- Companies
- Electricians
- London
- Conwell Cooling Ltd
Conwell Cooling Ltd
- Company number
- 04904915
- Incorporated
- 19 Sep 200323 years trading
- Registered office
- 312 Bunyan Court, Barbican, London, EC2Y 8DH
- Nature of business
- Electrical installation; Plumbing, heat and air-conditioning installation
Conwell Cooling Ltd is a 23-year-old private limited company registered in London, company number 04904915, one of 3,448 electrical contractors in London. 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 down £1,017 (-5.3%) on the year before, to £18K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 | £18K | £22K | £5,748 | 0 | |
| 31 Dec 2024 | £19K | £25K | £7,268 | 0 | |
| 31 Dec 2023 | £31K | £59K | £30K | 0 | |
| 31 Dec 2022 | £22K | £50K | £30K | 0 | |
| 31 Dec 2021 | £29K | £58K | £58K | £32K | 0 |
| 31 Dec 2020 | £17K | £18K | £19K | £3,938 | 0 |
| 31 Dec 2019 | £16K | £18K | £18K | £3,472 | 0 |
| 31 Dec 2018 | £11K | £8,942 | £12K | £2,598 | 0 |
| 31 Dec 2017 | £17K | £17K | £17K | £2,314 | 0 |
| 31 Dec 2016 | £19K | £30K | £33K | £15K | 0 |
Where Conwell Cooling Ltd is registered
The registered office is in London (EC2Y), in the City of London local authority area, London. Show EC2Y 8DH on a map.
Other trade companies in EC2Y
- Eco Track & Access LtdSpecialist contractors
- NJ Groundworks & Landscaping LtdCivil engineering
- Cannon Connect LtdCivil engineering
- Landform William Road LimitedProperty developers
- Franklin Building LtdSpecialist contractors
- K Mackie Windows and Doors LtdGlaziers
- V1 Scaffolding LtdFinishing trades
- Nigel Plumb Windows LtdGlaziers
What happens if Conwell Cooling 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
- 04904915
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 September 2003 (23 years ago)
- Registered office
- 312 Bunyan Court, Barbican, London, EC2Y 8DH
- Nature of business
- Electrical installation (SIC 43210)
Plumbing, heat and air-conditioning installation (SIC 43220) - Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 19 September 2026
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 London
Other active electrical contractors registered in London.
- Cordoba Electrical Systems Ltd2026
- Core Secur Ltd2025
- Corecroft Limited2001
- Coring & Grant Electrical Projects Ltd2021
- Correct Electrical Ltd2019
- Corrigan's (Electrical) Ltd2026
- Corva Ltd2025
- Cosmar Electrical Contractors Limited2003
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are Conwell Cooling Ltd's accounts due?
Conwell Cooling 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 Conwell Cooling 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 Conwell Cooling Ltd still trading?
Conwell Cooling 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 Conwell Cooling Ltd do?
Conwell Cooling Ltd is registered under Electrical installation (SIC 43210); Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Conwell Cooling Ltd?
Conwell Cooling Ltd was incorporated on 19 September 2003, 23 years ago.
What is the penalty if Conwell Cooling 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 Conwell Cooling 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.