- Companies
- Plumbers and heating engineers
- London
- Ajax Heating Ltd
Ajax Heating Ltd
- Company number
- 17370139
- Incorporated
- 30 Jul 2026
- Registered office
- Flat 21, 3, Times Court, Guardian Avenue, London, NW9 4BG
- Nature of business
- Plumbing, heat and air-conditioning installation
Ajax Heating Ltd is a newly incorporated private limited company registered in London, company number 17370139, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 30 April 2028, and its first CT600 is due at HMRC on 29 July 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
Is this your company?
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Where Ajax Heating Ltd is registered
The registered office is in London (NW9), in the Barnet local authority area, London. Show NW9 4BG on a map.
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What happens if Ajax Heating 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
- 17370139
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 July 2026
- Registered office
- Flat 21, 3, Times Court, Guardian Avenue, London, NW9 4BG
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 July (accounting reference date)
- Accounts type
- No accounts filed yet
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.
- Ak Gas Plumbing & Heating Ltd2019
- Akdemir Limited2021
- Akers Mep Services Ltd2026
- Akgul Design Decoration & Installation Services Ltd2019
- Akhmadov Limited2012
- Akm Plumbing Ltd2022
- Akrata Plumbing Services Limited2026
- Al Zehra Building Materials (UK) Ltd2025
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Ajax Heating Ltd's accounts due?
Ajax Heating Ltd's next accounts are due at Companies House by 30 April 2028 (in 566 days), covering the period to 31 July 2027.
When is Ajax Heating Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 29 July 2027, due by 29 July 2028, and one for the period to 31 July 2027, due by 31 July 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Ajax Heating Ltd still trading?
Ajax Heating 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 Ajax Heating Ltd do?
Ajax Heating Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Ajax Heating Ltd?
Ajax Heating Ltd was incorporated on 30 July 2026, less than a year ago.
What is the penalty if Ajax Heating 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 Ajax Heating 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.