- Companies
- Plumbers and heating engineers
- Swindon
- 1ST Commercial Gas & Mechanical Ltd
1ST Commercial Gas & Mechanical Ltd
- Company number
- 12300428
- Incorporated
- 6 Nov 20196 years trading
- Registered office
- Unit 8 Clearwater Business Park Frankland Road, Blagrove, Swindon, SN5 8YZ
- Nature of business
- Plumbing, heat and air-conditioning installation; Other specialised construction activities n.e.c.
1ST Commercial Gas & Mechanical Ltd is a 6-year-old private limited company registered in Swindon, company number 12300428, one of 164 plumbing and heating companies in Swindon. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 £30K (-10.8%) on the year before, to £243K.
- Net assets rose in 3 of 5 year-on-year comparisons on record.
- Current assets of £291K against £133K owed within a year: 2.2 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £243K | £291K | £133K | 3 | |
| 30 Nov 2024 | £273K | £285K | £102K | 3 | |
| 30 Nov 2023 | £290K | £101K | £310K | £138K | 4 |
| 30 Nov 2022 | £172K | £143K | £230K | £96K | 4 |
| 30 Nov 2021 | £103K | £154K | £61K | 2 | |
| 30 Nov 2020 | £46K | £99K | £41K | 3 |
Where 1ST Commercial Gas & Mechanical Ltd is registered
The registered office is in Swindon (SN5), in the Swindon local authority area, South West. Show SN5 8YZ on a map.
Other trade companies in SN5
- Pye Landworks LtdLandscapers and gardeners
- Valley View Construction LtdBuilders
- Rideout Electrical LtdElectricians
- Xyq LtdBuilders
- Patch & Polish by the Sadlers LtdInstallers
- BXM Automotive Assets LimitedMotor traders
- D L Heating and Cooling LtdPlumbers and heating engineers
- Andy Gardening Services LtdLandscapers and gardeners
What happens if 1ST Commercial Gas & Mechanical 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 12300428
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 November 2019 (6 years ago)
- Registered office
- Unit 8 Clearwater Business Park Frankland Road, Blagrove, Swindon, SN5 8YZ
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
Other specialised construction activities n.e.c. (SIC 43999) - Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 14 April 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 Swindon
Other active plumbing and heating companies registered in Swindon.
- 4C'S Solutions Limited2022
- Aa Plumbing Gas Electrical Ltd2017
- Ab Leadwork Limited2016
- Ab&M Plumbing & Building Services Ltd2013
- Abbeymead Plumbing and Heating Ltd2025
- Ahs Swindon Limited2002
- All You Can Heat Gas Services Ltd2019
- Alpine Bathroom and Kitchen Services Limited2009
All plumbing and heating companies in Swindon · All trades in Swindon · Plumbers and heating engineers across the UK
Frequently asked questions
When are 1ST Commercial Gas & Mechanical Ltd's accounts due?
1ST Commercial Gas & Mechanical Ltd's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is 1ST Commercial Gas & Mechanical Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is 1ST Commercial Gas & Mechanical Ltd still trading?
1ST Commercial Gas & Mechanical 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 1ST Commercial Gas & Mechanical Ltd do?
1ST Commercial Gas & Mechanical Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220); Other specialised construction activities n.e.c. (SIC 43999).
How old is 1ST Commercial Gas & Mechanical Ltd?
1ST Commercial Gas & Mechanical Ltd was incorporated on 6 November 2019, 6 years ago.
What is the penalty if 1ST Commercial Gas & Mechanical 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 1ST Commercial Gas & Mechanical 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.