- Companies
- Plumbers and heating engineers
- Ballymena
- R & M Martin Plumbing Ltd
R & M Martin Plumbing Ltd
- Company number
- NI621886
- Incorporated
- 11 Dec 201312 years trading
- Registered office
- 107 Lisboy Road, Dunloy, Ballymena, County Antrim, BT44 9AY
- Nature of business
- Plumbing, heat and air-conditioning installation
R & M Martin Plumbing Ltd is a 12-year-old private limited company registered in Ballymena, company number NI621886, one of 22 plumbing and heating companies in Ballymena. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 down £12K (-11.5%) on the year before, to £90K.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £187K against £154K owed within a year: 1.2 times cover.
- 9 employees on average, down from 11 the year before.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £90K | £109K | £187K | £154K | 9 |
| 31 Jan 2024 | £101K | £100K | £191K | £159K | 11 |
| 31 Jan 2023 | £123K | £90K | £181K | £137K | 0 |
| 31 Jan 2022 | £143K | £113K | £181K | £130K | 8 |
| 31 Jan 2021 | £114K | £350K | £411K | £364K | 0 |
| 31 Jan 2020 | £77K | £254K | £305K | £301K | |
| 31 Jan 2019 | £84K | £185K | £250K | £229K | |
| 31 Jan 2018 | £109K | £172K | £278K | £243K | 5 |
| 31 Jan 2017 | £133K | £210K | £260K | £216K | |
| 31 Jan 2016 | £131K | £261K | £279K | £216K |
Where R & M Martin Plumbing Ltd is registered
The registered office is in Ballymena (BT44), in the Causeway Coast and Glens local authority area, Northern Ireland. Show BT44 9AY on a map.
Other trade companies in BT44
- Ono Joinery LtdJoiners and carpenters
- Renarsjk LtdCleaning companies
- O'Kane Industrial Systems LtdMachinery repair and installation
- Commercial Agri Structures LtdBuilders
- MCG Propco Whitehead LimitedProperty developers
- Amg Rib Repair Ireland LimitedMachinery repair and installation
- Suredry-NI LimitedPlumbers and heating engineers
- CSP and Maintenance LtdFinishing trades
What happens if R & M Martin Plumbing 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 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
- NI621886
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 December 2013 (12 years ago)
- Registered office
- 107 Lisboy Road, Dunloy, Ballymena, County Antrim, BT44 9AY
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 11 December 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 Ballymena
Other active plumbing and heating companies registered in Ballymena.
- RC Mechanical Services Ltd2026
- Richmond Mechanical Limited2022
- SD Plumbing + Heating Contracts Limited2018
- Shane FM Ltd2023
- Shane Mechanical (London) Ltd2018
- Steven Davis Plumbing Ltd2026
- Suredry-NI Limited2026
- Tri-Heat Limited2011
All plumbing and heating companies in Ballymena · All trades in Ballymena · Plumbers and heating engineers across the UK
Frequently asked questions
When are R & M Martin Plumbing Ltd's accounts due?
R & M Martin Plumbing Ltd's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is R & M Martin Plumbing Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is R & M Martin Plumbing Ltd still trading?
R & M Martin Plumbing 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 R & M Martin Plumbing Ltd do?
R & M Martin Plumbing Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is R & M Martin Plumbing Ltd?
R & M Martin Plumbing Ltd was incorporated on 11 December 2013, 12 years ago.
What is the penalty if R & M Martin Plumbing 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 R & M Martin Plumbing 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.