- Companies
- Plumbers and heating engineers
- Lisburn
- Armstrong Plumbing & Heating (NI) Ltd
Armstrong Plumbing & Heating (NI) Ltd
- Company number
- NI625639
- Incorporated
- 10 Jul 201412 years trading
- Registered office
- 113 Saintfield Road, Lisburn, County Antrim, BT27 5PA
- Nature of business
- Plumbing, heat and air-conditioning installation
Armstrong Plumbing & Heating (NI) Ltd is a 12-year-old private limited company registered in Lisburn, company number NI625639, one of 14 plumbing and heating companies in Lisburn. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 £974K (-71.5%) on the year before, to £388K.
- Net assets rose in 2 of 3 year-on-year comparisons on record.
- Current assets of £380K against £56K owed within a year: 6.8 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £388K | £262K | £380K | £56K | 0 |
| 31 Aug 2024 | £1.4M | £1.2M | £1.5M | £262K | 6 |
| 31 Aug 2023 | £1.1M | £962K | £1.5M | £481K | 7 |
| 31 Aug 2022 | £790K | £745K | £911K | £154K | 7 |
Where Armstrong Plumbing & Heating (NI) Ltd is registered
The registered office is in Lisburn (BT27), in the Lisburn and Castlereagh local authority area, Northern Ireland. Show BT27 5PA on a map.
Other trade companies in BT27
- Clean & Gleam Cleaning Services LtdCleaning companies
- MJS Spec and Tech Aero Solutions LtdCleaning companies
- Aquatib LtdSpecialist contractors
- Walsh Residential Group LtdProperty developers
- BM Construction Services (N.I.) LimitedBuilders
- Renoglow Property Services LtdProperty developers
- CMS Parts LimitedMotor traders
- JPW Automotive LtdMechanics and garages
What happens if Armstrong Plumbing & Heating (NI) 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- NI625639
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 July 2014 (12 years ago)
- Registered office
- 113 Saintfield Road, Lisburn, County Antrim, BT27 5PA
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 7 October 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Lisburn
Other active plumbing and heating companies registered in Lisburn.
- Belmont Plumbing Services Ltd2022
- C A Services (NI) Limited2012
- Clearwater Bathrooms Installations Ltd2025
- Colin Boyes Limited2014
- Ef Plumbing & Heating Ltd2020
- Fitzgas Ltd2020
- Flowright Belfast Plumbing Ltd2025
- Impact Plumbing and Heating Ltd2026
All plumbing and heating companies in Lisburn · All trades in Lisburn · Plumbers and heating engineers across the UK
Frequently asked questions
When are Armstrong Plumbing & Heating (NI) Ltd's accounts due?
Armstrong Plumbing & Heating (NI) Ltd's next accounts are due at Companies House by 31 May 2027 (in 230 days), covering the period to 31 August 2026.
When is Armstrong Plumbing & Heating (NI) Ltd's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Armstrong Plumbing & Heating (NI) Ltd still trading?
Armstrong Plumbing & Heating (NI) Ltd 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 Armstrong Plumbing & Heating (NI) Ltd do?
Armstrong Plumbing & Heating (NI) Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Armstrong Plumbing & Heating (NI) Ltd?
Armstrong Plumbing & Heating (NI) Ltd was incorporated on 10 July 2014, 12 years ago.
What is the penalty if Armstrong Plumbing & Heating (NI) 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 Armstrong Plumbing & Heating (NI) Ltd 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.