Company profile · Builders
J2 Build Ltd
J2 Build Ltd is a 5-year-old private limited company registered in London, company number 13054403, one of 12,075 building contractors in London. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 December 2025, as filed at Companies House.
J2 Build Ltd over the years
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 £5,966 (+14.5%) on the year before, to £47K.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £48K against £32K owed within a year: 1.5 times cover.
- 2 employees on average, down from 3 the year before.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £47K | £48K | £32K | 2 | |
| 31 Dec 2024 | £41K | £24K | £21K | 3 | |
| 31 Dec 2023 | £35K | £32K | £32K | 1 | |
| 31 Dec 2022 | £13K | £14K | £1,727 | 1 | |
| 31 Dec 2021 | £17K | £41K | £24K | 1 |
Where J2 Build Ltd is registered
The registered office is in London (NW11), in the Barnet local authority area, London. Show NW11 8JY on a map.
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What happens if J2 Build 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 13054403
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 December 2020 (5 years ago)
- Registered office
- 7 Golders Way, London, NW11 8JY
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202) - Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 30 November 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 London
Other active building contractors registered in London.
- J2 Civil Engineering Limited2026
- J23 Builders Limited2017
- J3 Pointing & Restoration Ltd2025
- Ja Construction Works Ltd2025
- Jaa7 Limited2020
- Jabal Alsafwa for Contracting and General Maintenance Ltd2026
- Jabbarson Construction Ltd2019
- Jabko Limited2023
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are J2 Build Ltd's accounts due?
J2 Build Ltd's next accounts are due at Companies House by 30 September 2027 (in 353 days), covering the period to 31 December 2026.
When is J2 Build Ltd's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is J2 Build Ltd still trading?
J2 Build 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 J2 Build Ltd do?
J2 Build Ltd is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202).
How old is J2 Build Ltd?
J2 Build Ltd was incorporated on 1 December 2020, 5 years ago.
What is the penalty if J2 Build 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 J2 Build 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.