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- Southall
- Gas Mark 9 Limited
Company profile · Plumbers and heating engineers
Gas Mark 9 Limited
Gas Mark 9 Limited is a 12-year-old private limited company registered in Southall, company number 08899992, one of 60 plumbing and heating companies in Southall. Its next accounts are due at Companies House on 27 November 2026, and the CT600 for the period to 27 February 2026 is due at HMRC on 27 February 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 27 February 2025, as filed at Companies House.
Gas Mark 9 Limited 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 up £1,067 (+395.2%) on the year before, to £797.
- Net assets rose in 2 of 9 year-on-year comparisons on record.
- Current assets of £6,418 against £11K owed within a year: 0.6 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 10 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 27 Feb 2025 | £797 | £6,418 | £11K | 1 | |
| 29 Feb 2024 | -£270 | £1,027 | £5,962 | £7,055 | 1 |
| 28 Feb 2023 | £269 | £1,259 | £9,889 | £8,920 | 1 |
| 27 Feb 2023 | £269 | £9,889 | £8,328 | 1 | |
| 28 Feb 2022 | £2,250 | £6,813 | £17K | £7,738 | 1 |
| 28 Feb 2021 | -£433 | £13K | £14K | £6,915 | 1 |
| 29 Feb 2020 | £32 | £3,090 | £6,165 | £12K | 1 |
| 28 Feb 2019 | £275 | £5,249 | £5,249 | £4,974 | |
| 28 Feb 2018 | £5,961 | £10K | £4,319 | ||
| 28 Feb 2017 | £7,363 | £19K | £19K | £12K |
Where Gas Mark 9 Limited is registered
The registered office is in Southall (UB1), in the Ealing local authority area, London. Show UB1 3QD on a map.
Other trade companies in UB1
- Kingsbury Roofing & Construction LtdRoofers
- T2Y LtdBuilders
- Driveworx LimitedMotor traders
- Raunak Design and Build LtdBuilders
- Phlo Plumbing & Heating LtdPlumbers and heating engineers
- Airpro Conditioning LimitedPlumbers and heating engineers
- Springfields Property LimitedProperty developers
- Sanndhu Construction UK LtdBuilders
What happens if Gas Mark 9 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 27 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 28 Nov 2026 to 27 Dec 2026 | £150 |
| 1 to 3 months late | 28 Dec 2026 to 27 Feb 2027 | £375 |
| 3 to 6 months late | 28 Feb 2027 to 27 May 2027 | £750 |
| More than 6 months late | From 28 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 28 Feb 2027 | £200 |
| 3 months late | 27 May 2027 | another £200 |
| 6 months late | 27 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 27 Feb 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
- 08899992
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 February 2014 (12 years ago)
- Registered office
- 68 Oakwood Avenue, Southall, London, UB1 3QD
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 27 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 27 February 2025
- Last confirmation statement
- 18 February 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 Southall
Other active plumbing and heating companies registered in Southall.
- Gas Safety Inspectors Ltd2026
- Go-Green Energy Services Ltd2024
- H.S. Heating & Plumbing Ltd2020
- Heatfix Limited2003
- Heating and Plumbing Services 24/7 Ltd2025
- HK Service Ltd2014
- Hpedy Limited2026
- Ironoaks Developments Ltd2026
All plumbing and heating companies in Southall · All trades in Southall · Plumbers and heating engineers across the UK
Frequently asked questions
When are Gas Mark 9 Limited's accounts due?
Gas Mark 9 Limited's next accounts are due at Companies House by 27 November 2026 (in 46 days), covering the period to 27 February 2026.
When is Gas Mark 9 Limited's CT600 due?
The CT600 for the period to 27 February 2026 is due at HMRC by 27 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 28 November 2026.
Is Gas Mark 9 Limited still trading?
Gas Mark 9 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 Gas Mark 9 Limited do?
Gas Mark 9 Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Gas Mark 9 Limited?
Gas Mark 9 Limited was incorporated on 18 February 2014, 12 years ago.
What is the penalty if Gas Mark 9 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 Gas Mark 9 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.