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- Highflow Mechanical Ltd
Company profile · Plumbers and heating engineers
Highflow Mechanical Ltd
Highflow Mechanical Ltd is a 6-year-old private limited company registered in Dartford, company number 12312998, one of 121 plumbing and heating companies in Dartford. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 30 November 2025, as filed at Companies House.
Highflow Mechanical Ltd over the years
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 £28K (+75.7%) on the year before, to £65K.
- Net assets rose in 3 of 5 year-on-year comparisons on record.
- Current assets of £96K against £61K owed within a year: 1.6 times cover.
- 4 employees on average, up from 2 the year before.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £65K | £43K | £96K | £61K | 4 |
| 30 Nov 2024 | £37K | £2,214 | £202K | £206K | 2 |
| 30 Nov 2023 | £130K | £43K | £245K | £84K | 2 |
| 30 Nov 2022 | £121K | £160K | £337K | £151K | 2 |
| 30 Nov 2021 | £100K | £145K | £344K | £261K | 2 |
| 30 Nov 2020 | £100K | £88K | £244K | £165K | 2 |
Where Highflow Mechanical Ltd is registered
The registered office is in Dartford (DA1), in the Dartford local authority area, South East. Show DA1 2EU on a map.
Other trade companies in DA1
- Unit 6 Bespoke LtdSpecialist contractors
- Smartlifting LtdBuilders
- Degrees Bespoke Finishes LtdPlasterers
- A & A Electrical and Refrigeration LtdBuilders
- Elm Servicing LtdMachinery repair and installation
- WND Refrigeration LimitedPlumbers and heating engineers
- Moore Flooring and Sons LtdFloor and wall tilers
- Kinergy Systems LtdElectricians
What happens if Highflow 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 12312998
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 November 2019 (6 years ago)
- Registered office
- Top Floor, West Hill House, West Hill, Dartford, Kent, DA1 2EU
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
Information technology consultancy activities (SIC 62020) - Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 17 August 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 Dartford
Other active plumbing and heating companies registered in Dartford.
- Hillier's Heating & Plumbing Ltd2022
- Horizon P&H Ltd2021
- Jaguar Plumbing Ltd2022
- JCP Heating & Gas Ltd2018
- JJB Heating & Cooling Ltd2012
- JK Cooling Maintenance Ltd2026
- JNB Fire Limited2023
- KDPH Ltd2018
All plumbing and heating companies in Dartford · All trades in Dartford · Plumbers and heating engineers across the UK
Frequently asked questions
When are Highflow Mechanical Ltd's accounts due?
Highflow Mechanical Ltd's next accounts are due at Companies House by 31 August 2027 (in 323 days), covering the period to 30 November 2026.
When is Highflow Mechanical Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Highflow Mechanical Ltd still trading?
Highflow 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 Highflow Mechanical Ltd do?
Highflow Mechanical Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220); Information technology consultancy activities (SIC 62020).
How old is Highflow Mechanical Ltd?
Highflow Mechanical Ltd was incorporated on 13 November 2019, 6 years ago.
What is the penalty if Highflow 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 Highflow 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.