- Companies
- Plumbers and heating engineers
- Barnet
- Koolworks Ltd
Company profile · Plumbers and heating engineers
Koolworks Ltd
Koolworks Ltd is a 4-year-old private limited company registered in Barnet, company number 13795890, one of 75 plumbing and heating companies in Barnet. 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.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Koolworks LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
Financial snapshot, 2025
From the balance sheet at 31 December 2025, as filed at Companies House. Negative net assets mean the company owed more than it owned at that date.
Koolworks Ltd over the years
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 £1,545 (-91.1%) on the year before, to -£3,241.
- Net assets rose in 0 of 3 year-on-year comparisons on record.
- Current assets of £1,777 against £5,018 owed within a year: 0.4 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | -£3,241 | £1,676 | £1,777 | £5,018 | 0 |
| 31 Dec 2024 | -£1,696 | £3,222 | £3,322 | £5,018 | 0 |
| 31 Dec 2023 | -£145 | £4,755 | £4,855 | £5,000 | 1 |
| 31 Dec 2022 | £100 | 0 |
Where Koolworks Ltd is registered
The registered office is in Barnet (EN5), in the Barnet local authority area, London. Show EN5 5BY on a map.
Other trade companies in EN5
- Paysa Gas LtdPlumbers and heating engineers
- Greatway Business LtdInstallers
- Je Mobile Tyres LtdMechanics and garages
- Barnet Air LtdPlumbers and heating engineers
- Hutch Electrical LtdElectricians
- Nexflow Mechanical LtdSpecialist contractors
- A J Plant LtdMotor traders
- Plumbing365 LtdPlumbers and heating engineers
Shared registered office
49 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Koolworks 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
- 13795890
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 December 2021 (4 years ago)
- Registered office
- 42 Lytton Road, Barnet, Hertfordshire, EN5 5BY
- Nature of business
- 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
- 13 December 2025
- Previous names
- Heat Pump Projects Limited (until 21 Sep 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 Barnet
Other active plumbing and heating companies registered in Barnet.
- L&A Plumbing and Heating Ltd2023
- Leb Gas & Plumbing Ltd2025
- LJC Plumbing Limited2025
- London Renew & Refurb Limited2018
- Mac & Weld Limited2020
- Mark Payne Plumbing & Heating Specialist Ltd2013
- MDM Heating & Plumbing Ltd2013
- Mega Plumbing and Heating Ltd2023
All plumbing and heating companies in Barnet · All trades in Barnet · Plumbers and heating engineers across the UK
Frequently asked questions
When are Koolworks Ltd's accounts due?
Koolworks 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 Koolworks 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 Koolworks Ltd still trading?
Koolworks 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 Koolworks Ltd do?
Koolworks Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Koolworks Ltd?
Koolworks Ltd was incorporated on 13 December 2021, 4 years ago.
What is the penalty if Koolworks 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 Koolworks 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.