- Companies
- Specialist contractors
- Cardiff
- Koretrix Engineering Ltd
Koretrix Engineering Ltd
- Company number
- 07865687
- Incorporated
- 30 Nov 201114 years trading
- Registered office
- PO Box 4385, 07865687 - Companies House Default Address, Cardiff, CF14 8LH
- Nature of business
- Other specialised construction activities n.e.c.
Koretrix Engineering Ltd is a 14-year-old private limited company registered in Cardiff, company number 07865687, one of 173 specialist construction companies in Cardiff. Companies House shows its accounts as overdue: they were due on 31 August 2026.
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 down £26K (-75%) on the year before, to £8,617.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £24K against £31K owed within a year: 0.8 times cover.
- 4 employees on average during the year.
- Balance sheets on record for 10 years, 2015 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2024 | £8,617 | £15K | £24K | £31K | 4 |
| 30 Nov 2023 | £35K | £30K | £45K | £27K | 4 |
| 30 Nov 2022 | £9,141 | £26K | £46K | £32K | 4 |
| 30 Nov 2021 | £12K | £16K | £42K | £36K | 2 |
| 30 Nov 2020 | £15K | £14K | £45K | £41K | 2 |
| 30 Nov 2019 | £29K | £31K | £32K | 3 | |
| 30 Nov 2018 | £38K | £38K | £21K | 2 | |
| 30 Nov 2017 | £35K | £25K | £10K | ||
| 30 Nov 2016 | £673 | £9,620 | £15K | £31K | |
| 30 Nov 2015 | £1,427 | £8,814 | £16K | £33K |
Where Koretrix Engineering Ltd is registered
The registered office is in Cardiff (CF14), in the Caerphilly local authority area, Wales. Show CF14 8LH on a map.
Other trade companies in CF14
- Velren Group LtdProperty developers
- Premierroofcare LtdRoofers
- JLG Groundworks LtdCleaning companies
- Tidyvibz LtdCleaning companies
- Ayyappa MTD LtdBuilders
- KM Phoenix Pond, Garden & General Maintenance LtdLandscapers and gardeners
- Eco Green Property Service LtdFinishing trades
- S and J Accident Repairs LtdPainters and decorators
What happens if Koretrix Engineering Ltd files late
If the accounts reach Companies House today, the late filing penalty is £375 (£750 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 Sep 2026 to 30 Sep 2026 | £150 |
| 1 to 3 months late | 1 Oct 2026 to 30 Nov 2026 | £375 |
| 3 to 6 months late | 1 Dec 2026 to 28 Feb 2027 | £750 |
| More than 6 months late | From 1 Mar 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2026 | £200 |
| 3 months late | 28 Feb 2027 | another £200 |
| 6 months late | 30 May 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 07865687
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 November 2011 (14 years ago)
- Registered office
- PO Box 4385, 07865687 - Companies House Default Address, Cardiff, CF14 8LH
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 30 November 2024
- Last confirmation statement
- 12 May 2026
- Previous names
- All Drainage Services Ltd (until 13 May 2026)
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Cardiff
Other active specialist construction companies registered in Cardiff.
- LDJ Lifting Services Limited2019
- LDN Services Limited2016
- Lekker Services Ltd2020
- Loft Space Solutions Limited2007
- LRH Construction Ltd2025
- Lucas and Cruz Property Maintenance Ltd2020
- Lydair (Commissioning) Limited2011
- M F Scenic Ltd2012
All specialist construction companies in Cardiff · All trades in Cardiff · Specialist contractors across the UK
Frequently asked questions
When are Koretrix Engineering Ltd's accounts due?
Koretrix Engineering Ltd's accounts were due at Companies House on 31 August 2026 and the register shows them as overdue.
When is Koretrix Engineering Ltd's CT600 due?
The CT600 for the period to 30 November 2025 is due at HMRC by 30 November 2026, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2026.
Is Koretrix Engineering Ltd still trading?
Koretrix Engineering Ltd is listed as active on the Companies House register (checked 12 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 Koretrix Engineering Ltd do?
Koretrix Engineering Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Koretrix Engineering Ltd?
Koretrix Engineering Ltd was incorporated on 30 November 2011, 14 years ago.
What is the penalty if Koretrix Engineering 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 Koretrix Engineering Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.