- Companies
- Plumbers and heating engineers
- Dunstable
- Heat Cool Tech Ltd
Heat Cool Tech Ltd
- Company number
- 12446516
- Incorporated
- 6 Feb 20206 years trading
- Registered office
- 73 Houghton Road, Dunstable, LU5 5AB
- Nature of business
- Plumbing, heat and air-conditioning installation
Heat Cool Tech Ltd is a 6-year-old private limited company registered in Dunstable, company number 12446516, one of 77 plumbing and heating companies in Dunstable. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 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 down £3,272 (-85.9%) on the year before, to £535.
- Net assets rose in 2 of 4 year-on-year comparisons on record.
- Current assets of £1,668 against £189 owed within a year: 8.8 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2025 | £535 | £1,668 | £189 | 1 | |
| 29 Feb 2024 | £3,807 | £325 | £4,132 | 1 | |
| 28 Feb 2023 | £3,271 | £4,520 | £7,791 | 1 | |
| 28 Feb 2022 | £356 | £502 | £858 | 1 | |
| 28 Feb 2021 | £1,316 | £2,269 | £3,585 | 1 |
Where Heat Cool Tech Ltd is registered
The registered office is in Dunstable (LU5), in the Central Bedfordshire local authority area, East of England. Show LU5 5AB on a map.
Other trade companies in LU5
- Holz Stehlen Interiors LtdJoiners and carpenters
- Group V Motors LimitedMotor traders
- Marsiv LtdBuilders
- FB Engineering Solutions LtdSpecialist contractors
- Valmir Plastering LtdPlasterers
- Jeeva Engineering LtdCivil engineering
- Shinning Stars Cleaning LtdCleaning companies
- Coc Floring LtdBuilders
What happens if Heat Cool Tech 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 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 12446516
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 February 2020 (6 years ago)
- Registered office
- 73 Houghton Road, Dunstable, LU5 5AB
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 29 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 5 February 2026
- Previous names
- Diamond Team Ltd (until 17 Mar 2024)
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 Dunstable
Other active plumbing and heating companies registered in Dunstable.
- Highfield Heating and Gas Ltd2022
- Impulse Heating Limited2010
- Innov8 Bathrooms and Heating Ltd2019
- J.Z Plumbing & Heating Services Ltd2026
- K & J Plumbing Limited2005
- K.M Carpentry & Joinery Limited2006
- Kemwest Limited2010
- KJD Plumbing & Heating Ltd2022
All plumbing and heating companies in Dunstable · All trades in Dunstable · Plumbers and heating engineers across the UK
Frequently asked questions
When are Heat Cool Tech Ltd's accounts due?
Heat Cool Tech Ltd's next accounts are due at Companies House by 30 November 2026 (in 48 days), covering the period to 28 February 2026.
When is Heat Cool Tech Ltd's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is Heat Cool Tech Ltd still trading?
Heat Cool Tech 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 Heat Cool Tech Ltd do?
Heat Cool Tech Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Heat Cool Tech Ltd?
Heat Cool Tech Ltd was incorporated on 6 February 2020, 6 years ago.
What is the penalty if Heat Cool Tech 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 Heat Cool Tech 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.