- Companies
- Plumbers and heating engineers
- High Wycombe
- MJF Ductwork Ltd
MJF Ductwork Ltd
- Company number
- 06221336
- Incorporated
- 20 Apr 200719 years trading
- Registered office
- 85 Deeds Grove, High Wycombe, Bucks, HP12 3NY
- Nature of business
- Plumbing, heat and air-conditioning installation
MJF Ductwork Ltd is a 19-year-old private limited company registered in High Wycombe, company number 06221336, one of 120 plumbing and heating companies in High Wycombe. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
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 down £43K (-33.2%) on the year before, to £87K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £164K against £78K owed within a year: 2.1 times cover.
- 3 employees on average, up from 0 the year before.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £87K | £91K | £164K | £78K | 3 |
| 31 Mar 2025 | £130K | £104K | £216K | £87K | 0 |
| 31 Mar 2024 | £81K | £69K | £130K | £47K | 0 |
| 31 Mar 2023 | £27K | £17K | £80K | £64K | 0 |
| 31 Mar 2022 | £34K | £17K | £86K | £64K | 2 |
| 31 Mar 2021 | £119K | £43K | £204K | £108K | 2 |
| 31 Mar 2020 | £154K | £58K | £252K | £107K | |
| 31 Mar 2019 | £51K | £14K | £104K | £47K | |
| 31 Mar 2018 | £40K | £7,345 | £66K | £27K | |
| 31 Mar 2017 | £65K | £29K | £150K | £86K |
Public contracts won
MJF Ductwork Ltd has 2 public sector contract awards on record; the ones with their own published value total £28K, from 2024 to 2025. Source: Contracts Finder and Find a Tender award notices. 1 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- UK Research and Innovation1 award
- UK Shared Business Services Limited1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| UK Research and Innovation | CSP25530 - Ductwork | £11K | 31 Oct 2025 |
| UK Shared Business Services Limited | BE24078 - Ventilation System Works | £18K | 21 Mar 2024 |
Where MJF Ductwork Ltd is registered
The registered office is in High Wycombe (HP12), in the Buckinghamshire local authority area, South East. Show HP12 3NY on a map.
Other trade companies in HP12
- Ta Repairs and Courier LtdMechanics and garages
- Precision Bodyworkz LimitedMechanics and garages
- Rha Developers LtdProperty developers
- Trade Cars Ukk LimitedMotor traders
- VMD Carpentry LtdProperty developers
- Ah New Tyres LtdMotor traders
- Georges Auto Repair LtdMechanics and garages
- Smart Breeze LimitedElectricians
What happens if MJF Ductwork 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 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2029 | 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
- 06221336
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 April 2007 (19 years ago)
- Registered office
- 85 Deeds Grove, High Wycombe, Bucks, HP12 3NY
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 25 July 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 High Wycombe
Other active plumbing and heating companies registered in High Wycombe.
- MRB Heating and Plumbing Limited2015
- NB Gas & Heating Ltd2021
- NBB Energy Ltd2010
- Neil's Refrigeration Services Ltd.2007
- Noor & Sons Plumbing & Heating Limited2023
- O'Connor Mechanical Services Ltd2026
- On Tap Solutions Ltd2024
- Opulence Bathrooms and Heating Systems Ltd2025
All plumbing and heating companies in High Wycombe · All trades in High Wycombe · Plumbers and heating engineers across the UK
Frequently asked questions
When are MJF Ductwork Ltd's accounts due?
MJF Ductwork Ltd's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is MJF Ductwork Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is MJF Ductwork Ltd still trading?
MJF Ductwork 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 MJF Ductwork Ltd do?
MJF Ductwork Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is MJF Ductwork Ltd?
MJF Ductwork Ltd was incorporated on 20 April 2007, 19 years ago.
Has MJF Ductwork Ltd won public sector contracts?
Yes. MJF Ductwork Ltd has 2 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £28K), most recently from UK Research and Innovation.
What is the penalty if MJF Ductwork 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 MJF Ductwork 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.