Warmax Ltd
- Company number
- 08405900
- Incorporated
- 18 Feb 201313 years trading
- Registered office
- 167-169 Great Portland Street 5TH Floor London, 167-169 Great Portland Street 5TH Floor, London, W1W 5PF
- Nature of business
- Plumbing, heat and air-conditioning installation; Management consultancy activities other than financial management
Warmax Ltd is a 13-year-old private limited company registered in London, company number 08405900, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 27 November 2026, and the CT600 for the period to 27 February 2026 is due at HMRC on 27 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 up £11K (+28.1%) on the year before, to -£28K.
- Net assets rose in 4 of 8 year-on-year comparisons on record.
- Current assets of £190 against £6,855 owed within a year: 0.0 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 9 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2025 | -£28K | £190 | £6,855 | 1 | |
| 28 Feb 2024 | -£39K | £129 | £8,152 | 1 | |
| 28 Feb 2023 | -£50K | £2,493 | £12K | 1 | |
| 28 Feb 2022 | £8,358 | £65K | £7,083 | 1 | |
| 28 Feb 2021 | £7 | £7 | 0 | ||
| 29 Feb 2020 | £1,954 | £1,954 | 0 | ||
| 28 Feb 2020 | £1,954 | £1,954 | £0 | 0 | |
| 28 Feb 2019 | £2,715 | £3,349 | £634 | 0 | |
| 28 Feb 2018 | £1,710 | £3,740 | £2,030 | 0 |
Where Warmax Ltd is registered
The registered office is in London (W1W), in the Westminster local authority area, London. Show W1W 5PF on a map.
Other trade companies in W1W
- Civaris LtdSpecialist contractors
- R&R Construction Group LtdBuilders
- Aurum Cooling LtdPlumbers and heating engineers
- Steam Wood Stone LtdFinishing trades
- Hau Developments LimitedProperty developers
- Group Atlas Financial 83 LtdPainters and decorators
- Energy Reward LtdMotor traders
- Holly’S Housekeeping LtdCleaning companies
Also registered at this address
11 other companies use the same registered office as Warmax Ltd.
- Awindow LtdBuilders
- Colorglo UK LimitedRepair services
- Elite Maintenance 24/7 LtdPlumbers and heating engineers
- Hayter Developments LimitedProperty developers
- Lux Edge Group LimitedSpecialist contractors
- Mdstar Services LtdSpecialist contractors
- Notebook Construction LtdCivil engineering
- Plumb-Inn Services LimitedPlumbers and heating engineers
- SG Power Distribution LtdCivil engineering
- Total Build Construction (Midlands) LimitedSpecialist contractors
- Websaway LimitedCleaning companies
What happens if Warmax 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 27 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 28 Nov 2026 to 27 Dec 2026 | £150 |
| 1 to 3 months late | 28 Dec 2026 to 27 Feb 2027 | £375 |
| 3 to 6 months late | 28 Feb 2027 to 27 May 2027 | £750 |
| More than 6 months late | From 28 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 28 Feb 2027 | £200 |
| 3 months late | 27 May 2027 | another £200 |
| 6 months late | 27 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 27 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
- 08405900
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 February 2013 (13 years ago)
- Registered office
- 167-169 Great Portland Street 5TH Floor London, 167-169 Great Portland Street 5TH Floor, London, W1W 5PF
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
Management consultancy activities other than financial management (SIC 70229) - Year end
- 27 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 18 February 2026
- Previous names
- Warmax Heating Limited (until 21 Nov 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 London
Other active plumbing and heating companies registered in London.
- Warmello Limited2025
- Warmstar Gas Ltd2015
- Warnerbros Limited2024
- Warr Mechanical Ltd2020
- Water Doctor Limited2025
- Water Freedom Limited2021
- Watercrafts Plumbing Limited2019
- Waterfall (GB) Limited2006
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Warmax Ltd's accounts due?
Warmax Ltd's next accounts are due at Companies House by 27 November 2026 (in 46 days), covering the period to 27 February 2026.
When is Warmax Ltd's CT600 due?
The CT600 for the period to 27 February 2026 is due at HMRC by 27 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 28 November 2026.
Is Warmax Ltd still trading?
Warmax 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 Warmax Ltd do?
Warmax Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220); Management consultancy activities other than financial management (SIC 70229).
How old is Warmax Ltd?
Warmax Ltd was incorporated on 18 February 2013, 13 years ago.
What is the penalty if Warmax 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 Warmax 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.