- Companies
- Plumbers and heating engineers
- Isleworth
- GSJ Plumbing & Heating Ltd
GSJ Plumbing & Heating Ltd
- Company number
- 15510771
- Incorporated
- 21 Feb 20242 years trading
- Registered office
- 214 Hall Road, Isleworth, TW7 7PG
- Nature of business
- Plumbing, heat and air-conditioning installation
GSJ Plumbing & Heating Ltd is a 2-year-old private limited company registered in Isleworth, company number 15510771, one of 29 plumbing and heating companies in Isleworth. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 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 28 February 2025, as filed at Companies House.
Where GSJ Plumbing & Heating Ltd is registered
The registered office is in Isleworth (TW7), in the Hounslow local authority area, London. Show TW7 7PG on a map.
Other trade companies in TW7
- Pracom LtdMachinery repair and installation
- V&R Construction Group LtdBuilders
- Gio Construction LimitedBuilders
- S & H Bodywork LtdMechanics and garages
- KS Garage Isleworth LtdMotor traders
- C Wiseman Services LtdCleaning companies
- Avenida Developments LtdProperty developers
- Courtesy Cars Group UK LtdMotor traders
What happens if GSJ Plumbing & Heating 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 30 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 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
- 15510771
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 February 2024 (2 years ago)
- Registered office
- 214 Hall Road, Isleworth, TW7 7PG
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 29 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 20 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 Isleworth
Other active plumbing and heating companies registered in Isleworth.
- I Love Plumbing Limited2011
- Int Clima Ltd2024
- James Plumbing and Heating Limited2024
- Kannon Gas Ltd2021
- M K Plumbing & Heating Engineers Limited2010
- MDV Heating & Plumbing Ltd2018
- My Home Supply Limited2025
- P S Plumbing Limited2015
All plumbing and heating companies in Isleworth · All trades in Isleworth · Plumbers and heating engineers across the UK
Frequently asked questions
When are GSJ Plumbing & Heating Ltd's accounts due?
GSJ Plumbing & Heating Ltd's next accounts are due at Companies House by 30 November 2026 (in 48 days), covering the period to 28 February 2026.
When is GSJ Plumbing & Heating Ltd's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is GSJ Plumbing & Heating Ltd still trading?
GSJ Plumbing & Heating 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 GSJ Plumbing & Heating Ltd do?
GSJ Plumbing & Heating Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is GSJ Plumbing & Heating Ltd?
GSJ Plumbing & Heating Ltd was incorporated on 21 February 2024, 2 years ago.
What is the penalty if GSJ Plumbing & Heating 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 GSJ Plumbing & Heating 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.