- Companies
- Plumbers and heating engineers
- London
- Southeast Ecotec Services Limited
Southeast Ecotec Services Limited
- Company number
- 15044371
- Incorporated
- 2 Aug 20233 years trading
- Registered office
- A403 Hertsmere Road, London, E14 4AZ
- Nature of business
- Plumbing, heat and air-conditioning installation
Southeast Ecotec Services Limited is a 3-year-old private limited company registered in London, company number 15044371, one of 2,972 plumbing and heating companies in London. Companies House shows its accounts as overdue: they were due on 31 May 2026.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Where Southeast Ecotec Services Limited is registered
The registered office is in London (E14), in the Tower Hamlets local authority area, London. Show E14 4AZ on a map.
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What happens if Southeast Ecotec Services Limited files late
If the accounts reach Companies House today, the late filing penalty is £750 (£1,500 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2026 to 30 Jun 2026 | £150 |
| 1 to 3 months late | 1 Jul 2026 to 31 Aug 2026 | £375 |
| 3 to 6 months late | 1 Sep 2026 to 30 Nov 2026 | £750 |
| More than 6 months late | From 1 Dec 2026 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2026 | £200 |
| 3 months late | 30 Nov 2026 | another £200 |
| 6 months late | 28 Feb 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 2027 | 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
- 15044371
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 August 2023 (3 years ago)
- Registered office
- A403 Hertsmere Road, London, E14 4AZ
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2024
- Last confirmation statement
- 1 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.
- Southern Gas Ltd2023
- Southern Plumbing Solutions Ltd2024
- Southside Creations Ltd2025
- Southside Plumbing Ltd2026
- Sovereign Heating and Gas Ltd2025
- Specialised Plumbing Solutions Ltd2019
- Specific Heat (London) Ltd2010
- Speedheat Limited2002
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Southeast Ecotec Services Limited's accounts due?
Southeast Ecotec Services Limited's accounts were due at Companies House on 31 May 2026 and the register shows them as overdue.
When is Southeast Ecotec Services Limited's CT600 due?
The CT600 for the period to 31 August 2025 is due at HMRC by 31 August 2026, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2026.
Is Southeast Ecotec Services Limited still trading?
Southeast Ecotec Services 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 Southeast Ecotec Services Limited do?
Southeast Ecotec Services Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Southeast Ecotec Services Limited?
Southeast Ecotec Services Limited was incorporated on 2 August 2023, 3 years ago.
What is the penalty if Southeast Ecotec Services 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 Southeast Ecotec Services 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.