- Companies
- Civil engineering
- Thurso
- Cowan Plant Strathy Limited
Cowan Plant Strathy Limited
- Company number
- SC464419
- Incorporated
- 25 Nov 201312 years trading
- Registered office
- Free Church Manse, Strathy, Thurso, Caithness, KW14 7RZ
- Nature of business
- Construction of roads and motorways
Cowan Plant Strathy Limited is a 12-year-old private limited company registered in Thurso, company number SC464419, one of 6 civil engineering contractors in Thurso. Companies House shows its accounts as overdue: they were due on 30 September 2025.
Key dates
Worked out from the year end and filing history on the Companies House register.
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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 £7,378 (+33.9%) on the year before, to -£14K.
- Net assets rose in 5 of 8 year-on-year comparisons on record.
- Current assets of £71K against £174K owed within a year: 0.4 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 9 years, 2015 to 2023.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2023 | -£14K | £95 | £71K | £174K | 3 |
| 31 Dec 2022 | -£22K | £221 | £59K | £158K | 3 |
| 31 Dec 2021 | £40K | £11K | £81K | £150K | 3 |
| 31 Dec 2020 | £75K | £10K | £67K | £131K | 3 |
| 31 Dec 2019 | £145K | £16K | £169K | £138K | 2 |
| 31 Dec 2018 | £117K | £5,370 | £197K | £239K | 3 |
| 31 Dec 2017 | £105K | £5,114 | £219K | £264K | 3 |
| 31 Dec 2016 | £67K | £70 | £162K | £220K | 3 |
| 31 Dec 2015 | £1,613 | £13K | £30K | £67K | 1 |
Where Cowan Plant Strathy Limited is registered
The registered office is in Thurso (KW14), in the Highland local authority area, Scotland. Show KW14 7RZ on a map.
Other trade companies in KW14
- M.A.S Mechanical Services LtdMechanics and garages
- Oas Scaffolding Services LtdScaffolders
- Ran Mac Safety Solutions LtdSpecialist contractors
- Macleod Scaffolding LtdScaffolders
- George Macgregor LtdSpecialist contractors
- C&KC Services LtdScaffolders
- Grid Energy Services LtdCivil engineering
- Pure Glass 4U LtdCleaning companies
What happens if Cowan Plant Strathy Limited files late
If the accounts reach Companies House today, the late filing penalty is £1,500 (£3,000 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2025 to 31 Oct 2025 | £150 |
| 1 to 3 months late | 1 Nov 2025 to 31 Dec 2025 | £375 |
| 3 to 6 months late | 1 Jan 2026 to 31 Mar 2026 | £750 |
| More than 6 months late | From 1 Apr 2026 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2026 | £200 |
| 3 months late | 31 Mar 2026 | another £200 |
| 6 months late | 30 Jun 2026 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 2026 | 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
- SC464419
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 November 2013 (12 years ago)
- Registered office
- Free Church Manse, Strathy, Thurso, Caithness, KW14 7RZ
- Nature of business
- Construction of roads and motorways (SIC 42110)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2023
- Last confirmation statement
- 25 November 2024
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 Thurso
Other active civil engineering contractors registered in Thurso.
- Gdes Matosca Limited2025
- Grid Energy Services Ltd2026
- Iain Gunn Ltd2025
- North Coast Excavations Ltd2018
- BL Mackay Limited2007
All civil engineering contractors in Thurso · All trades in Thurso · Civil engineering across the UK
Frequently asked questions
When are Cowan Plant Strathy Limited's accounts due?
Cowan Plant Strathy Limited's accounts were due at Companies House on 30 September 2025 and the register shows them as overdue.
When is Cowan Plant Strathy Limited's CT600 due?
The CT600 for the period to 31 December 2024 is due at HMRC by 31 December 2025, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2025.
Is Cowan Plant Strathy Limited still trading?
Cowan Plant Strathy Limited 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 Cowan Plant Strathy Limited do?
Cowan Plant Strathy Limited is registered under Construction of roads and motorways (SIC 42110).
How old is Cowan Plant Strathy Limited?
Cowan Plant Strathy Limited was incorporated on 25 November 2013, 12 years ago.
What is the penalty if Cowan Plant Strathy 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 Cowan Plant Strathy Limited 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.