- Companies
- Plumbers and heating engineers
- Consett
- Zenith Mechanical Services Limited
Zenith Mechanical Services Limited
- Company number
- 10923602
- Incorporated
- 18 Aug 20179 years trading
- Registered office
- Office 89, Derwentside Business Centre, Consett, Co Durham, DH8 6BN
- Nature of business
- Plumbing, heat and air-conditioning installation
Zenith Mechanical Services Limited is a 9-year-old private limited company registered in Consett, company number 10923602, one of 28 plumbing and heating companies in Consett. 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 up £14K (+4.8%) on the year before, to £315K.
- Net assets rose in 6 of 7 year-on-year comparisons on record.
- Current assets of £1.7M against £1.4M owed within a year: 1.2 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 8 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £315K | £162K | £1.7M | £1.4M | 0 |
| 31 Dec 2024 | £300K | £442K | £1.6M | £1.3M | 0 |
| 31 Dec 2023 | £309K | £254K | £1.1M | £833K | 17 |
| 31 Dec 2022 | £231K | £204K | £778K | £534K | 17 |
| 31 Dec 2021 | £195K | £112K | £558K | £341K | 16 |
| 31 Dec 2020 | £86K | £26K | £234K | £112K | 10 |
| 31 Aug 2019 | £30K | £59K | £33K | ||
| 31 Aug 2018 | £147 | £29K | £32K |
Who runs and owns Zenith Mechanical Services Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (3)
| Name | Role | Appointed |
|---|---|---|
| J*** H*** | Director | Aug 2017 |
| D*** H*** | Director | Aug 2017 |
| J*** H*** | Secretary | Aug 2017 |
People with significant control (2)
Public contracts won
Zenith Mechanical Services Limited has 20 public sector contract awards on record; the ones with their own published value total £26M, from 2019 to 2026. Source: Contracts Finder and Find a Tender award notices. For 8 of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. 16 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Prosper10 awards
- Durham Aged Mineworkers Homes Association (DAMHA)4 awards
- Karbon Homes2 awards
- Northumbrian Water Limited1 award
- North Star Housing Group1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Northumbrian Water Limited | FA08-24 - Domestic Heating & Electrical Compliance | Ceiling, not shown | 6 Aug 2026 |
| North Star Housing Group | Servicing and Repair of Commercial Gas Heating Equipment | 20 May 2026 | |
| Newcastle City Council | Plumbing / Heating Support | Ceiling, not shown | 26 Mar 2026 |
| Prosper | DAMHA - Gas Boiler Programme & Servicing | £2.6M | 19 Mar 2026 |
| Prosper | DAMHA - Gas Boiler Programme & Servicing | £1.3M | 19 Mar 2026 |
| Prosper | North Star - WHF Wave 3 Works | £1.6M | 28 Jan 2026 |
| Prosper | Tyne Housing - WHF Wave 3 Works | £255K | 20 Jan 2026 |
| Prosper | Livin - WHF Wave 3 Works | £635K | 5 Jan 2026 |
| Prosper | *Decarbonisation & Investment Works Framework [DN762948] | Ceiling, not shown | 20 Jun 2025 |
| Prosper | Investment Works Framework | Ceiling, not shown | 29 Apr 2025 |
Showing the 10 most recent of 20.
Where Zenith Mechanical Services Limited is registered
The registered office is in Consett (DH8), in the County Durham local authority area, North East. Show DH8 6BN on a map.
Other trade companies in DH8
- Tyneside Truck Services LtdMechanics and garages
- Machine Service Solutions LtdMachinery repair and installation
- Ag Motors Ne LimitedMotor traders
- SWS Scaffolding Ne LimitedScaffolders
- GH Management and Operator Services North East LtdSpecialist contractors
- Avana Property Solutions LimitedProperty developers
- Promptech Mechanical LtdBuilders
- Kee Home Solutions LtdJoiners and carpenters
What happens if Zenith 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 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
- 10923602
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 August 2017 (9 years ago)
- Registered office
- Office 89, Derwentside Business Centre, Consett, Co Durham, DH8 6BN
- 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
- 8 October 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 Consett
Other active plumbing and heating companies registered in Consett.
- A1 Ventilation Services Limited2017
- Aca Gas, Heating and Plumbing Ltd2021
- Compass Ne Limited2019
- Consett Gas Stoves & Bathrooms Limited2017
- DC Installations (Ne) Limited2018
- Derwentside Gas Limited2007
- Efficient Heating Solutions North East Limited2022
- GMD Plumbing & Heating Specialists Ltd2025
All plumbing and heating companies in Consett · All trades in Consett · Plumbers and heating engineers across the UK
Frequently asked questions
When are Zenith Mechanical Services Limited's accounts due?
Zenith Mechanical Services Limited's next accounts are due at Companies House by 30 September 2027 (in 353 days), covering the period to 31 December 2026.
When is Zenith Mechanical Services Limited'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 Zenith Mechanical Services Limited still trading?
Zenith Mechanical Services Limited is listed as active on the Companies House register (checked 12 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 Zenith Mechanical Services Limited do?
Zenith Mechanical Services Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Zenith Mechanical Services Limited?
Zenith Mechanical Services Limited was incorporated on 18 August 2017, 9 years ago.
Who runs Zenith Mechanical Services Limited?
Zenith Mechanical Services Limited has 2 active directors, the longest-serving appointed in Aug 2017. Their names and service addresses are on the Companies House register.
Who owns Zenith Mechanical Services Limited?
2 people or companies have significant control of Zenith Mechanical Services Limited: an individual (owns 25% to 50% of the shares); an individual (owns 25% to 50% of the shares).
Has Zenith Mechanical Services Limited won public sector contracts?
Yes. Zenith Mechanical Services Limited has 20 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £26M), most recently from NORTHUMBRIAN WATER LIMITED.
What is the penalty if Zenith 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 Zenith Mechanical Services Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.