- Unit 1, Sovereign Business Park, Butterley Street Leeds, West Yorkshire, LS10 1AW
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 16 November 2025
- Charges (mortgages)
- 1 outstanding of 1 registered
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
Other active plumbing and heating companies.
- Res Pipework Installations Limited2001
- Colin Thom Plumbing & Heating Limited2001
- Allied Building Services UK Limited2001
- Alastair Bramwell Plumbing & Heating Limited2001
- Martin Melville Plumbing & Heating Limited2001
- Shelan Communications Limited2001
- G W Plumer & Sons Limited2001
- P.M. Mechanical Limited2001
Frequently asked questions
When are Kelvinair Limited's accounts due?
Kelvinair Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Kelvinair Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Kelvinair Limited still trading?
Kelvinair 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 Kelvinair Limited do?
Kelvinair Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Kelvinair Limited?
Kelvinair Limited was incorporated on 20 November 2001, 24 years ago.
What is the penalty if Kelvinair 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 Kelvinair 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.