- Companies
- Plumbers and heating engineers
- Welwyn
- C A Warner Ltd
C A Warner Ltd
- Company number
- 09931611
- Incorporated
- 29 Dec 201510 years trading
- Registered office
- 8 Hammond Close, Welwyn, Hertfordshire, AL6 9FH
- Nature of business
- Plumbing, heat and air-conditioning installation
C A Warner Ltd is a 10-year-old private limited company registered in Welwyn, company number 09931611, one of 11 plumbing and heating companies in Welwyn. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 unchanged on the year before, at £100.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £43K against £49K owed within a year: 0.9 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £100 | £43K | £49K | 1 | |
| 31 Dec 2024 | £100 | £22K | £26K | 1 | |
| 31 Dec 2023 | £8,602 | £25K | £17K | 1 | |
| 31 Dec 2022 | £28K | £66K | £25K | 1 | |
| 31 Dec 2021 | £2,964 | £40K | £14K | 1 | |
| 31 Dec 2020 | £100 | £61K | £11K | 1 | |
| 31 Dec 2019 | -£6,995 | -£10K | £3,111 | 1 | |
| 31 Dec 2018 | -£6,835 | -£12K | £5,122 | ||
| 31 Dec 2017 | £162 | £36K | £8,401 | ||
| 31 Dec 2016 | £109 | £9,242 | £5,019 |
Where C A Warner Ltd is registered
The registered office is in Welwyn (AL6), in the Welwyn Hatfield local authority area, East of England. Show AL6 9FH on a map.
Other trade companies in AL6
- Herts Climate Solutions LtdPlumbers and heating engineers
- Cosmorepairs LtdRepair services
- Little Enterprise Group LtdProperty developers
- Sehiti Plumbing and Heating LtdPlumbers and heating engineers
- LMC Highway Design LtdCivil engineering
- Fox Huhu Trading LimitedBuilders
- Enclosure Zoolutions LtdProperty developers
- G.I. Installation Services LimitedBuilders
What happens if C A Warner 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 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 09931611
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 December 2015 (10 years ago)
- Registered office
- 8 Hammond Close, Welwyn, Hertfordshire, AL6 9FH
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 20 May 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 Welwyn
Other active plumbing and heating companies registered in Welwyn.
- G & A Plumbing and Heating Engineers Limited2000
- Hertfordshire Premier Plumbing and Heating Ltd2018
- Herts Climate Solutions Ltd2026
- Oaklands Plumbing Company Ltd2026
- Sehiti Plumbing and Heating Ltd2026
- Space Heating Limited2007
- Target Drainage & Plumbing Ltd2022
- Warner Bros Plumbing and Heating Ltd2015
All plumbing and heating companies in Welwyn · All trades in Welwyn · Plumbers and heating engineers across the UK
Frequently asked questions
When are C A Warner Ltd's accounts due?
C A Warner Ltd's next accounts are due at Companies House by 30 September 2027 (in 353 days), covering the period to 31 December 2026.
When is C A Warner Ltd's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is C A Warner Ltd still trading?
C A Warner 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 C A Warner Ltd do?
C A Warner Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is C A Warner Ltd?
C A Warner Ltd was incorporated on 29 December 2015, 10 years ago.
What is the penalty if C A Warner 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 C A Warner 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.