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- JLN Construction Limited
Company profile · Builders
JLN Construction Limited
JLN Construction Limited is a 6-year-old private limited company registered in Merthyr Tydfil, company number 12510443, one of 39 building contractors in Merthyr Tydfil. 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.
JLN Construction Limited 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 down £12 (-0%) on the year before, to £26K.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £36K against £21K owed within a year: 1.7 times cover.
- 3 employees on average, up from 0 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 Mar 2025 | £26K | £36K | £21K | 3 | |
| 31 Mar 2024 | £26K | £38K | £23K | 0 | |
| 31 Mar 2023 | £17K | £28K | £15K | 0 | |
| 31 Mar 2022 | £3,968 | £14K | £9,983 | 0 | |
| 31 Mar 2021 | £3 | £3 | £0 | 0 |
Where JLN Construction Limited is registered
The registered office is in Merthyr Tydfil (CF47), in the Merthyr Tydfil local authority area, Wales. Show CF47 8PB on a map.
Other trade companies in CF47
- Rji Services LtdMechanics and garages
- R&P Motor Services LtdMechanics and garages
- Grain and Groove Carpentry LtdJoiners and carpenters
- Nextnest Properties LimitedProperty developers
- Frontier Power Solutions LtdElectricians
- Jude Developments LtdProperty developers
- Taff Group Property Services LtdPainters and decorators
- Anew Energy LimitedPlumbers and heating engineers
What happens if JLN Construction 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 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
- 12510443
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 March 2020 (6 years ago)
- Registered office
- 34 Pandy Close, Merthyr Tydfil, CF47 8PB
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of roads and motorways (SIC 42110) - Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 24 September 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 Merthyr Tydfil
Other active building contractors registered in Merthyr Tydfil.
- Jones Building Ltd2017
- Lewis Falkiner Properties Limited2016
- LLC Services Limited2019
- Luke Dummett Bricklaying Ltd2016
- LW Housing Refurbishments Ltd2018
- Mad Developments and Construction Ltd2026
- Maple Leaf Design & Build Ltd2026
- Matcon Civil Engineering Ltd2010
All building contractors in Merthyr Tydfil · All trades in Merthyr Tydfil · Builders across the UK
Frequently asked questions
When are JLN Construction Limited's accounts due?
JLN Construction Limited's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is JLN Construction Limited'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 JLN Construction Limited still trading?
JLN Construction Limited is listed as active on the Companies House register (checked 12 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 JLN Construction Limited do?
JLN Construction Limited is registered under Construction of commercial buildings (SIC 41201); Construction of roads and motorways (SIC 42110).
How old is JLN Construction Limited?
JLN Construction Limited was incorporated on 11 March 2020, 6 years ago.
What is the penalty if JLN Construction 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 JLN Construction Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.