- Companies
- Plumbers and heating engineers
- Belfast
- Mayne Plumbing & Heating Ltd
Mayne Plumbing & Heating Ltd
- Company number
- NI055800
- Incorporated
- 30 Jun 200521 years trading
- Registered office
- c/o Moore Braniff, 2 Beechill Business Park, 96 Beechill Road, Belfast, BT8 7QN
- Nature of business
- Plumbing, heat and air-conditioning installation
Mayne Plumbing & Heating Ltd is a 21-year-old private limited company registered in Belfast, company number NI055800, one of 99 plumbing and heating companies in Belfast. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 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 £35K (+309.2%) on the year before, to £46K.
- Net assets rose in 6 of 7 year-on-year comparisons on record.
- Current assets of £123K against £86K owed within a year: 1.4 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 9 years, 2015 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jul 2025 | £46K | £96K | £123K | £86K | 0 |
| 31 Jul 2024 | £11K | £43K | £73K | £56K | 4 |
| 31 Jul 2023 | £4,007 | £45K | £75K | £62K | 4 |
| 31 Jul 2022 | £1,073 | £38K | £62K | £46K | 6 |
| 31 Jul 2021 | -£417 | £60K | £96K | £69K | 6 |
| 31 Jul 2020 | £31K | £87K | £94K | £42K | 5 |
| 31 Jul 2019 | £898 | £15K | £23K | £27K | 5 |
| 31 Jul 2016 | £17K | £36K | £44K | £33K | |
| 31 Jul 2015 | -£29K | £14K | £26K | £66K |
Where Mayne Plumbing & Heating Ltd is registered
The registered office is in Belfast (BT8), in the Lisburn and Castlereagh local authority area, Northern Ireland. Show BT8 7QN on a map.
Other trade companies in BT8
- Flexi Van LtdMotor traders
- Rahftee LimitedLandscapers and gardeners
- Autoconi LtdMechanics and garages
- P Kennedy Construction LtdBuilders
- Golden Goose Developments LimitedProperty developers
- Scadin One LtdSpecialist contractors
- Reciproco LtdSpecialist contractors
- CM Flips LtdProperty developers
Also registered at this address
4 other companies use the same registered office as Mayne Plumbing & Heating Ltd.
- Autoconi LtdMechanics and garages
- Civil Engineering Services & Supplies LimitedBuilders
- Evolv Electrical Solutions LtdElectricians
- Phil-Tec Ireland LimitedElectricians
What happens if Mayne 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 30 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- NI055800
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 June 2005 (21 years ago)
- Registered office
- c/o Moore Braniff, 2 Beechill Business Park, 96 Beechill Road, Belfast, BT8 7QN
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 4 March 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
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 Belfast
Other active plumbing and heating companies registered in Belfast.
- McDowell Plumbing Services Ltd2022
- McKee and Bailie Ltd2025
- MG Gas N.I Ltd2026
- Northern Mechanical Ltd1978
- Plumbing Heating Gas Technical Services Ltd2024
- Pools & Leisure Ireland Ltd2021
- Priority Gas & Plumbing NI Ltd2026
- Pump & Garage Equipment Services Limited2011
All plumbing and heating companies in Belfast · All trades in Belfast · Plumbers and heating engineers across the UK
Frequently asked questions
When are Mayne Plumbing & Heating Ltd's accounts due?
Mayne Plumbing & Heating Ltd's next accounts are due at Companies House by 30 April 2027 (in 198 days), covering the period to 31 July 2026.
When is Mayne Plumbing & Heating Ltd's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is Mayne Plumbing & Heating Ltd still trading?
Mayne 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 Mayne Plumbing & Heating Ltd do?
Mayne Plumbing & Heating Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Mayne Plumbing & Heating Ltd?
Mayne Plumbing & Heating Ltd was incorporated on 30 June 2005, 21 years ago.
What is the penalty if Mayne 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 Mayne 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.