- Companies
- Plumbers and heating engineers
- London
- Diamond Gas Ltd
Diamond Gas Ltd
- Company number
- 14310478
- Incorporated
- 22 Aug 20224 years trading
- Registered office
- Flat 33 Apsley House, Stepney Way, London, E1 3DS
- Nature of business
- Plumbing, heat and air-conditioning installation
Diamond Gas Ltd is a 4-year-old private limited company registered in London, company number 14310478, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 31 May 2028, and the CT600 for the period to 31 August 2027 is due at HMRC on 31 August 2028.
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 £2,621 (+93.3%) on the year before, to £5,430.
- Net assets rose in 2 of 3 year-on-year comparisons on record.
- Current assets of £36K against £32K owed within a year: 1.1 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 4 years, 2023 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2026 | £5,430 | £36K | £32K | 1 | |
| 31 Aug 2025 | £2,809 | £3,619 | £2,593 | 1 | |
| 31 Aug 2024 | £1,752 | £27K | £26K | 1 | |
| 31 Aug 2023 | £1,891 | £10K | £8,332 | 0 |
Where Diamond Gas Ltd is registered
The registered office is in London (E1), in the Tower Hamlets local authority area, London. Show E1 3DS on a map.
Other trade companies in E1
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- Ribh LtdElectricians
- Tyres on Call LtdMechanics and garages
- Hrautosources LtdMotor traders
- Choiceworks LimitedInstallers
- E.M Construction London LtdBuilders
- Qubic Maintenance LtdSpecialist contractors
- Moovin Transport LtdMechanics and garages
What happens if Diamond Gas 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 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2028 to 30 Jun 2028 | £150 |
| 1 to 3 months late | 1 Jul 2028 to 31 Aug 2028 | £375 |
| 3 to 6 months late | 1 Sep 2028 to 30 Nov 2028 | £750 |
| More than 6 months late | From 1 Dec 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 2029 | 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
- 14310478
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 August 2022 (4 years ago)
- Registered office
- Flat 33 Apsley House, Stepney Way, London, E1 3DS
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 August 2026
- Last confirmation statement
- 21 August 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 London
Other active plumbing and heating companies registered in London.
- Diamond Plumb Limited2004
- Diamond Plumbers Limited2020
- Diaz Plumbing Ltd2025
- Dibfix Ltd2025
- Dida Plumbing Ltd2026
- Dilano's Construction Ltd2026
- Direct Gas Utilities Ltd2023
- Direct Leak Detection Ltd2026
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Diamond Gas Ltd's accounts due?
Diamond Gas Ltd's next accounts are due at Companies House by 31 May 2028 (in 596 days), covering the period to 31 August 2027.
When is Diamond Gas Ltd's CT600 due?
The CT600 for the period to 31 August 2027 is due at HMRC by 31 August 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2028.
Is Diamond Gas Ltd still trading?
Diamond Gas 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 Diamond Gas Ltd do?
Diamond Gas Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Diamond Gas Ltd?
Diamond Gas Ltd was incorporated on 22 August 2022, 4 years ago.
What is the penalty if Diamond 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 Diamond Gas 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.