- Companies
- Plumbers and heating engineers
- Newry
- Cathal McMahon Plumbing & Heating Ltd
Cathal McMahon Plumbing & Heating Ltd
- Company number
- NI677671
- Incorporated
- 23 Mar 20215 years trading
- Registered office
- 26 Cabragh Road, Mayobridge, Newry, BT34 2HX
- Nature of business
- Plumbing, heat and air-conditioning installation
Cathal McMahon Plumbing & Heating Ltd is a 5-year-old private limited company registered in Newry, company number NI677671, one of 72 plumbing and heating companies in Newry. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 2027.
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 £10K (+13.2%) on the year before, to £89K.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £205K against £141K owed within a year: 1.5 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 5 years, 2022 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £89K | £205K | £141K | 3 | |
| 31 Mar 2025 | £79K | £226K | £183K | 3 | |
| 31 Mar 2024 | £40K | £188K | £192K | 3 | |
| 31 Mar 2023 | £43K | £196K | £181K | 3 | |
| 31 Mar 2022 | £8,785 | £110K | £124K | 3 |
Where Cathal McMahon Plumbing & Heating Ltd is registered
The registered office is in Newry (BT34), in the Newry, Mourne and Down local authority area, Northern Ireland. Show BT34 2HX on a map.
Other trade companies in BT34
- JMP Live LimitedElectricians
- SSL Solar & Electrical LimitedElectricians
- Ocn Construction LtdBuilders
- Warren Properties Ireland LimitedBuilders
- Rog Electrical LtdElectricians
- DMN Mechanics LimitedMotor traders
- M & M Consultants Ire LtdSpecialist contractors
- C Quinn Contracts LtdBuilders
What happens if Cathal McMahon Plumbing & Heating 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- NI677671
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 March 2021 (5 years ago)
- Registered office
- 26 Cabragh Road, Mayobridge, Newry, BT34 2HX
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 22 March 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 Newry
Other active plumbing and heating companies registered in Newry.
- CJ Mechanical Ltd2017
- Condensation Solutions Ltd2016
- Cor Mac Plumbing and Heating Ltd2020
- D Doyle Plumbing & Heating Ltd2022
- Decam Plumbing & Heating Ltd2026
- Delta Mech Ltd2020
- Delta Tech Mechanical Ltd2023
- East Coast Leak Detectors Ltd2021
All plumbing and heating companies in Newry · All trades in Newry · Plumbers and heating engineers across the UK
Frequently asked questions
When are Cathal McMahon Plumbing & Heating Ltd's accounts due?
Cathal McMahon Plumbing & Heating Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Cathal McMahon Plumbing & Heating Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Cathal McMahon Plumbing & Heating Ltd still trading?
Cathal McMahon Plumbing & Heating 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 Cathal McMahon Plumbing & Heating Ltd do?
Cathal McMahon Plumbing & Heating Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Cathal McMahon Plumbing & Heating Ltd?
Cathal McMahon Plumbing & Heating Ltd was incorporated on 23 March 2021, 5 years ago.
What is the penalty if Cathal McMahon Plumbing & Heating 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 Cathal McMahon Plumbing & Heating 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.