- Companies
- Plumbers and heating engineers
- Watford
- DPH Mechanical Ltd
DPH Mechanical Ltd
- Company number
- 10233653
- Incorporated
- 15 Jun 201610 years trading
- Registered office
- 23 Kensington Avenue, Watford, WD18 7RZ
- Nature of business
- Plumbing, heat and air-conditioning installation
DPH Mechanical Ltd is a 10-year-old private limited company registered in Watford, company number 10233653, one of 124 plumbing and heating companies in Watford. 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 £782 (+21.6%) on the year before, to £4,400.
- Net assets rose in 4 of 8 year-on-year comparisons on record.
- Current assets of £12K against £7,995 owed within a year: 1.6 times cover.
- 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 | £4,400 | £110K | £12K | £7,995 | 1 |
| 30 Jun 2024 | £3,618 | £3,618 | 0 | ||
| 30 Jun 2023 | £100 | £100 | 0 | ||
| 30 Jun 2022 | £100 | £100 | 0 | ||
| 30 Jun 2021 | -£48K | £1,988 | 0 | ||
| 30 Jun 2020 | £3,118 | £3,018 | 1 | ||
| 30 Jun 2019 | £100 | ||||
| 30 Jun 2018 | £100 | ||||
| 30 Jun 2017 | £100 |
Where DPH Mechanical Ltd is registered
The registered office is in Watford (WD18), in the Watford local authority area, East of England. Show WD18 7RZ on a map.
Other trade companies in WD18
- Aston Contractors LimitedInstallers
- Basky 613 LtdProperty developers
- M&E Motors LtdMotor traders
- Jeservicesgroup LtdBuilders
- RCK’S Car Wash Ltd LtdMechanics and garages
- S Buildx LtdBuilders
- CDP Mechanical Contracting LtdPlumbers and heating engineers
- Lane Commercial LtdCivil engineering
Also registered at this address
1 other company uses the same registered office as DPH Mechanical Ltd.
- CDP Mechanical Contracting LtdPlumbers and heating engineers
What happens if DPH Mechanical 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
- 10233653
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 June 2016 (10 years ago)
- Registered office
- 23 Kensington Avenue, Watford, WD18 7RZ
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 14 June 2026
- Previous names
- Dragos Plumbing and Heating Ltd (until 18 Jan 2024)
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 Watford
Other active plumbing and heating companies registered in Watford.
- E&E Heating and Plumbing Ltd2020
- Ek Hydro-Tech Pro Limited2022
- Em Plumbing and Heat Ltd2024
- Eva Plumbing Ltd2022
- Everstead Building Services Ltd2026
- Excel Maintenance Services Ltd2016
- Flow Speed Plumbing Ltd2025
- Flowtech Commissioning Limited2016
All plumbing and heating companies in Watford · All trades in Watford · Plumbers and heating engineers across the UK
Frequently asked questions
When are DPH Mechanical Ltd's accounts due?
DPH Mechanical 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 DPH Mechanical 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 DPH Mechanical Ltd still trading?
DPH Mechanical 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 DPH Mechanical Ltd do?
DPH Mechanical Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is DPH Mechanical Ltd?
DPH Mechanical Ltd was incorporated on 15 June 2016, 10 years ago.
What is the penalty if DPH Mechanical 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 DPH Mechanical 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.