- Companies
- Plumbers and heating engineers
- Argonaut Heating Limited
Argonaut Heating Limited
- Company number
- 01046498
- Incorporated
- 17 Mar 197254 years trading
- Registered office
- 6 Portland Business Centre, Manor House Lane, Datchet, SL3 9EG
- Nature of business
- Plumbing, heat and air-conditioning installation
Argonaut Heating Limited is a 54-year-old private limited company registered in Datchet, company number 01046498, one of the UK's plumbing and heating companies. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
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 down £20K (-46.7%) on the year before, to £23K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £114K against £111K owed within a year: 1.0 times cover.
- 4 employees on average during the year.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £23K | £114K | £111K | 4 | |
| 31 Mar 2025 | £42K | £159K | £119K | 4 | |
| 31 Mar 2024 | £86K | £206K | £123K | 5 | |
| 31 Mar 2023 | £137K | £265K | £133K | 5 | |
| 31 Mar 2022 | £141K | £288K | £152K | 5 | |
| 31 Mar 2021 | £122K | £306K | £189K | 5 | |
| 31 Mar 2020 | £95K | £247K | £159K | 5 | |
| 31 Mar 2019 | £143K | £288K | £151K | ||
| 31 Mar 2018 | £118K | £288K | £178K | ||
| 31 Mar 2017 | £104K | £290K | £190K |
Where Argonaut Heating Limited is registered
The registered office is in Datchet (SL3), in the Windsor and Maidenhead local authority area, South East. Show SL3 9EG on a map.
Other trade companies in SL3
- Tac Design & Build LtdFinishing trades
- G&S Formwork LtdBuilders
- Klenzo LtdCleaning companies
- West London Crown Construction LtdBuilders
- Dahlia Investment Group LimitedProperty developers
- Ekon Electrics LtdElectricians
- R&G Maintenance LtdCleaning companies
- Cornerstone Homes & Estates LtdProperty developers
Also registered at this address
11 other companies use the same registered office as Argonaut Heating Limited.
- Agis Maintenance LtdElectricians
- Blue Heaven Group LimitedInstallers
- Cozy Home Improvements LtdBuilders
- Dahlia Investment Group LimitedProperty developers
- Greenwinter LtdPlumbers and heating engineers
- Hampton Hill Flooring LtdFloor and wall tilers
- Kelly Tekk Lifting Consultancy LtdSpecialist contractors
- Lightwood Property Maintenance LtdPlumbers and heating engineers
- Pioneer Prestige Automotive Collectibles LtdMotor traders
- Top Motor Group LtdMotor traders
- Yahya Cars Pty LtdMotor traders
What happens if Argonaut 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 31 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 01046498
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 March 1972 (54 years ago)
- Registered office
- 6 Portland Business Centre, Manor House Lane, Datchet, SL3 9EG
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 21 July 2026
- Charges (mortgages)
- 0 outstanding of 2 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.
Frequently asked questions
When are Argonaut Heating Limited's accounts due?
Argonaut Heating Limited's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is Argonaut Heating Limited's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Argonaut Heating Limited still trading?
Argonaut 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 Argonaut Heating Limited do?
Argonaut Heating Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Argonaut Heating Limited?
Argonaut Heating Limited was incorporated on 17 March 1972, 54 years ago.
What is the penalty if Argonaut 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 Argonaut 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.