- Companies
- Plumbers and heating engineers
- London
- Dam Mechanical Limited
Dam Mechanical Limited
- Company number
- 14502699
- Incorporated
- 23 Nov 20223 years trading
- Registered office
- 21 Whitton, 89 King Henrys Road, London, NW3 3RE
- Nature of business
- Plumbing, heat and air-conditioning installation
Dam Mechanical Limited is a 3-year-old private limited company registered in London, company number 14502699, one of 2,972 plumbing and heating companies in London. Companies House shows its accounts as overdue: they were due on 31 August 2026.
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 £1,990 (+219.4%) on the year before, to £1,083.
- Current assets of £53K against £50K owed within a year: 1.1 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 2 years, 2023 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2024 | £1,083 | £53K | £50K | 1 | |
| 30 Nov 2023 | -£907 | £27K | £28K | 1 |
Where Dam Mechanical Limited is registered
The registered office is in London (NW3), in the Camden local authority area, London. Show NW3 3RE on a map.
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What happens if Dam Mechanical Limited files late
If the accounts reach Companies House today, the late filing penalty is £375 (£750 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2026 to 30 Sep 2026 | £150 |
| 1 to 3 months late | 1 Oct 2026 to 30 Nov 2026 | £375 |
| 3 to 6 months late | 1 Dec 2026 to 28 Feb 2027 | £750 |
| More than 6 months late | From 1 Mar 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2026 | £200 |
| 3 months late | 28 Feb 2027 | another £200 |
| 6 months late | 30 May 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 2027 | 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
- 14502699
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 November 2022 (3 years ago)
- Registered office
- 21 Whitton, 89 King Henrys Road, London, NW3 3RE
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2024
- Last confirmation statement
- 22 November 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 London
Other active plumbing and heating companies registered in London.
- Dami Mechanical Ltd2026
- Damp - Mould - Leak Detection Ltd2025
- Dan Plumming Ltd2020
- Danileica Private Plumbers Ltd2021
- Danis Plumbing & Heating Ltd2025
- Danni Plumbing Ltd2026
- Danplumbing Ltd2025
- Danskin Plumbing and Heating Ltd2026
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Dam Mechanical Limited's accounts due?
Dam Mechanical Limited's accounts were due at Companies House on 31 August 2026 and the register shows them as overdue.
When is Dam Mechanical Limited's CT600 due?
The CT600 for the period to 30 November 2025 is due at HMRC by 30 November 2026, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2026.
Is Dam Mechanical Limited still trading?
Dam Mechanical Limited is listed as active on the Companies House register (checked 13 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 Dam Mechanical Limited do?
Dam Mechanical Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Dam Mechanical Limited?
Dam Mechanical Limited was incorporated on 23 November 2022, 3 years ago.
What is the penalty if Dam Mechanical 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 Dam Mechanical Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.