- Companies
- Electricians
- Cardiff
- Warmzilla Limited
Warmzilla Limited
- Company number
- 09301554
- Incorporated
- 7 Nov 201411 years trading
- Registered office
- Capital Tower Business Centre, 3RD Floor Capital Tower, Cardiff, CF10 3AG
- Nature of business
- Electrical installation; Plumbing, heat and air-conditioning installation; Retail sale via mail order houses or via Internet
Warmzilla Limited is a 11-year-old private limited company registered in Cardiff, company number 09301554, one of 223 electrical contractors in Cardiff. Its next accounts are due at Companies House on 30 December 2026, and the CT600 for the period to 30 March 2026 is due at HMRC on 30 March 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 £1,486 (-0.6%) on the year before, to £265K.
- Net assets rose in 3 of 8 year-on-year comparisons on record.
- 11 employees on average, up from 10 the year before.
- Balance sheets on record for 9 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £265K | £667K | 11 | ||
| 31 Mar 2024 | £266K | £735K | £193K | 10 | |
| 31 Mar 2023 | £268K | £126K | £1.1M | £851K | 9 |
| 31 Mar 2022 | £274K | £402K | £993K | £715K | 9 |
| 31 Mar 2021 | £157K | £632K | £844K | £656K | 6 |
| 30 Nov 2019 | £12K | £37K | £24K | ||
| 30 Nov 2018 | -£701 | £701 | |||
| 30 Nov 2017 | -£701 | £701 | |||
| 30 Nov 2016 | -£701 | £436 | £1,137 |
Where Warmzilla Limited is registered
The registered office is in Cardiff (CF10), in the Cardiff local authority area, Wales. Show CF10 3AG on a map.
Other trade companies in CF10
- Hudcon LtdBuilders
- Skyline Pitched and Flat Roofing LtdRoofers
- Eclipse Construction Group LtdPlasterers
- DWR Plumbing LtdPlumbers and heating engineers
- CF Glazing LtdGlaziers
- Regency Construction Group LtdProperty developers
- Qproperty Solutions LimitedFinishing trades
- Express Vehicle Services (Cardiff) LimitedMechanics and garages
What happens if Warmzilla 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 30 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 31 Dec 2026 to 30 Jan 2027 | £150 |
| 1 to 3 months late | 31 Jan 2027 to 30 Mar 2027 | £375 |
| 3 to 6 months late | 31 Mar 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 31 Mar 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Mar 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
- 09301554
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 November 2014 (11 years ago)
- Registered office
- Capital Tower Business Centre, 3RD Floor Capital Tower, Cardiff, CF10 3AG
- Nature of business
- Electrical installation (SIC 43210)
Plumbing, heat and air-conditioning installation (SIC 43220)
Retail sale via mail order houses or via Internet (SIC 47910) - Year end
- 30 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 25 August 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
- Previous names
- Heatsource Wales Total Care Ltd (until 10 Mar 2018)
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Cardiff
Other active electrical contractors registered in Cardiff.
- ZM Electrician Ltd2024
- 12 Electrical & Emergency Electrician Ltd2025
- 24/7 Plumbing Heating Electrical Limited2017
- A Connors Electrical Ltd2022
- A Grubb Electrical Ltd2014
- A J Crews & Co Limited1974
- A.R.B. Electrical Ltd1996
- Advanced Electrical & Fire Ltd2024
All electrical contractors in Cardiff · All trades in Cardiff · Electricians across the UK
Frequently asked questions
When are Warmzilla Limited's accounts due?
Warmzilla Limited's next accounts are due at Companies House by 30 December 2026 (in 79 days), covering the period to 30 March 2026.
When is Warmzilla Limited's CT600 due?
The CT600 for the period to 30 March 2026 is due at HMRC by 30 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 31 December 2026.
Is Warmzilla Limited still trading?
Warmzilla 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 Warmzilla Limited do?
Warmzilla Limited is registered under Electrical installation (SIC 43210); Plumbing, heat and air-conditioning installation (SIC 43220); Retail sale via mail order houses or via Internet (SIC 47910).
How old is Warmzilla Limited?
Warmzilla Limited was incorporated on 7 November 2014, 11 years ago.
What is the penalty if Warmzilla 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 Warmzilla 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.