- Companies
- Civil engineering
- Dungannon
- Sean Toner Mechanical Ltd
Sean Toner Mechanical Ltd
- Company number
- NI725716
- Incorporated
- 23 Jan 20251 year trading
- Registered office
- 90A Bardahessiagh Road, Pomeroy, Dungannon, BT70 2RJ
- Nature of business
- Construction of utility projects for fluids; Construction of water projects; Other construction installation
Sean Toner Mechanical Ltd is a 1-year-old private limited company registered in Dungannon, company number NI725716, one of 52 civil engineering contractors in Dungannon. Its next accounts are due at Companies House on 23 October 2026, and its first CT600 is due at HMRC on 22 January 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 Sean Toner Mechanical Ltd is registered
The registered office is in Dungannon (BT70), in the Mid Ulster local authority area, Northern Ireland. Show BT70 2RJ on a map.
Other trade companies in BT70
- MCG Brickwork (Irl) LtdBuilders
- Creteworx (N.I.) LtdCivil engineering
- Ralph Burrows & Sons LtdSpecialist contractors
- Tyrone Bricklayers LtdBuilders
- D Blake Electrical LtdElectricians
- Harform LtdCivil engineering
- McNally Groundworks LtdGroundworks and demolition
- Top Landscapes & Gardening LimitedLandscapers and gardeners
What happens if Sean Toner Mechanical 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 23 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 24 Oct 2026 to 23 Nov 2026 | £150 |
| 1 to 3 months late | 24 Nov 2026 to 23 Jan 2027 | £375 |
| 3 to 6 months late | 24 Jan 2027 to 23 Apr 2027 | £750 |
| More than 6 months late | From 24 Apr 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- NI725716
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 January 2025 (1 year ago)
- Registered office
- 90A Bardahessiagh Road, Pomeroy, Dungannon, BT70 2RJ
- Nature of business
- Construction of utility projects for fluids (SIC 42210)
Construction of water projects (SIC 42910)
Other construction installation (SIC 43290) - Year end
- 31 January (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 22 January 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 Dungannon
Other active civil engineering contractors registered in Dungannon.
- TQ Comms Ltd2022
- Universal Process Engineering Limited2013
- Wylie Civil Engineering Ltd2021
- Ap MC Crory Engineering Limited2006
- Bcsni Ltd2022
- BN Utility Services Limited2021
- Camcon Plant Limited2018
- CBS (NI) Ltd2012
All civil engineering contractors in Dungannon · All trades in Dungannon · Civil engineering across the UK
Frequently asked questions
When are Sean Toner Mechanical Ltd's accounts due?
Sean Toner Mechanical Ltd's next accounts are due at Companies House by 23 October 2026 (in 10 days), covering the period to 31 January 2026.
When is Sean Toner Mechanical 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 22 January 2026, due by 22 January 2027, and one for the period to 31 January 2026, due by 31 January 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Sean Toner Mechanical Ltd still trading?
Sean Toner Mechanical 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 Sean Toner Mechanical Ltd do?
Sean Toner Mechanical Ltd is registered under Construction of utility projects for fluids (SIC 42210); Construction of water projects (SIC 42910); Other construction installation (SIC 43290).
How old is Sean Toner Mechanical Ltd?
Sean Toner Mechanical Ltd was incorporated on 23 January 2025, 1 year ago.
What is the penalty if Sean Toner Mechanical 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 Sean Toner Mechanical 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.