- Companies
- Plumbers and heating engineers
- Hemel Hempstead
- Dey Mechanical Services Ltd
Dey Mechanical Services Ltd
- Company number
- 10230076
- Incorporated
- 14 Jun 201610 years trading
- Registered office
- 45 Long John, Hemel Hempstead, HP3 9LR
- Nature of business
- Plumbing, heat and air-conditioning installation
Dey Mechanical Services Ltd is a 10-year-old private limited company registered in Hemel Hempstead, company number 10230076, one of 89 plumbing and heating companies in Hemel Hempstead. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 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 £18K (+196%) on the year before, to £27K.
- Net assets rose in 4 of 8 year-on-year comparisons on record.
- 1 employee on average, up from 0 the year before.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | £27K | £57K | £70K | 1 | |
| 30 Jun 2024 | £9,185 | £9,185 | 0 | ||
| 30 Jun 2023 | £100 | £100 | 0 | ||
| 30 Jun 2022 | £3,819 | £3,819 | 0 | ||
| 30 Jun 2021 | -£48K | £1,986 | 2 | ||
| 30 Jun 2020 | £1,219 | £1,119 | 1 | ||
| 30 Jun 2019 | £8,497 | ||||
| 30 Jun 2018 | £100 | ||||
| 30 Jun 2017 | £100 |
Who runs and owns Dey Mechanical Services Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| A*** G*** | Director | Jun 2016 |
Person with significant control
Where Dey Mechanical Services Ltd is registered
The registered office is in Hemel Hempstead (HP3), in the Dacorum local authority area, East of England. Show HP3 9LR on a map.
Other trade companies in HP3
- G-Force Plumbing & Heating Contractors LimitedPlumbers and heating engineers
- Primeline Property Solutions LtdRoofers
- Elite Roof Repairs LtdRoofers
- Connor Air LimitedPlumbers and heating engineers
- Irv Services LtdInstallers
- Herts Number Plates LtdMotor traders
- RH Design and Electrical LtdBuilders
- Ejc Plumbing LtdPlumbers and heating engineers
What happens if Dey Mechanical Services 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 31 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 10230076
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 June 2016 (10 years ago)
- Registered office
- 45 Long John, Hemel Hempstead, HP3 9LR
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 1 June 2026
- Previous names
- Dey Instalation & Heating Ltd (until 19 Feb 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 Hemel Hempstead
Other active plumbing and heating companies registered in Hemel Hempstead.
- DK Heating & Plumbing Services Ltd2021
- DLG Plumbing & Heating Ltd2025
- Donald Heating & Plumbing Services Limited2023
- DSC Heating Limited2020
- Easyjetting Solutions Limited2021
- Eco Therm Heating Ltd2023
- Ejc Plumbing Ltd2026
- Em Plumbing Services Ltd2024
All plumbing and heating companies in Hemel Hempstead · All trades in Hemel Hempstead · Plumbers and heating engineers across the UK
Frequently asked questions
When are Dey Mechanical Services Ltd's accounts due?
Dey Mechanical Services Ltd's next accounts are due at Companies House by 31 March 2027 (in 170 days), covering the period to 30 June 2026.
When is Dey Mechanical Services Ltd's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Dey Mechanical Services Ltd still trading?
Dey Mechanical Services 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 Dey Mechanical Services Ltd do?
Dey Mechanical Services Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Dey Mechanical Services Ltd?
Dey Mechanical Services Ltd was incorporated on 14 June 2016, 10 years ago.
Who runs Dey Mechanical Services Ltd?
Dey Mechanical Services Ltd has 1 active director, the longest-serving appointed in Jun 2016. Their names and service addresses are on the Companies House register.
Who owns Dey Mechanical Services Ltd?
One person or company has significant control of Dey Mechanical Services Ltd: an individual (owns 75% or more of the shares).
What is the penalty if Dey Mechanical Services 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 Dey Mechanical Services 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.