South West Antrim Construction Limited
- Company number
- NI010047
- Incorporated
- 11 Mar 197452 years trading
- Registered office
- 30 Orken Lane, Aghalee, Armagh, BT67 0ED
- Nature of business
- Construction of commercial buildings
South West Antrim Construction Limited is a 52-year-old private limited company registered in Aghalee, company number NI010047, one of the UK's building contractors. Companies House shows its accounts as overdue: they were due on 31 December 2025.
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 £91K (-99.8%) on the year before, to -£182K.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £60K against £284K owed within a year: 0.2 times cover.
- 7 employees on average, up from 5 the year before.
- Balance sheets on record for 10 years, 2015 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2024 | -£182K | £0 | £60K | £284K | 7 |
| 31 Mar 2023 | -£91K | £283 | £446K | £564K | 5 |
| 31 Mar 2022 | -£21K | £316 | £558K | £619K | 7 |
| 31 Mar 2021 | £20K | £598K | £566K | 9 | |
| 31 Mar 2020 | -£22K | £518K | £595K | 10 | |
| 31 Mar 2019 | £77K | £516K | £547K | 10 | |
| 31 Mar 2018 | £70K | £521K | £500K | 10 | |
| 31 Mar 2017 | £74K | £383K | £391K | ||
| 31 Mar 2016 | £78K | £406K | £412K | ||
| 31 Mar 2015 | £51K | £525K | £563K |
Where South West Antrim Construction Limited is registered
The registered office is in Aghalee (BT67), in the Armagh City, Banbridge and Craigavon local authority area, Northern Ireland. Show BT67 0ED on a map.
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- L17 Construction Management LtdSpecialist contractors
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What happens if South West Antrim Construction Limited files late
If the accounts reach Companies House today, the late filing penalty is £1,500 (£3,000 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2026 to 31 Jan 2026 | £150 |
| 1 to 3 months late | 1 Feb 2026 to 31 Mar 2026 | £375 |
| 3 to 6 months late | 1 Apr 2026 to 30 Jun 2026 | £750 |
| More than 6 months late | From 1 Jul 2026 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2026 | £200 |
| 3 months late | 30 Jun 2026 | another £200 |
| 6 months late | 30 Sep 2026 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2027 | 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
- NI010047
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 March 1974 (52 years ago)
- Registered office
- 30 Orken Lane, Aghalee, Armagh, BT67 0ED
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2024
- Last confirmation statement
- 14 January 2025
- Charges (mortgages)
- 3 outstanding of 3 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
Other active building contractors.
Frequently asked questions
When are South West Antrim Construction Limited's accounts due?
South West Antrim Construction Limited's accounts were due at Companies House on 31 December 2025 and the register shows them as overdue.
When is South West Antrim Construction Limited's CT600 due?
The CT600 for the period to 31 March 2025 is due at HMRC by 31 March 2026, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2026.
Is South West Antrim Construction Limited still trading?
South West Antrim Construction Limited is listed as active on the Companies House register (checked 13 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 South West Antrim Construction Limited do?
South West Antrim Construction Limited is registered under Construction of commercial buildings (SIC 41201).
How old is South West Antrim Construction Limited?
South West Antrim Construction Limited was incorporated on 11 March 1974, 52 years ago.
What is the penalty if South West Antrim Construction 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 South West Antrim Construction Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.