- Company number
- NI009213
- Incorporated
- 9 Jan 197353 years trading
- Registered office
- 89 Bush Road, Dungannon, County Tyrone, BT71 6EZ
- Nature of business
- Construction of domestic buildings
Mainline Holdings (NI) Limited is a 53-year-old private limited company registered in Dungannon, company number NI009213, one of 89 building contractors in Dungannon. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 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 £4,059 (-0.3%) on the year before, to £1.4M.
- Net assets rose in 4 of 7 year-on-year comparisons on record.
- Current assets of £2.4M against £1M owed within a year: 2.3 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 9 years, 2015 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2025 | £1.4M | £171K | £2.4M | £1M | 0 |
| 29 Feb 2024 | £1.4M | £245K | £2.4M | £1M | 0 |
| 28 Feb 2023 | £1.4M | £57K | £2.4M | £1M | 0 |
| 28 Feb 2022 | £1.4M | £1.1M | £2.5M | £1.1M | 0 |
| 28 Feb 2021 | £1.4M | £241K | £2.5M | £1.2M | 0 |
| 29 Feb 2020 | £1.2M | £26K | £2.4M | £1.2M | 0 |
| 28 Feb 2019 | £1.1M | £2,200 | £2.4M | £1.3M | |
| 28 Feb 2016 | £1.1M | £21K | £1.3M | £225K | |
| 28 Feb 2015 | £1.1M | £42K | £1.2M | £222K |
Where Mainline Holdings (NI) Limited is registered
The registered office is in Dungannon (BT71), in the Mid Ulster local authority area, Northern Ireland. Show BT71 6EZ on a map.
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Also registered at this address
1 other company uses the same registered office as Mainline Holdings (NI) Limited.
- Gallion Developments LimitedBuilders
What happens if Mainline Holdings (NI) 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 30 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- NI009213
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 January 1973 (53 years ago)
- Registered office
- 89 Bush Road, Dungannon, County Tyrone, BT71 6EZ
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 28 February (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 31 January 2026
- Charges (mortgages)
- 0 outstanding of 18 registered
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Dungannon
Other active building contractors registered in Dungannon.
- Marden Property Developments Limited2003
- McDonald Construction Limited2004
- MCG Brickwork (Irl) Ltd2026
- Moy Contracts Limited2017
- Multitek Construction Ltd2020
- Murnell Construction Ltd2006
- Murphy Construction & Surveying Services Ltd2022
- Nevache Limited2013
All building contractors in Dungannon · All trades in Dungannon · Builders across the UK
Frequently asked questions
When are Mainline Holdings (NI) Limited's accounts due?
Mainline Holdings (NI) Limited's next accounts are due at Companies House by 30 November 2026 (in 48 days), covering the period to 28 February 2026.
When is Mainline Holdings (NI) Limited's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is Mainline Holdings (NI) Limited still trading?
Mainline Holdings (NI) 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 Mainline Holdings (NI) Limited do?
Mainline Holdings (NI) Limited is registered under Construction of domestic buildings (SIC 41202).
How old is Mainline Holdings (NI) Limited?
Mainline Holdings (NI) Limited was incorporated on 9 January 1973, 53 years ago.
What is the penalty if Mainline Holdings (NI) 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 Mainline Holdings (NI) 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.