- Company number
- 12503648
- Incorporated
- 9 Mar 20206 years trading
- Registered office
- 297 Lansdowne Road, Cardiff, CF5 1JR
- Nature of business
- Construction of domestic buildings
J B Construction & Carpentry Wales Limited is a 6-year-old private limited company registered in Cardiff, company number 12503648, one of 361 building contractors in Cardiff. 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 J B Construction & Carpentry Wales 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 £40K (+371.6%) on the year before, to £29K.
- Net assets rose in 2 of 5 year-on-year comparisons on record.
- Current assets of £112K against £123K owed within a year: 0.9 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 6 years, 2021 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £29K | £21K | £112K | £123K | 3 |
| 31 Mar 2025 | -£11K | £11K | £95K | £126K | 3 |
| 31 Mar 2024 | £7,610 | £6,646 | £95K | £102K | 3 |
| 31 Mar 2023 | £24K | £9,187 | £136K | £131K | 3 |
| 31 Mar 2022 | £5,786 | £0 | £39K | £57K | 3 |
| 31 Mar 2021 | £12K | £20K | £20K | £16K | 1 |
Who runs and owns J B Construction & Carpentry Wales Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| J*** B*** | Director | Mar 2020 |
1 former officer
| Name | Role | Appointed | Left |
|---|---|---|---|
| L*** B*** | Director | Mar 2020 | Mar 2024 |
Person with significant control
Where J B Construction & Carpentry Wales Limited is registered
The registered office is in Cardiff (CF5), in the Cardiff local authority area, Wales. Show CF5 1JR on a map.
Other trade companies in CF5
- Art Electrical Solutions LimitedElectricians
- Chapman Construction Cardiff LtdBuilders
- MN Projects Co. LtdBuilders
- Bridge Deck Solutions LtdCivil engineering
- Gilps Construction LtdPainters and decorators
- CF Window Cleaning LtdCleaning companies
- RK Fire and Electrical LtdElectricians
- BDL Cleaning LtdCleaning companies
What happens if J B Construction & Carpentry Wales 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
- 12503648
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 March 2020 (6 years ago)
- Registered office
- 297 Lansdowne Road, Cardiff, CF5 1JR
- 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 2026
- Last confirmation statement
- 8 March 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 Cardiff
Other active building contractors registered in Cardiff.
- J B Souto Limited2023
- J T Molloy Limited2017
- J&S Builders Ltd2026
- J. Carroll Limited2000
- Jacksalt Construction Limited2025
- Jaf (Yeovil) Limited2006
- Jafa Construction Ltd2026
- James Bricklaying Contractors Limited2019
All building contractors in Cardiff · All trades in Cardiff · Builders across the UK
Frequently asked questions
When are J B Construction & Carpentry Wales Limited's accounts due?
J B Construction & Carpentry Wales 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 J B Construction & Carpentry Wales 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 J B Construction & Carpentry Wales Limited still trading?
J B Construction & Carpentry Wales 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 J B Construction & Carpentry Wales Limited do?
J B Construction & Carpentry Wales Limited is registered under Construction of domestic buildings (SIC 41202).
How old is J B Construction & Carpentry Wales Limited?
J B Construction & Carpentry Wales Limited was incorporated on 9 March 2020, 6 years ago.
Who runs J B Construction & Carpentry Wales Limited?
J B Construction & Carpentry Wales Limited has 1 active director, the longest-serving appointed in Mar 2020. Their names and service addresses are on the Companies House register.
Who owns J B Construction & Carpentry Wales Limited?
One person or company has significant control of J B Construction & Carpentry Wales Limited: an individual (owns 25% to 50% of the shares).
What is the penalty if J B Construction & Carpentry Wales 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 J B Construction & Carpentry Wales 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.