- Companies
- Plumbers and heating engineers
- Stanmore
- MJJ Plumbing & Heating Limited
MJJ Plumbing & Heating Limited
- Company number
- 10693924
- Incorporated
- 28 Mar 20179 years trading
- Registered office
- Devonshire House, 582 Honeypot Lane, Stanmore, HA7 1JS
- Nature of business
- Plumbing, heat and air-conditioning installation
MJJ Plumbing & Heating Limited is a 9-year-old private limited company registered in Stanmore, company number 10693924, one of 50 plumbing and heating companies in Stanmore. 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.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for MJJ Plumbing & Heating LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £18K (+17.6%) on the year before, to £119K.
- Net assets rose in 7 of 8 year-on-year comparisons on record.
- Current assets of £127K against £31K owed within a year: 4.1 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 9 years, 2018 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £119K | £127K | £31K | 2 | |
| 31 Mar 2025 | £101K | £159K | £67K | 2 | |
| 31 Mar 2024 | £78K | £99K | £29K | 2 | |
| 31 Mar 2023 | £124K | £147K | £32K | 3 | |
| 31 Mar 2022 | £90K | £154K | £43K | 4 | |
| 31 Mar 2021 | £39K | £113K | £35K | 3 | |
| 31 Mar 2020 | £18K | £37K | £21K | 3 | |
| 31 Mar 2019 | £330 | £21K | £23K | ||
| 31 Mar 2018 | £100 | £5,659 | £8,946 |
Where MJJ Plumbing & Heating Limited is registered
The registered office is in Stanmore (HA7), in the Harrow local authority area, London. Show HA7 1JS on a map.
Other trade companies in HA7
- Vatra Developments LtdBuilders
- Air and Waves LtdPlumbers and heating engineers
- R & R Building Services LtdFinishing trades
- Berculean BBV Ltd LtdBuilders
- Velorent LtdMotor traders
- Autex LtdMechanics and garages
- TH Motorcycles LtdMotor traders
- Ady Painting and Decorating LtdInstallers
Shared registered office
113 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if MJJ Plumbing & Heating 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 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
- 10693924
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 March 2017 (9 years ago)
- Registered office
- Devonshire House, 582 Honeypot Lane, Stanmore, HA7 1JS
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 5 January 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 Stanmore
Other active plumbing and heating companies registered in Stanmore.
- MK Gasworks Ltd2024
- Murray Mechanical Services Limited2022
- Neil Guerin Gas Heating & Plumbing Limited2009
- P Donaghey Plumbing & Gas Limited2012
- Pat Brennan Pipe Fitters Ltd2005
- Plumb IT Services Ltd2025
- Plumbsafe London Ltd2025
- Premier Plumbing & Draining Ltd2026
All plumbing and heating companies in Stanmore · All trades in Stanmore · Plumbers and heating engineers across the UK
Frequently asked questions
When are MJJ Plumbing & Heating Limited's accounts due?
MJJ Plumbing & Heating Limited's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is MJJ Plumbing & Heating Limited'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 MJJ Plumbing & Heating Limited still trading?
MJJ Plumbing & Heating 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 MJJ Plumbing & Heating Limited do?
MJJ Plumbing & Heating Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is MJJ Plumbing & Heating Limited?
MJJ Plumbing & Heating Limited was incorporated on 28 March 2017, 9 years ago.
What is the penalty if MJJ Plumbing & Heating 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 MJJ Plumbing & Heating 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.