- Companies
- Specialist contractors
- Ballymena
- Mainline Contracts Ltd
Mainline Contracts Ltd
- Company number
- NI072171
- Incorporated
- 27 Mar 200917 years trading
- Registered office
- 313 Townhill Road, Rasharkin, Ballymena, BT44 8RW
- Nature of business
- Other specialised construction activities n.e.c.
Mainline Contracts Ltd is a 17-year-old private limited company registered in Ballymena, company number NI072171, one of 27 specialist construction companies in Ballymena. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 up £9,470 (+0.4%) on the year before, to £2.7M.
- Net assets rose in 5 of 8 year-on-year comparisons on record.
- Current assets of £3M against £373K owed within a year: 8.0 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2015 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £2.7M | £690K | £3M | £373K | 2 |
| 31 Mar 2024 | £2.7M | £539K | £2.7M | £90K | 2 |
| 31 Mar 2023 | £2.7M | £1.6M | £3.8M | £1.1M | 2 |
| 31 Mar 2022 | £841K | £523K | £1.3M | £491K | 2 |
| 31 Mar 2021 | £269K | £246K | £561K | £316K | 2 |
| 31 Mar 2020 | £936K | £471K | £1.2M | £350K | 2 |
| 31 Mar 2019 | £820K | £657K | £1.2M | £386K | 2 |
| 31 Mar 2018 | £330K | £240K | £1.1M | £741K | 2 |
| 31 Mar 2016 | £78K | £19K | £272K | ||
| 31 Mar 2015 | £106K | £186K | £198K |
Where Mainline Contracts Ltd is registered
The registered office is in Ballymena (BT44), in the Causeway Coast and Glens local authority area, Northern Ireland. Show BT44 8RW on a map.
Other trade companies in BT44
- Ono Joinery LtdJoiners and carpenters
- Renarsjk LtdCleaning companies
- O'Kane Industrial Systems LtdMachinery repair and installation
- Commercial Agri Structures LtdBuilders
- MCG Propco Whitehead LimitedProperty developers
- Amg Rib Repair Ireland LimitedMachinery repair and installation
- Suredry-NI LimitedPlumbers and heating engineers
- CSP and Maintenance LtdFinishing trades
Also registered at this address
2 other companies use the same registered office as Mainline Contracts Ltd.
- Ballygolan LtdProperty developers
- Shell Hill LtdSpecialist contractors
What happens if Mainline Contracts 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- NI072171
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 27 March 2009 (17 years ago)
- Registered office
- 313 Townhill Road, Rasharkin, Ballymena, BT44 8RW
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 27 March 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Ballymena
Other active specialist construction companies registered in Ballymena.
- Marb Construction Projects Ltd2023
- McCollam Stone Ltd2008
- Mountview Partitions Limited2004
- Orraview Construction Ltd2016
- Shell Hill Ltd2023
- Stephen Gibson Paving Limited2016
- Structural Fire Solutions Limited2018
- T & D Brick Specials Ltd2016
All specialist construction companies in Ballymena · All trades in Ballymena · Specialist contractors across the UK
Frequently asked questions
When are Mainline Contracts Ltd's accounts due?
Mainline Contracts Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Mainline Contracts Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Mainline Contracts Ltd still trading?
Mainline Contracts 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 Mainline Contracts Ltd do?
Mainline Contracts Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Mainline Contracts Ltd?
Mainline Contracts Ltd was incorporated on 27 March 2009, 17 years ago.
What is the penalty if Mainline Contracts 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 Mainline Contracts 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.