- Companies
- Civil engineering
- Kilmarnock
- Thorntonhall Civil Engineering Ltd
Thorntonhall Civil Engineering Ltd
- Company number
- SC891447
- Incorporated
- 1 Jun 2026
- Registered office
- 13 Sidlaw Place, Kilmarnock, KA1 3UN
- Nature of business
- Construction of other civil engineering projects n.e.c.
Thorntonhall Civil Engineering Ltd is a newly incorporated private limited company registered in Kilmarnock, company number SC891447, one of 50 civil engineering contractors in Kilmarnock. Its next accounts are due at Companies House on 1 March 2028, and its first CT600 is due at HMRC on 31 May 2028.
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 Thorntonhall Civil Engineering Ltd is registered
The registered office is in Kilmarnock (KA1), in the East Ayrshire local authority area, Scotland. Show KA1 3UN on a map.
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What happens if Thorntonhall Civil Engineering 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 March 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 2 Mar 2028 to 1 Apr 2028 | £150 |
| 1 to 3 months late | 2 Apr 2028 to 1 Jun 2028 | £375 |
| 3 to 6 months late | 2 Jun 2028 to 1 Sep 2028 | £750 |
| More than 6 months late | From 2 Sep 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2028 | £200 |
| 3 months late | 30 Sep 2028 | another £200 |
| 6 months late | 30 Dec 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- SC891447
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 June 2026
- Registered office
- 13 Sidlaw Place, Kilmarnock, KA1 3UN
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 30 June (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 Kilmarnock
Other active civil engineering contractors registered in Kilmarnock.
- Track Civil Engineering Solutions Ltd2022
- Underground Utilities Limited2024
- Walkers 101 Services Ltd2020
- Westlin Rail Ltd2014
- William Smith Engineering Limited2021
- WK Contracts Limited2015
- Wreckansignalling Ltd2025
- Young Civils and Fencing Ltd2025
All civil engineering contractors in Kilmarnock · All trades in Kilmarnock · Civil engineering across the UK
Frequently asked questions
When are Thorntonhall Civil Engineering Ltd's accounts due?
Thorntonhall Civil Engineering Ltd's next accounts are due at Companies House by 1 March 2028 (in 505 days), covering the period to 30 June 2027.
When is Thorntonhall Civil Engineering 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 May 2027, due by 31 May 2028, and one for the period to 30 June 2027, due by 30 June 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Thorntonhall Civil Engineering Ltd still trading?
Thorntonhall Civil Engineering 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 Thorntonhall Civil Engineering Ltd do?
Thorntonhall Civil Engineering Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Thorntonhall Civil Engineering Ltd?
Thorntonhall Civil Engineering Ltd was incorporated on 1 June 2026, less than a year ago.
What is the penalty if Thorntonhall Civil Engineering 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 Thorntonhall Civil Engineering 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.