- Company number
- 15557443
- Incorporated
- 12 Mar 20242 years trading
- Registered office
- Flat 18 Evershort Court, 44 Lyonsdown Road, Barnet, EN5 1SX
- Nature of business
- Construction of domestic buildings
Ajb Plumbing & Building Ltd is a 2-year-old private limited company registered in Barnet, company number 15557443, one of 201 building contractors in Barnet. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 31 March 2025, as filed at Companies House.
Who runs and owns Ajb Plumbing & Building Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| A*** B*** | Director | Mar 2024 |
Person with significant control
Where Ajb Plumbing & Building Ltd is registered
The registered office is in Barnet (EN5), in the Barnet local authority area, London. Show EN5 1SX on a map.
Other trade companies in EN5
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- Greatway Business LtdInstallers
- Je Mobile Tyres LtdMechanics and garages
- Barnet Air LtdPlumbers and heating engineers
- Hutch Electrical LtdElectricians
- Nexflow Mechanical LtdSpecialist contractors
- A J Plant LtdMotor traders
- Plumbing365 LtdPlumbers and heating engineers
What happens if Ajb Plumbing & Building 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 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 15557443
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 March 2024 (2 years ago)
- Registered office
- Flat 18 Evershort Court, 44 Lyonsdown Road, Barnet, EN5 1SX
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 11 March 2026
- Previous names
- Ajb Building Services Ltd (until 8 Oct 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 Barnet
Other active building contractors registered in Barnet.
- Alban Building Ltd2023
- Alex & Co. Property Care Ltd2025
- Alpha Home Improvements Ltd2021
- Als Construction Group Ltd2021
- Am Design & Build Arch Limited2025
- Amr BC Ltd2021
- Arrow London Builders Ltd2012
- Ashchurch Developments Limited1990
All building contractors in Barnet · All trades in Barnet · Builders across the UK
Frequently asked questions
When are Ajb Plumbing & Building Ltd's accounts due?
Ajb Plumbing & Building Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Ajb Plumbing & Building Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Ajb Plumbing & Building Ltd still trading?
Ajb Plumbing & Building 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 Ajb Plumbing & Building Ltd do?
Ajb Plumbing & Building Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Ajb Plumbing & Building Ltd?
Ajb Plumbing & Building Ltd was incorporated on 12 March 2024, 2 years ago.
Who runs Ajb Plumbing & Building Ltd?
Ajb Plumbing & Building Ltd has 1 active director, the longest-serving appointed in Mar 2024. Their names and service addresses are on the Companies House register.
Who owns Ajb Plumbing & Building Ltd?
One person or company has significant control of Ajb Plumbing & Building Ltd: an individual (owns 75% or more of the shares).
What is the penalty if Ajb Plumbing & Building 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 Ajb Plumbing & Building 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.