- Companies
- Plumbers and heating engineers
- Zircon Air Conditioning (NI) Limited
Zircon Air Conditioning (NI) Limited
- Company number
- NI660042
- Incorporated
- 26 Mar 20197 years trading
- Registered office
- 3 - 6 Xtra Space Office 5, 3 - 6 Alexander Road, Castlereagh, Belfast, BT6 9HP
- Nature of business
- Plumbing, heat and air-conditioning installation
Zircon Air Conditioning (NI) Limited is a 7-year-old private limited company registered in Castlereagh, company number NI660042, one of the UK's plumbing and heating companies. Its next accounts are due at Companies House on 31 October 2027, and the CT600 for the period to 31 January 2027 is due at HMRC on 31 January 2028.
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 £145K (-156%) on the year before, to -£52K.
- Net assets rose in 3 of 6 year-on-year comparisons on record.
- Current assets of £107K against £160K owed within a year: 0.7 times cover.
- 7 employees on average, down from 8 the year before.
- Balance sheets on record for 7 years, 2020 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2026 | -£52K | £42K | £107K | £160K | 7 |
| 31 Jan 2025 | £93K | £4,979 | £168K | £76K | 8 |
| 31 Jan 2024 | £77K | £39K | £100K | £24K | 0 |
| 31 Jan 2023 | £68K | £22K | £187K | £140K | 0 |
| 31 Jan 2022 | £117K | £25K | £202K | £114K | 2 |
| 28 Feb 2021 | £135K | £168K | £477K | £368K | 2 |
| 29 Feb 2020 | £8,931 | £26K | £121K | £114K | 1 |
Where Zircon Air Conditioning (NI) Limited is registered
The registered office is in Castlereagh (BT6), in the Belfast local authority area, Northern Ireland. Show BT6 9HP on a map.
Other trade companies in BT6
- Aviation Tech LtdMachinery repair and installation
- P & P Property Solutions LtdFacilities management
- A and R Kitchens LtdInstallers
- ST. Patrick Auto Wash LtdMechanics and garages
- KJM Cleaning Services LtdCleaning companies
- Auto Apex Servicing and Repairs LtdMechanics and garages
- JD Constructions & Patios LtdLandscapers and gardeners
- Belfast Commercial Cleaning LtdCleaning companies
What happens if Zircon Air Conditioning (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 31 October 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2027 to 30 Nov 2027 | £150 |
| 1 to 3 months late | 1 Dec 2027 to 31 Jan 2028 | £375 |
| 3 to 6 months late | 1 Feb 2028 to 30 Apr 2028 | £750 |
| More than 6 months late | From 1 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2028 | £200 |
| 3 months late | 30 Apr 2028 | another £200 |
| 6 months late | 31 Jul 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 2029 | 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
- NI660042
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 March 2019 (7 years ago)
- Registered office
- 3 - 6 Xtra Space Office 5, 3 - 6 Alexander Road, Castlereagh, Belfast, BT6 9HP
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2026
- Last confirmation statement
- 14 March 2026
- Previous names
- Zircon Air Conditioning Limited (until 25 Feb 2020)
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
Other active plumbing and heating companies.
Frequently asked questions
When are Zircon Air Conditioning (NI) Limited's accounts due?
Zircon Air Conditioning (NI) Limited's next accounts are due at Companies House by 31 October 2027 (in 382 days), covering the period to 31 January 2027.
When is Zircon Air Conditioning (NI) Limited's CT600 due?
The CT600 for the period to 31 January 2027 is due at HMRC by 31 January 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2027.
Is Zircon Air Conditioning (NI) Limited still trading?
Zircon Air Conditioning (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 Zircon Air Conditioning (NI) Limited do?
Zircon Air Conditioning (NI) Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Zircon Air Conditioning (NI) Limited?
Zircon Air Conditioning (NI) Limited was incorporated on 26 March 2019, 7 years ago.
What is the penalty if Zircon Air Conditioning (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 Zircon Air Conditioning (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.