- Companies
- Plumbers and heating engineers
- Doncaster
- H20 Solar (Engineering) Limited
H20 Solar (Engineering) Limited
- Company number
- 06612191
- Incorporated
- 5 Jun 200818 years trading
- Registered office
- 7 Lodge Court, Hatfield, Doncaster, S. Yorks, DN7 6LQ
- Nature of business
- Plumbing, heat and air-conditioning installation
H20 Solar (Engineering) Limited is a 18-year-old private limited company registered in Doncaster, company number 06612191, one of 150 plumbing and heating companies in Doncaster. Its next accounts are due at Companies House on 26 April 2027, and the CT600 for the period to 26 July 2026 is due at HMRC on 26 July 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 £5,832 (+301.6%) on the year before, to £7,766.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £69K against £90K owed within a year: 0.8 times cover.
- 3 employees on average, down from 6 the year before.
- 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 |
|---|---|---|---|---|---|
| 26 Jul 2025 | £7,766 | £69K | £90K | 3 | |
| 30 Jul 2024 | £1,934 | £125K | £160K | 6 | |
| 30 Jul 2023 | £1,553 | £121K | £153K | 6 | |
| 30 Jul 2022 | £1,096 | £132K | £141K | 6 | |
| 30 Jul 2021 | £1,141 | £117K | £129K | 4 | |
| 30 Jul 2020 | £28K | £101K | £88K | 0 | |
| 30 Jul 2019 | £1,235 | £46K | £64K | 4 | |
| 30 Jul 2018 | £12K | £89K | £90K | ||
| 30 Jul 2017 | £4,422 | £79K | £84K | ||
| 30 Jul 2016 | £6,336 | £1,748 | £72K | £79K |
Where H20 Solar (Engineering) Limited is registered
The registered office is in Doncaster (DN7), in the Doncaster local authority area, Yorkshire and The Humber. Show DN7 6LQ on a map.
Other trade companies in DN7
- H29 Construction LtdBuilders
- South Yorkshire Material Testing LimitedSpecialist contractors
- Ckinfrastructure LtdBuilders
- Ada Installations LimitedElectricians
- JKT Commercial Services LimitedMechanics and garages
- Used Cars Club LtdMotor traders
- Elite Van Group LtdMotor traders
- BJN Mobile Mechanic LtdMechanics and garages
What happens if H20 Solar (Engineering) 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 26 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 27 Apr 2027 to 26 May 2027 | £150 |
| 1 to 3 months late | 27 May 2027 to 26 Jul 2027 | £375 |
| 3 to 6 months late | 27 Jul 2027 to 26 Oct 2027 | £750 |
| More than 6 months late | From 27 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 27 Jul 2027 | £200 |
| 3 months late | 26 Oct 2027 | another £200 |
| 6 months late | 26 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 26 Jul 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
- 06612191
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 June 2008 (18 years ago)
- Registered office
- 7 Lodge Court, Hatfield, Doncaster, S. Yorks, DN7 6LQ
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 26 July (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 26 July 2025
- Last confirmation statement
- 13 July 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 Doncaster
Other active plumbing and heating companies registered in Doncaster.
- Hayfield Heating Limited2019
- Heat Local Ltd2020
- Heat Pump Energy Ltd2020
- Heatology Renewables Ltd2026
- Hood Plumbing & Heating Services Limited2018
- Hudson’S Plumbing Solutions Limited2025
- Infusion Plumbing and Heating Ltd2018
- J Anderson Plumbing Ltd2025
All plumbing and heating companies in Doncaster · All trades in Doncaster · Plumbers and heating engineers across the UK
Frequently asked questions
When are H20 Solar (Engineering) Limited's accounts due?
H20 Solar (Engineering) Limited's next accounts are due at Companies House by 26 April 2027 (in 195 days), covering the period to 26 July 2026.
When is H20 Solar (Engineering) Limited's CT600 due?
The CT600 for the period to 26 July 2026 is due at HMRC by 26 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 27 April 2027.
Is H20 Solar (Engineering) Limited still trading?
H20 Solar (Engineering) Limited is listed as active on the Companies House register (checked 13 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 H20 Solar (Engineering) Limited do?
H20 Solar (Engineering) Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is H20 Solar (Engineering) Limited?
H20 Solar (Engineering) Limited was incorporated on 5 June 2008, 18 years ago.
What is the penalty if H20 Solar (Engineering) 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 H20 Solar (Engineering) Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.