- Company number
- 12281746
- Incorporated
- 25 Oct 20196 years trading
- Registered office
- C/O Advantax Accountants Ltd, Aurora House, 71-75 Uxbridge Road, Ealing, W5 5SL
- Nature of business
- Construction of domestic buildings
M J Builders (London) Ltd is a 6-year-old private limited company registered in Ealing, company number 12281746, one of 19 building contractors in Ealing. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 down £25 (-0.1%) on the year before, to £29K.
- Net assets rose in 3 of 5 year-on-year comparisons on record.
- Current assets of £27K against £25K owed within a year: 1.1 times cover.
- 2 employees on average during the year.
- 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 |
|---|---|---|---|---|---|
| 31 Oct 2025 | £29K | £1,749 | £27K | £25K | 2 |
| 31 Oct 2024 | £29K | £6,159 | £154K | £154K | 2 |
| 31 Oct 2023 | £22K | £9,014 | £76K | £88K | 2 |
| 31 Oct 2022 | £5,262 | £28K | £49K | £80K | 2 |
| 31 Oct 2021 | £42K | £15K | £19K | £61K | 2 |
| 31 Oct 2020 | £2,010 | £16K | £13K | 3 |
Where M J Builders (London) Ltd is registered
The registered office is in Ealing (W5), in the Ealing local authority area, London. Show W5 5SL on a map.
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Also registered at this address
10 other companies use the same registered office as M J Builders (London) Ltd.
- Am Exterior Cleaning Solutions LtdCleaning companies
- Clear Flow Maintenance LtdPlumbers and heating engineers
- Come2Help LtdPainters and decorators
- Excelsiorfm LtdFacilities management
- LED Factory LimitedElectricians
- Omnious Construction LtdProperty developers
- Renovision LtdBuilders
- Tailor Care LtdCleaning companies
- TM Home Improvement Services LtdProperty developers
- Tunecar Solutions LtdMechanics and garages
What happens if M J Builders (London) 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 12281746
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 October 2019 (6 years ago)
- Registered office
- C/O Advantax Accountants Ltd, Aurora House, 71-75 Uxbridge Road, Ealing, W5 5SL
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 24 October 2025
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Ealing
Other active building contractors registered in Ealing.
- Magic Box Systems Limited1994
- Miva Design and Build Ltd2026
- Modal Maintenance and Construction Limited2021
- Mohan Real Estate Limited2020
- MS-Builders Services Ltd2021
- Nexstructure Ltd2025
- Project 1 Design & Build Limited2007
- Remont Group Ltd2025
All building contractors in Ealing · All trades in Ealing · Builders across the UK
Frequently asked questions
When are M J Builders (London) Ltd's accounts due?
M J Builders (London) Ltd's next accounts are due at Companies House by 31 July 2027 (in 290 days), covering the period to 31 October 2026.
When is M J Builders (London) Ltd's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is M J Builders (London) Ltd still trading?
M J Builders (London) 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 M J Builders (London) Ltd do?
M J Builders (London) Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is M J Builders (London) Ltd?
M J Builders (London) Ltd was incorporated on 25 October 2019, 6 years ago.
What is the penalty if M J Builders (London) 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 M J Builders (London) 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.