- Companies
- Civil engineering
- London
- Heatronics Limited
Heatronics Limited
- Company number
- 10714953
- Incorporated
- 7 Apr 20179 years trading
- Registered office
- Flat 5 Nayland House, Bromley Road, London, SE6 2TQ
- Nature of business
- Construction of other civil engineering projects n.e.c.
Heatronics Limited is a 9-year-old private limited company registered in London, company number 10714953, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 31 January 2027, and the CT600 for the period to 30 April 2026 is due at HMRC on 30 April 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 £1,532 (-11.3%) on the year before, to £12K.
- Net assets rose in 5 of 7 year-on-year comparisons on record.
- 1 employee on average, down from 2 the year before.
- Balance sheets on record for 8 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Apr 2025 | £12K | £1,838 | £2,772 | 1 | |
| 30 Apr 2024 | £14K | £4,396 | £4,396 | £4,155 | 2 |
| 30 Apr 2023 | £12K | £2,383 | £2,552 | £7,069 | 2 |
| 30 Apr 2022 | £19K | £6,151 | £9,911 | £8,021 | 2 |
| 30 Apr 2021 | £12K | £8,475 | £16K | £7,490 | 2 |
| 30 Apr 2020 | £365 | £9,487 | £9,487 | £9,122 | 2 |
| 30 Apr 2019 | £226 | £2,528 | £2,302 | 2 | |
| 30 Apr 2018 | £17 | £200 | £183 | 2 |
Who runs and owns Heatronics Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| P*** B*** | Director | Jan 2020 |
2 former officers
| Name | Role | Appointed | Left |
|---|---|---|---|
| J*** B*** | Director | Nov 2017 | Feb 2018 |
| S*** B*** | Director | Apr 2017 | Jan 2020 |
Person with significant control
Where Heatronics Limited is registered
The registered office is in London (SE6), in the Lewisham local authority area, London. Show SE6 2TQ on a map.
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What happens if Heatronics 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 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2027 to 28 Feb 2027 | £150 |
| 1 to 3 months late | 1 Mar 2027 to 30 Apr 2027 | £375 |
| 3 to 6 months late | 1 May 2027 to 31 Jul 2027 | £750 |
| More than 6 months late | From 1 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2027 | £200 |
| 3 months late | 30 Jul 2027 | another £200 |
| 6 months late | 30 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 10714953
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 April 2017 (9 years ago)
- Registered office
- Flat 5 Nayland House, Bromley Road, London, SE6 2TQ
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 30 April (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 20 January 2026
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in London
Other active civil engineering contractors registered in London.
- Hegarty Construction Ltd2014
- Hegarty Project Management Limited2015
- Heightlink Fall Protection Services Ltd2023
- Hejef Limited2022
- Helios Renewable Energy Solutions Limited2026
- Hello Mole Ltd2026
- Hemmanuel Ltd2025
- Henry & Son Civils Ltd2025
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are Heatronics Limited's accounts due?
Heatronics Limited's next accounts are due at Companies House by 31 January 2027 (in 111 days), covering the period to 30 April 2026.
When is Heatronics Limited's CT600 due?
The CT600 for the period to 30 April 2026 is due at HMRC by 30 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2027.
Is Heatronics Limited still trading?
Heatronics 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 Heatronics Limited do?
Heatronics Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Heatronics Limited?
Heatronics Limited was incorporated on 7 April 2017, 9 years ago.
Who runs Heatronics Limited?
Heatronics Limited has 1 active director, the longest-serving appointed in Jan 2020. Their names and service addresses are on the Companies House register.
Who owns Heatronics Limited?
One person or company has significant control of Heatronics Limited: an individual (owns 75% or more of the shares).
What is the penalty if Heatronics 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 Heatronics 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.