- Companies
- Civil engineering
- London
- Jarnc Construction Ltd
Jarnc Construction Ltd
- Company number
- 16606716
- Incorporated
- 25 Jul 20251 year trading
- Registered office
- 20 Wenlock Road, London, N1 7GU
- Nature of business
- Construction of water projects; Other construction installation
Jarnc Construction Ltd is a 1-year-old private limited company registered in London, company number 16606716, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 25 April 2027, and its first CT600 is due at HMRC on 24 July 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Jarnc Construction Ltd is registered
The registered office is in London (N1), in the Hackney local authority area, London. Show N1 7GU on a map.
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Shared registered office
1,583 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Jarnc Construction 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 25 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 26 Apr 2027 to 25 May 2027 | £150 |
| 1 to 3 months late | 26 May 2027 to 25 Jul 2027 | £375 |
| 3 to 6 months late | 26 Jul 2027 to 25 Oct 2027 | £750 |
| More than 6 months late | From 26 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 16606716
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 July 2025 (1 year ago)
- Registered office
- 20 Wenlock Road, London, N1 7GU
- Nature of business
- Construction of water projects (SIC 42910)
Other construction installation (SIC 43290) - Year end
- 31 July (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 24 July 2026
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in London
Other active civil engineering contractors registered in London.
- Jaron Services Ltd2015
- Jarr Build Ltd2023
- JB Tilers Ltd2013
- JCM Utilities Ltd2018
- Jcoops Ltd2024
- JCR Communications Ltd2022
- JCS Engineering Services Limited2025
- JD Lucas Ltd2015
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are Jarnc Construction Ltd's accounts due?
Jarnc Construction Ltd's next accounts are due at Companies House by 25 April 2027 (in 195 days), covering the period to 31 July 2026.
When is Jarnc Construction Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 24 July 2026, due by 24 July 2027, and one for the period to 31 July 2026, due by 31 July 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Jarnc Construction Ltd still trading?
Jarnc Construction 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 Jarnc Construction Ltd do?
Jarnc Construction Ltd is registered under Construction of water projects (SIC 42910); Other construction installation (SIC 43290).
How old is Jarnc Construction Ltd?
Jarnc Construction Ltd was incorporated on 25 July 2025, 1 year ago.
What is the penalty if Jarnc 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 Jarnc Construction 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.