- Companies
- Plumbers and heating engineers
- Belfast
- GM 18 Gas Ltd
GM 18 Gas Ltd
- Company number
- NI672266
- Incorporated
- 2 Sep 20206 years trading
- Registered office
- 65 Beechill Park East, Belfast, BT8 6NY
- Nature of business
- Plumbing, heat and air-conditioning installation
GM 18 Gas Ltd is a 6-year-old private limited company registered in Belfast, company number NI672266, one of 99 plumbing and heating companies in Belfast. Companies House shows its accounts as overdue: they were due on 30 September 2026.
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 £5,459 (+80.6%) on the year before, to £12K.
- Net assets rose in 1 of 3 year-on-year comparisons on record.
- Current assets of £126K against £115K owed within a year: 1.1 times cover.
- 6 employees on average, down from 9 the year before.
- Balance sheets on record for 4 years, 2021 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2024 | £12K | £13K | £126K | £115K | 6 |
| 30 Sep 2023 | £6,773 | £18K | £103K | £104K | 9 |
| 30 Sep 2022 | £22K | £32K | £86K | £67K | 5 |
| 30 Sep 2021 | £24K | £22K | £58K | £57K | 5 |
Where GM 18 Gas Ltd is registered
The registered office is in Belfast (BT8), in the Lisburn and Castlereagh local authority area, Northern Ireland. Show BT8 6NY on a map.
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What happens if GM 18 Gas Ltd files late
If the accounts reach Companies House today, the late filing penalty is £150 (£300 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 Oct 2026 to 31 Oct 2026 | £150 |
| 1 to 3 months late | 1 Nov 2026 to 31 Dec 2026 | £375 |
| 3 to 6 months late | 1 Jan 2027 to 31 Mar 2027 | £750 |
| More than 6 months late | From 1 Apr 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2027 | £200 |
| 3 months late | 31 Mar 2027 | another £200 |
| 6 months late | 30 Jun 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- NI672266
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 September 2020 (6 years ago)
- Registered office
- 65 Beechill Park East, Belfast, BT8 6NY
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2024
- Last confirmation statement
- 1 September 2026
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 Belfast
Other active plumbing and heating companies registered in Belfast.
- Greenlight Gas Limited2018
- GWH Plumbing Services Ltd2017
- Hanna Mechanical Ltd2025
- Heaney Heating Limited2011
- Heaney Heating Plumbing Limited2015
- Heating Solutions (2018) Ltd2018
- Ian Reid Heating Services Ltd2019
- Indevair Ltd2016
All plumbing and heating companies in Belfast · All trades in Belfast · Plumbers and heating engineers across the UK
Frequently asked questions
When are GM 18 Gas Ltd's accounts due?
GM 18 Gas Ltd's accounts were due at Companies House on 30 September 2026 and the register shows them as overdue.
When is GM 18 Gas Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 30 September 2025, due by 30 September 2026, and one for the period to 31 December 2025, due by 31 December 2026. Corporation tax is payable 9 months and 1 day after the end of each.
Is GM 18 Gas Ltd still trading?
GM 18 Gas 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 GM 18 Gas Ltd do?
GM 18 Gas Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is GM 18 Gas Ltd?
GM 18 Gas Ltd was incorporated on 2 September 2020, 6 years ago.
What is the penalty if GM 18 Gas 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 GM 18 Gas 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.