- Companies
- Plumbers and heating engineers
- Washington
- Iso Plumb Plumbing and Heating Limited
Iso Plumb Plumbing and Heating Limited
- Company number
- 15195067
- Incorporated
- 7 Oct 20233 years trading
- Registered office
- 12 Donkin Road, Washington, Tyne And Wear, NE37 1PF
- Nature of business
- Plumbing, heat and air-conditioning installation
Iso Plumb Plumbing and Heating Limited is a 3-year-old private limited company registered in Washington, company number 15195067, one of 20 plumbing and heating companies in Washington. Its next accounts are due at Companies House on 31 October 2026, and its first CT600 is due at HMRC on 31 October 2026.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Where Iso Plumb Plumbing and Heating Limited is registered
The registered office is in Washington (NE37), in the Sunderland local authority area, North East. Show NE37 1PF on a map.
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What happens if Iso Plumb Plumbing and Heating 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 31 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 15195067
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 October 2023 (3 years ago)
- Registered office
- 12 Donkin Road, Washington, Tyne And Wear, NE37 1PF
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 October 2024
- Last confirmation statement
- 12 September 2025
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 Washington
Other active plumbing and heating companies registered in Washington.
- MTL Gas Services Ltd2017
- Northeast Air Conditioning Services Ltd2026
- Northern Breeze HVAC Ltd2021
- Norvex Ne Ltd2026
- PR Heating Services Ltd2026
- Right Heat UK Limited2014
- Taylor’S Heating Services Ltd2022
- UK Gas Services Ne Ltd2018
All plumbing and heating companies in Washington · All trades in Washington · Plumbers and heating engineers across the UK
Frequently asked questions
When are Iso Plumb Plumbing and Heating Limited's accounts due?
Iso Plumb Plumbing and Heating Limited's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Iso Plumb Plumbing and Heating 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 31 October 2025, due by 31 October 2026, and one for the period to 31 January 2026, due by 31 January 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Iso Plumb Plumbing and Heating Limited still trading?
Iso Plumb Plumbing and Heating 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 Iso Plumb Plumbing and Heating Limited do?
Iso Plumb Plumbing and Heating Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Iso Plumb Plumbing and Heating Limited?
Iso Plumb Plumbing and Heating Limited was incorporated on 7 October 2023, 3 years ago.
What is the penalty if Iso Plumb Plumbing and Heating 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 Iso Plumb Plumbing and Heating 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.