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- Gastight Ltd
Company profile · Plumbers and heating engineers
Gastight Ltd
Gastight Ltd is a 5-year-old private limited company registered in Greenock, company number SC685028, one of 12 plumbing and heating companies in Greenock. 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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Financial snapshot, 2025
From the balance sheet at 31 March 2025, as filed at Companies House. Negative net assets mean the company owed more than it owned at that date.
Gastight Ltd over the years
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 £664 (-11.9%) on the year before, to -£6,260.
- Net assets rose in 1 of 3 year-on-year comparisons on record.
- Current assets of £664 against £5,136 owed within a year: 0.1 times cover.
- 1 employee on average during the year.
- 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 Mar 2025 | -£6,260 | £664 | £5,136 | 1 | |
| 31 Mar 2024 | -£5,596 | £523 | £523 | £6,119 | 1 |
| 31 Mar 2023 | -£2,220 | £1,418 | £2,690 | 1 | |
| 31 Mar 2022 | -£3,062 | £1,134 | £1,134 | £4,196 | 1 |
Where Gastight Ltd is registered
The registered office is in Greenock (PA15), in the Inverclyde local authority area, Scotland. Show PA15 2RA on a map.
Other trade companies in PA15
- DJN Autos LtdMechanics and garages
- Di Instrument & Control Engineering Services LtdMachinery repair and installation
- CCS Motors LtdMotor traders
- Going With the Grain Joinery LtdJoiners and carpenters
- RD Piping Solutions LtdInstallers
- SDR Development Group LtdProperty developers
- Ava Flavour LtdCleaning companies
- S. Johnston Joiners & Building Contractors LimitedJoiners and carpenters
What happens if Gastight 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
- SC685028
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 January 2021 (5 years ago)
- Registered office
- 28 Poplar Street, Greenock, PA15 2RA
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 18 May 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 Greenock
Other active plumbing and heating companies registered in Greenock.
- Grierson Plumbing Limited2020
- Mooreheat Ltd2012
- PM Gas Services Limited2026
- Protec Plumbing & Heating (Scotland) Ltd2018
- Samgail HVAC Solutions Ltd2026
- Stevenson FMS Ltd2025
- Allan Plumbing & Heating Ltd2020
- Aquathin (Scotland) Limited2006
All plumbing and heating companies in Greenock · All trades in Greenock · Plumbers and heating engineers across the UK
Frequently asked questions
When are Gastight Ltd's accounts due?
Gastight Ltd's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Gastight 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 Gastight Ltd still trading?
Gastight 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 Gastight Ltd do?
Gastight Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Gastight Ltd?
Gastight Ltd was incorporated on 5 January 2021, 5 years ago.
What is the penalty if Gastight 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 Gastight 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.