- Companies
- Plumbers and heating engineers
- Liverpool
- Conox Mechanical Services Limited
Conox Mechanical Services Limited
- Company number
- 06685004
- Incorporated
- 1 Sep 200818 years trading
- Registered office
- Suite 6A, 10 Duke Street, Liverpool, L1 5AS
- Nature of business
- Plumbing, heat and air-conditioning installation
Conox Mechanical Services Limited is a 18-year-old private limited company registered in Liverpool, company number 06685004, one of 377 plumbing and heating companies in Liverpool. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 up £37K (+9.6%) on the year before, to £427K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £854K against £471K owed within a year: 1.8 times cover.
- 4 employees on average, down from 5 the year before.
- 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 Mar 2025 | £427K | £11K | £854K | £471K | 4 |
| 31 Mar 2024 | £390K | £18K | £639K | £302K | 5 |
| 31 Mar 2023 | £380K | £32K | £587K | £263K | 5 |
| 31 Mar 2022 | £340K | £561K | £242K | 4 | |
| 31 Mar 2021 | £358K | £2,717 | £583K | £247K | 12 |
| 31 Mar 2020 | £373K | £121K | £532K | £188K | 12 |
| 31 Mar 2019 | £250K | £151K | £412K | £186K | |
| 31 Mar 2018 | £90K | £67K | £155K | £81K | 7 |
| 31 Mar 2017 | £2,625 | £38K | £78K | £89K | 8 |
| 31 Mar 2016 | £12K | £13K | £105K | £93K |
Where Conox Mechanical Services Limited is registered
The registered office is in Liverpool (L1), in the Liverpool local authority area, North West. Show L1 5AS on a map.
Other trade companies in L1
- Osy Brothers LimitedRepair services
- Karle Construction LimitedProperty developers
- McOre Electrical LtdRepair services
- Aintrees Facilities LtdElectricians
- Emoto Repairs LtdMechanics and garages
- Jas Lifting LimitedSpecialist contractors
- Smarter Future Homes LimitedFinishing trades
- Digi Care & Repair LimitedRepair services
Shared registered office
66 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 Conox Mechanical Services Limited 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 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
- 06685004
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 September 2008 (18 years ago)
- Registered office
- Suite 6A, 10 Duke Street, Liverpool, L1 5AS
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 29 September 2025
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 Liverpool
Other active plumbing and heating companies registered in Liverpool.
- Content Renewables Limited2021
- Contrast Climate NW Ltd2026
- Core Mechanical & Maintenance Services Limited2023
- Cosmic Cooling Ltd2026
- Crescent Plumbing & Heating Ltd2022
- Crosby Heating & Gas Ltd2010
- Crosby Maintenance Ltd2026
- Cyprian Construction Limited2025
All plumbing and heating companies in Liverpool · All trades in Liverpool · Plumbers and heating engineers across the UK
Frequently asked questions
When are Conox Mechanical Services Limited's accounts due?
Conox Mechanical Services Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Conox Mechanical Services Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Conox Mechanical Services Limited still trading?
Conox Mechanical Services Limited 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 Conox Mechanical Services Limited do?
Conox Mechanical Services Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Conox Mechanical Services Limited?
Conox Mechanical Services Limited was incorporated on 1 September 2008, 18 years ago.
What is the penalty if Conox Mechanical Services Limited 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 Conox Mechanical Services Limited 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.