- Companies
- Civil engineering
- Oban
- Sinclair Plant Limited
Sinclair Plant Limited
- Company number
- SC711987
- Incorporated
- 12 Oct 20215 years trading
- Registered office
- Abernethys, Connel, Oban, PA37 1RN
- Nature of business
- Construction of other civil engineering projects n.e.c.
Sinclair Plant Limited is a 5-year-old private limited company registered in Oban, company number SC711987, one of 17 civil engineering contractors in Oban. Its next accounts are due at Companies House on 29 June 2027, and the CT600 for the period to 29 September 2026 is due at HMRC on 29 September 2027.
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 down £19K (-75.4%) on the year before, to -£44K.
- Net assets rose in 1 of 3 year-on-year comparisons on record.
- Current assets of £58K against £219K owed within a year: 0.3 times cover.
- 4 employees on average, down from 5 the year before.
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | -£44K | £3,690 | £58K | £219K | 4 |
| 30 Sep 2024 | -£25K | £4,544 | £38K | £143K | 5 |
| 30 Sep 2023 | £51K | £6,347 | £139K | £149K | 5 |
| 30 Sep 2022 | £1,416 | £38K | £94K | £151K | 6 |
Where Sinclair Plant Limited is registered
The registered office is in Oban (PA37), in the Argyll and Bute local authority area, Scotland. Show PA37 1RN on a map.
Other trade companies in PA37
- Akerr Roofing and Multi Trade Specialist LtdRoofers
- CG Cleaning Solutions LtdCleaning companies
- Hebridean Maintenance LtdInstallers
- Martin Campbell Roofing LtdRoofers
- D&B Construction Services LtdBuilders
- Ferguson Subsea LtdMachinery repair and installation
- Newtec Heating Solutions LimitedPlumbers and heating engineers
- Creran Homes LtdBuilders
What happens if Sinclair Plant 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 29 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 30 Jun 2027 to 29 Jul 2027 | £150 |
| 1 to 3 months late | 30 Jul 2027 to 29 Sep 2027 | £375 |
| 3 to 6 months late | 30 Sep 2027 to 29 Dec 2027 | £750 |
| More than 6 months late | From 30 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 30 Sep 2027 | £200 |
| 3 months late | 29 Dec 2027 | another £200 |
| 6 months late | 29 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 29 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
- SC711987
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 October 2021 (5 years ago)
- Registered office
- Abernethys, Connel, Oban, PA37 1RN
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 29 September (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 11 October 2025
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 Oban
Other active civil engineering contractors registered in Oban.
- Alchemy Plant & Contracting Ltd2011
- Amax Contractors Limited2002
- D & K Lafferty & Company Limited2003
- Gordon George Construction Services Limited2008
- Hamill Site Management Services Ltd2023
- I Miles Contracting Ltd2015
- J.A.M Drilling Int Ltd2025
- J.A.M Group Holdings Ltd2024
All civil engineering contractors in Oban · All trades in Oban · Civil engineering across the UK
Frequently asked questions
When are Sinclair Plant Limited's accounts due?
Sinclair Plant Limited's next accounts are due at Companies House by 29 June 2027 (in 260 days), covering the period to 29 September 2026.
When is Sinclair Plant Limited's CT600 due?
The CT600 for the period to 29 September 2026 is due at HMRC by 29 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 30 June 2027.
Is Sinclair Plant Limited still trading?
Sinclair Plant Limited 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 Sinclair Plant Limited do?
Sinclair Plant Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Sinclair Plant Limited?
Sinclair Plant Limited was incorporated on 12 October 2021, 5 years ago.
What is the penalty if Sinclair Plant 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 Sinclair Plant Limited 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.