- Companies
- Civil engineering
- Oban
- Seator Groundworks Limited
Seator Groundworks Limited
- Company number
- SC850447
- Incorporated
- 30 May 20251 year trading
- Registered office
- 120 George Street, Oban, PA34 5NT
- Nature of business
- Construction of other civil engineering projects n.e.c.
Seator Groundworks Limited is a 1-year-old private limited company registered in Oban, company number SC850447, one of 17 civil engineering contractors in Oban. Its next accounts are due at Companies House on 28 February 2027, and its first CT600 is due at HMRC on 29 May 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 Seator Groundworks Limited is registered
The registered office is in Oban (PA34), in the Argyll and Bute local authority area, Scotland. Show PA34 5NT on a map.
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Also registered at this address
3 other companies use the same registered office as Seator Groundworks Limited.
- Bruadarach Argyll LtdProperty developers
- Corktech Solutions LtdInstallers
- P Gillespie & Son Stonework LimitedSpecialist contractors
What happens if Seator Groundworks 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- SC850447
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 May 2025 (1 year ago)
- Registered office
- 120 George Street, Oban, PA34 5NT
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 29 May 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 Oban
Other active civil engineering contractors registered in Oban.
- Seawork (Scotland) Limited1988
- Sinclair Plant Limited2021
- 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
All civil engineering contractors in Oban · All trades in Oban · Civil engineering across the UK
Frequently asked questions
When are Seator Groundworks Limited's accounts due?
Seator Groundworks Limited's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is Seator Groundworks Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 29 May 2026, due by 29 May 2027, and one for the period to 31 May 2026, due by 31 May 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Seator Groundworks Limited still trading?
Seator Groundworks 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 Seator Groundworks Limited do?
Seator Groundworks Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Seator Groundworks Limited?
Seator Groundworks Limited was incorporated on 30 May 2025, 1 year ago.
What is the penalty if Seator Groundworks 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 Seator Groundworks 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.