- Companies
- Plumbers and heating engineers
- Cardiff
- Heat Tec SW Ltd
Heat Tec SW Ltd
- Company number
- 13506785
- Incorporated
- 12 Jul 20215 years trading
- Registered office
- 249 Brynfedw, Cardiff, South Glamorgan, CF23 9PY
- Nature of business
- Plumbing, heat and air-conditioning installation
Heat Tec SW Ltd is a 5-year-old private limited company registered in Cardiff, company number 13506785, one of 170 plumbing and heating companies in Cardiff. Its next accounts are due at Companies House on 30 April 2028, and the CT600 for the period to 31 July 2027 is due at HMRC on 31 July 2028.
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 £4,635 on the year before, to £4,714.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £2,341 against £707 owed within a year: 3.3 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 5 years, 2022 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jul 2026 | £4,714 | £2,341 | £707 | 2 | |
| 31 Jul 2025 | £79 | £1,038 | £335 | 2 | |
| 31 Jul 2024 | -£860 | £572 | £572 | £1,432 | 1 |
| 31 Jul 2023 | -£1,398 | £929 | £509 | £1,907 | 1 |
| 31 Jul 2022 | £227 | £1,835 | £1,608 | 1 |
Where Heat Tec SW Ltd is registered
The registered office is in Cardiff (CF23), in the Cardiff local authority area, Wales. Show CF23 9PY on a map.
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- Lex Roofing Solutions LtdRoofers
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What happens if Heat Tec SW 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 April 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2028 to 31 May 2028 | £150 |
| 1 to 3 months late | 1 Jun 2028 to 31 Jul 2028 | £375 |
| 3 to 6 months late | 1 Aug 2028 to 31 Oct 2028 | £750 |
| More than 6 months late | From 1 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2028 | £200 |
| 3 months late | 31 Oct 2028 | another £200 |
| 6 months late | 31 Jan 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 2029 | 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
- 13506785
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 July 2021 (5 years ago)
- Registered office
- 249 Brynfedw, Cardiff, South Glamorgan, CF23 9PY
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 July 2026
- Last confirmation statement
- 11 July 2026
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 Cardiff
Other active plumbing and heating companies registered in Cardiff.
- Heatcare (Cardiff) Ltd2013
- Hewett Heating & Plumbing Ltd2012
- Hno Plumbers Ltd2018
- Hollis Plumbing and Gas Domestic Limited2021
- Hongkong Fu Dian International Group Limited2024
- Hy Plumbing &Heating Limited2026
- Ian Coughtrey & Son Heating and Plumbing Limited2021
- Iplumb Cardiff Ltd2025
All plumbing and heating companies in Cardiff · All trades in Cardiff · Plumbers and heating engineers across the UK
Frequently asked questions
When are Heat Tec SW Ltd's accounts due?
Heat Tec SW Ltd's next accounts are due at Companies House by 30 April 2028 (in 565 days), covering the period to 31 July 2027.
When is Heat Tec SW Ltd's CT600 due?
The CT600 for the period to 31 July 2027 is due at HMRC by 31 July 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2028.
Is Heat Tec SW Ltd still trading?
Heat Tec SW 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 Tec SW Ltd do?
Heat Tec SW Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Heat Tec SW Ltd?
Heat Tec SW Ltd was incorporated on 12 July 2021, 5 years ago.
What is the penalty if Heat Tec SW 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 Tec SW 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.