- Companies
- Plumbers and heating engineers
- London
- Cosier Heat Ltd
Cosier Heat Ltd
- Company number
- 16314883
- Incorporated
- 13 Mar 20251 year trading
- Registered office
- Kingsbury House, 468 Church Lane, London, NW9 8UA
- Nature of business
- Plumbing, heat and air-conditioning installation
Cosier Heat Ltd is a 1-year-old private limited company registered in London, company number 16314883, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 13 December 2026, and its first CT600 is due at HMRC on 12 March 2027.
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.
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Where Cosier Heat Ltd is registered
The registered office is in London (NW9), in the Brent local authority area, London. Show NW9 8UA on a map.
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Also registered at this address
13 other companies use the same registered office as Cosier Heat Ltd.
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What happens if Cosier Heat 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 13 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 14 Dec 2026 to 13 Jan 2027 | £150 |
| 1 to 3 months late | 14 Jan 2027 to 13 Mar 2027 | £375 |
| 3 to 6 months late | 14 Mar 2027 to 13 Jun 2027 | £750 |
| More than 6 months late | From 14 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 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 | 31 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
- 16314883
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 March 2025 (1 year ago)
- Registered office
- Kingsbury House, 468 Church Lane, London, NW9 8UA
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 12 March 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 London
Other active plumbing and heating companies registered in London.
- Cosn Service Limited2025
- Cosy Flow Limited2025
- Cosy Homes Heating Ltd2024
- Cousins and Family Limited2025
- Cowan Heating and Gas Engineers Ltd2020
- Coyfield Ltd2024
- CP Gas and Heating Limited2024
- Crate Air Conditioning Limited2010
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Cosier Heat Ltd's accounts due?
Cosier Heat Ltd's next accounts are due at Companies House by 13 December 2026 (in 61 days), covering the period to 31 March 2026.
When is Cosier Heat 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 12 March 2026, due by 12 March 2027, and one for the period to 31 March 2026, due by 31 March 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Cosier Heat Ltd still trading?
Cosier Heat 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 Cosier Heat Ltd do?
Cosier Heat Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Cosier Heat Ltd?
Cosier Heat Ltd was incorporated on 13 March 2025, 1 year ago.
What is the penalty if Cosier Heat 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 Cosier Heat 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.