- Companies
- Civil engineering
- Hemel Hempstead
- J Dunn Civils Ltd
J Dunn Civils Ltd
- Company number
- 16687161
- Incorporated
- 1 Sep 20251 year trading
- Registered office
- 75 Cuffley Court, Hemel Hempstead, HP2 7LS
- Nature of business
- Construction of other civil engineering projects n.e.c.
J Dunn Civils Ltd is a 1-year-old private limited company registered in Hemel Hempstead, company number 16687161, one of 50 civil engineering contractors in Hemel Hempstead. Its next accounts are due at Companies House on 1 June 2027, and its first CT600 is due at HMRC on 31 August 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 J Dunn Civils Ltd is registered
The registered office is in Hemel Hempstead (HP2), in the Dacorum local authority area, East of England. Show HP2 7LS on a map.
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What happens if J Dunn Civils 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 1 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 2 Jun 2027 to 1 Jul 2027 | £150 |
| 1 to 3 months late | 2 Jul 2027 to 1 Sep 2027 | £375 |
| 3 to 6 months late | 2 Sep 2027 to 1 Dec 2027 | £750 |
| More than 6 months late | From 2 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 16687161
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 September 2025 (1 year ago)
- Registered office
- 75 Cuffley Court, Hemel Hempstead, HP2 7LS
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 30 September (accounting reference date)
- Accounts type
- No accounts filed yet
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 Hemel Hempstead
Other active civil engineering contractors registered in Hemel Hempstead.
- J&J Palmer Groundworks Limited2005
- Jackweld Limited2006
- Lorimer-O'Neill Grab & Groundworks Ltd2024
- M Coyne Supplies Ltd2019
- M-Delf, Civil Engineering Ltd2024
- Mail Civils Ltd2025
- Martin M Limited2015
- Maytree Limited2002
All civil engineering contractors in Hemel Hempstead · All trades in Hemel Hempstead · Civil engineering across the UK
Frequently asked questions
When are J Dunn Civils Ltd's accounts due?
J Dunn Civils Ltd's next accounts are due at Companies House by 1 June 2027 (in 231 days), covering the period to 30 September 2026.
When is J Dunn Civils 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 31 August 2026, due by 31 August 2027, and one for the period to 30 September 2026, due by 30 September 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is J Dunn Civils Ltd still trading?
J Dunn Civils Ltd is listed as active on the Companies House register (checked 13 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 Dunn Civils Ltd do?
J Dunn Civils Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is J Dunn Civils Ltd?
J Dunn Civils Ltd was incorporated on 1 September 2025, 1 year ago.
What is the penalty if J Dunn Civils 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 J Dunn Civils Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.