- Company number
- 14337265
- Incorporated
- 5 Sep 20224 years trading
- Registered office
- 18 Brookside South, East Barnet, Barnet, EN4 8LN
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings
4&J Construction Ltd is a 4-year-old private limited company registered in Barnet, company number 14337265, one of 201 building contractors in Barnet. Companies House shows its accounts as overdue: they were due on 30 June 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 £5,929 (+12.7%) on the year before, to £53K.
- Current assets of £63K against £31K owed within a year: 2.0 times cover.
- 1 employee on average, down from 3 the year before.
- 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 Sep 2024 | £53K | £63K | £31K | 1 | |
| 30 Sep 2023 | £47K | £41K | £15K | 3 |
Public contracts won
4&J Construction Ltd has one public sector contract award on record (2026). Source: Contracts Finder and Find a Tender award notices. For all of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| CDS Cooperatives | Repairs & Maintenance and Planned Works Services Framework | Ceiling, not shown | 20 Apr 2026 |
Where 4&J Construction Ltd is registered
The registered office is in Barnet (EN4), in the Barnet local authority area, London. Show EN4 8LN on a map.
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What happens if 4&J Construction Ltd files late
If the accounts reach Companies House today, the late filing penalty is £750 (£1,500 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 Jul 2026 to 31 Jul 2026 | £150 |
| 1 to 3 months late | 1 Aug 2026 to 30 Sep 2026 | £375 |
| 3 to 6 months late | 1 Oct 2026 to 31 Dec 2026 | £750 |
| More than 6 months late | From 1 Jan 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2026 | £200 |
| 3 months late | 30 Dec 2026 | another £200 |
| 6 months late | 30 Mar 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 14337265
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 September 2022 (4 years ago)
- Registered office
- 18 Brookside South, East Barnet, Barnet, EN4 8LN
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202) - Year end
- 30 September (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 September 2024
- Last confirmation statement
- 4 September 2026
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 Barnet
Other active building contractors registered in Barnet.
- 68-70 Bovill Road Freehold Limited2025
- A & B London Construction Services Limited2005
- A Martens Kitchens & Bathrooms Ltd2014
- Aa Metal Force Ltd2022
- Aan Electrical Services Ltd2020
- Adj Builders Limited2021
- Adrian and Sons Group Limited2025
- Af Contractors Ltd2022
All building contractors in Barnet · All trades in Barnet · Builders across the UK
Frequently asked questions
When are 4&J Construction Ltd's accounts due?
4&J Construction Ltd's accounts were due at Companies House on 30 June 2026 and the register shows them as overdue.
When is 4&J Construction Ltd's CT600 due?
The CT600 for the period to 30 September 2025 is due at HMRC by 30 September 2026, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2026.
Is 4&J Construction Ltd still trading?
4&J Construction Ltd 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 4&J Construction Ltd do?
4&J Construction Ltd is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202).
How old is 4&J Construction Ltd?
4&J Construction Ltd was incorporated on 5 September 2022, 4 years ago.
Has 4&J Construction Ltd won public sector contracts?
Yes. 4&J Construction Ltd has one contract award from public bodies on Contracts Finder and Find a Tender, most recently from CDS Cooperatives.
What is the penalty if 4&J Construction 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 4&J Construction Ltd 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.