- Companies
- Plumbers and heating engineers
- Forest Row
- Dmech Limited
Dmech Limited
- Company number
- 04650323
- Incorporated
- 28 Jan 200323 years trading
- Registered office
- 120 Hartfield Road, Forest Row, East Sussex, RH18 5LY
- Nature of business
- Plumbing, heat and air-conditioning installation
Dmech Limited is a 23-year-old private limited company registered in Forest Row, company number 04650323, one of the UK's plumbing and heating companies. Its next accounts are due at Companies House on 5 January 2027, and the CT600 for the period to 5 April 2026 is due at HMRC on 5 April 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 £760 on the year before, to £801.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £35K against £45K owed within a year: 0.8 times cover.
- 3 employees on average, down from 4 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 |
|---|---|---|---|---|---|
| 5 Apr 2025 | £801 | £0 | £35K | £45K | 3 |
| 5 Apr 2024 | £41 | £618 | £47K | £52K | 4 |
| 5 Apr 2023 | £149 | £15K | £58K | £47K | 4 |
| 5 Apr 2022 | £500 | £13K | £48K | £28K | 4 |
| 5 Apr 2021 | £134 | £10K | £40K | £13K | 3 |
| 5 Apr 2020 | £1,350 | £7,906 | £20K | £20K | 0 |
| 5 Apr 2019 | £2,626 | £12K | £30K | £29K | 0 |
| 5 Apr 2018 | £468 | £2,200 | £26K | £27K | 3 |
| 5 Apr 2017 | £794 | £2,206 | £23K | £24K | 0 |
| 5 Apr 2016 | £222 | £0 | £23K | £24K |
Where Dmech Limited is registered
The registered office is in Forest Row (RH18), in the Wealden local authority area, South East. Show RH18 5LY on a map.
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What happens if Dmech 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 5 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 6 Jan 2027 to 5 Feb 2027 | £150 |
| 1 to 3 months late | 6 Feb 2027 to 5 Apr 2027 | £375 |
| 3 to 6 months late | 6 Apr 2027 to 5 Jul 2027 | £750 |
| More than 6 months late | From 6 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 6 Apr 2027 | £200 |
| 3 months late | 5 Jul 2027 | another £200 |
| 6 months late | 5 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 5 Apr 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
- 04650323
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 January 2003 (23 years ago)
- Registered office
- 120 Hartfield Road, Forest Row, East Sussex, RH18 5LY
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 5 April (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 5 April 2025
- Last confirmation statement
- 28 January 2026
- Previous names
- DMCH Limited (until 8 Jun 2009)
D. Mullender Central Heating Limited (until 30 Oct 2008)
D. Mullender Plumbing Services Limited (until 23 Apr 2008)
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 Forest Row
Other active plumbing and heating companies registered in Forest Row.
All plumbing and heating companies in Forest Row · All trades in Forest Row · Plumbers and heating engineers across the UK
Frequently asked questions
When are Dmech Limited's accounts due?
Dmech Limited's next accounts are due at Companies House by 5 January 2027 (in 85 days), covering the period to 5 April 2026.
When is Dmech Limited's CT600 due?
The CT600 for the period to 5 April 2026 is due at HMRC by 5 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 6 January 2027.
Is Dmech Limited still trading?
Dmech 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 Dmech Limited do?
Dmech Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Dmech Limited?
Dmech Limited was incorporated on 28 January 2003, 23 years ago.
What is the penalty if Dmech 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 Dmech 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.