- Companies
- Plumbers and heating engineers
- Aberdeen
- Heat Tech Mechanical Limited
Heat Tech Mechanical Limited
- Company number
- SC309533
- Incorporated
- 3 Oct 200620 years trading
- Registered office
- 70A Ardarroch Road, Aberdeen, AB24 5QS
- Nature of business
- Plumbing, heat and air-conditioning installation
Heat Tech Mechanical Limited is a 20-year-old private limited company registered in Aberdeen, company number SC309533, one of 82 plumbing and heating companies in Aberdeen. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 £49K (+21.5%) on the year before, to £279K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £547K against £323K owed within a year: 1.7 times cover.
- 10 employees on average, down from 11 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 |
|---|---|---|---|---|---|
| 31 Oct 2025 | £279K | £547K | £323K | 10 | |
| 31 Oct 2024 | £229K | £413K | £219K | 11 | |
| 31 Oct 2023 | £197K | £338K | £175K | 11 | |
| 31 Oct 2022 | £197K | £343K | £185K | 11 | |
| 31 Oct 2021 | £266K | £395K | £171K | 11 | |
| 31 Oct 2020 | £281K | £480K | £234K | 11 | |
| 31 Oct 2019 | £309K | £497K | £228K | 9 | |
| 31 Oct 2018 | £370K | £474K | £138K | ||
| 31 Oct 2017 | £352K | £465K | £153K | ||
| 31 Oct 2016 | £223K | £312K | £458K | £257K |
Public contracts won
Heat Tech Mechanical Limited has one public sector contract award on record; the ones with their own published value total £500K (2024). Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Aberdeen Heat & Power Ltd | The Supply of Materials (excl HIU) and Instal of Heating & Hot Water Systems in Buildings | £500K | 27 Sep 2024 |
Where Heat Tech Mechanical Limited is registered
The registered office is in Aberdeen (AB24), in the Aberdeen City local authority area, Scotland. Show AB24 5QS on a map.
Other trade companies in AB24
- C&C Apex Renewable Heating Solutions LtdPlumbers and heating engineers
- Caledonian Renovations LtdSpecialist contractors
- MBS Painting & Decorating LtdSpecialist contractors
- TPLC Refurbs LtdProperty developers
- PDL Builds LtdInstallers
- Roof Maintenance Group LtdRoofers
- KL Heating and Plumbing LtdPlumbers and heating engineers
- PL FRC LtdBuilders
What happens if Heat Tech Mechanical 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- SC309533
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 October 2006 (20 years ago)
- Registered office
- 70A Ardarroch Road, Aberdeen, AB24 5QS
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 3 October 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 Aberdeen
Other active plumbing and heating companies registered in Aberdeen.
- Heffernan Heating & Plumbing Solutions Limited2002
- Highland Heat Harvesters Ltd2023
- Holsten Heating Ltd2025
- JST Bathrooms Limited2022
- Kelgas (UK) Limited2013
- Kelly Kooling Limited2017
- Kevin Beattie Plumbing & Heating Services Limited2001
- KL Heating and Plumbing Ltd2026
All plumbing and heating companies in Aberdeen · All trades in Aberdeen · Plumbers and heating engineers across the UK
Frequently asked questions
When are Heat Tech Mechanical Limited's accounts due?
Heat Tech Mechanical Limited's next accounts are due at Companies House by 31 July 2027 (in 292 days), covering the period to 31 October 2026.
When is Heat Tech Mechanical Limited's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is Heat Tech Mechanical Limited still trading?
Heat Tech Mechanical 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 Heat Tech Mechanical Limited do?
Heat Tech Mechanical Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Heat Tech Mechanical Limited?
Heat Tech Mechanical Limited was incorporated on 3 October 2006, 20 years ago.
Has Heat Tech Mechanical Limited won public sector contracts?
Yes. Heat Tech Mechanical Limited has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £500K), most recently from Aberdeen Heat & Power Ltd.
What is the penalty if Heat Tech Mechanical 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 Heat Tech Mechanical 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.