- Companies
- Plumbers and heating engineers
- Borehamwood
- Thermapro Ltd
Thermapro Ltd
- Company number
- 15358240
- Incorporated
- 18 Dec 20232 years trading
- Registered office
- Devonshire House, Manor Way, Borehamwood, WD6 1QQ
- Nature of business
- Plumbing, heat and air-conditioning installation
Thermapro Ltd is a 2-year-old private limited company registered in Borehamwood, company number 15358240, one of 33 plumbing and heating companies in Borehamwood. 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 £36K (+41.6%) on the year before, to £123K.
- Current assets of £126K against £7,348 owed within a year: more than 10 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £123K | £53K | £126K | £7,348 | 1 |
| 31 Dec 2024 | £87K | £50K | £151K | £70K | 1 |
Where Thermapro Ltd is registered
The registered office is in Borehamwood (WD6), in the Hertsmere local authority area, East of England. Show WD6 1QQ on a map.
Other trade companies in WD6
- Blackstone Builders LtdBuilders
- Clements Hall (Contracts) LtdFloor and wall tilers
- P & P Roofing & Guttering LimitedProperty developers
- Stern Landscaping LtdLandscapers and gardeners
- Complete Paint & Decor LtdPainters and decorators
- 1ST Response Plumbing and Heating LimitedPlumbers and heating engineers
- Ideal Casa Construction LtdInstallers
- Gallop Construction LimitedBuilders
Shared registered office
37 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 Thermapro 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 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
- 15358240
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 December 2023 (2 years ago)
- Registered office
- Devonshire House, Manor Way, Borehamwood, WD6 1QQ
- 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
- 17 December 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 Borehamwood
Other active plumbing and heating companies registered in Borehamwood.
- Ultimate Plumbing Limited2021
- 1ST Response Plumbing and Heating Limited2026
- Abelflow Ltd2024
- Ask the Plumber London Limited2015
- Assured Heating Essex Limited2013
- Atmosfair Ltd.2020
- Blue Water Renewables Ltd2022
- Blue Water Systems Limited2012
All plumbing and heating companies in Borehamwood · All trades in Borehamwood · Plumbers and heating engineers across the UK
Frequently asked questions
When are Thermapro Ltd's accounts due?
Thermapro Ltd's next accounts are due at Companies House by 30 September 2027 (in 353 days), covering the period to 31 December 2026.
When is Thermapro Ltd'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 Thermapro Ltd still trading?
Thermapro 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 Thermapro Ltd do?
Thermapro Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Thermapro Ltd?
Thermapro Ltd was incorporated on 18 December 2023, 2 years ago.
What is the penalty if Thermapro 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 Thermapro 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.