- Companies
- Plumbers and heating engineers
- Swansea
- Duramax Plumbing Limited
Duramax Plumbing Limited
- Company number
- 16586821
- Incorporated
- 16 Jul 20251 year trading
- Registered office
- 17 Cwmdu Road, Pontardawe, Swansea, SA8 4QU
- Nature of business
- Plumbing, heat and air-conditioning installation
Duramax Plumbing Limited is a 1-year-old private limited company registered in Swansea, company number 16586821, one of 148 plumbing and heating companies in Swansea. Its next accounts are due at Companies House on 16 April 2027, and its first CT600 is due at HMRC on 15 July 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Duramax Plumbing Limited is registered
The registered office is in Swansea (SA8), in the Neath Port Talbot local authority area, Wales. Show SA8 4QU on a map.
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What happens if Duramax Plumbing 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 16 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 17 Apr 2027 to 16 May 2027 | £150 |
| 1 to 3 months late | 17 May 2027 to 16 Jul 2027 | £375 |
| 3 to 6 months late | 17 Jul 2027 to 16 Oct 2027 | £750 |
| More than 6 months late | From 17 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 16586821
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 July 2025 (1 year ago)
- Registered office
- 17 Cwmdu Road, Pontardawe, Swansea, SA8 4QU
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 July (accounting reference date)
- Accounts type
- No accounts filed yet
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 Swansea
Other active plumbing and heating companies registered in Swansea.
- DW-Air Limited2018
- Ecore Energy Solutions Ltd2024
- Ecotech Installations Ltd2024
- Eidolon Renovations Ltd2026
- Elite Heating Services (Wales) Limited2002
- Energysave Ltd2020
- Everest Mechanical Services Limited2026
- Flaming Hot Heating Ltd2022
All plumbing and heating companies in Swansea · All trades in Swansea · Plumbers and heating engineers across the UK
Frequently asked questions
When are Duramax Plumbing Limited's accounts due?
Duramax Plumbing Limited's next accounts are due at Companies House by 16 April 2027 (in 185 days), covering the period to 31 July 2026.
When is Duramax Plumbing Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 15 July 2026, due by 15 July 2027, and one for the period to 31 July 2026, due by 31 July 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Duramax Plumbing Limited still trading?
Duramax Plumbing Limited is listed as active on the Companies House register (checked 13 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 Duramax Plumbing Limited do?
Duramax Plumbing Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Duramax Plumbing Limited?
Duramax Plumbing Limited was incorporated on 16 July 2025, 1 year ago.
What is the penalty if Duramax Plumbing 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 Duramax Plumbing Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.