- Companies
- Plumbers and heating engineers
- Coleraine
- PJ Mullan & Sons Ltd
PJ Mullan & Sons Ltd
- Company number
- NI045271
- Incorporated
- 28 Jan 200323 years trading
- Registered office
- 105 Boleran Road, Coleraine, County Londonderry, BT51 5EH
- Nature of business
- Plumbing, heat and air-conditioning installation
PJ Mullan & Sons Ltd is a 23-year-old private limited company registered in Coleraine, company number NI045271, one of 13 plumbing and heating companies in Coleraine. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 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 £891 (+0.4%) on the year before, to -£216K.
- Net assets rose in 2 of 9 year-on-year comparisons on record.
- Current assets of £97K against £365K owed within a year: 0.3 times cover.
- 3 employees on average during the year.
- 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 |
|---|---|---|---|---|---|
| 28 Feb 2025 | -£216K | £4,318 | £97K | £365K | 3 |
| 29 Feb 2024 | -£217K | £1,905 | £132K | £409K | 3 |
| 28 Feb 2023 | -£108K | £19K | £218K | £347K | 3 |
| 28 Feb 2022 | -£50K | £1,905 | £207K | £294K | 4 |
| 28 Feb 2021 | -£32K | £11K | £240K | £329K | 7 |
| 29 Feb 2020 | £4,558 | £26K | £233K | £304K | 7 |
| 28 Feb 2019 | £54K | £101K | £273K | £315K | 7 |
| 28 Feb 2018 | -£15K | -£204K | £300K | 7 | |
| 28 Feb 2017 | £4,437 | £24K | £155K | £279K | 7 |
| 29 Feb 2016 | £20K | £8,822 | £102K | £236K |
Where PJ Mullan & Sons Ltd is registered
The registered office is in Coleraine (BT51), in the Causeway Coast and Glens local authority area, Northern Ireland. Show BT51 5EH on a map.
Other trade companies in BT51
- Acesof LtdPlumbers and heating engineers
- Boylan Contracts LtdCivil engineering
- Arbour Living (NI) LimitedSpecialist contractors
- P Talbot Construction LtdBuilders
- NQ&S Autocare LtdMechanics and garages
- WHH GRP LimitedBuilders
- Full Throttle E-MX LimitedMotor traders
- RKC Civils LtdSpecialist contractors
What happens if PJ Mullan & Sons 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 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- NI045271
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 January 2003 (23 years ago)
- Registered office
- 105 Boleran Road, Coleraine, County Londonderry, BT51 5EH
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 28 February (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 28 January 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 Coleraine
Other active plumbing and heating companies registered in Coleraine.
- PMF Plumbing & Heating Services Ltd2016
- Acesof Ltd2026
- BD Mullan Plumbing & Heating Ltd2018
- Carnview Plumbing & Heating Ltd2021
- Cassidy Bros. (Plumbing & Heating) Limited2008
- Cassidy Plumbing & Heating Ltd2025
- Causeway Leak Detection Ltd2019
- DJM Plumbing Ltd2017
All plumbing and heating companies in Coleraine · All trades in Coleraine · Plumbers and heating engineers across the UK
Frequently asked questions
When are PJ Mullan & Sons Ltd's accounts due?
PJ Mullan & Sons Ltd's next accounts are due at Companies House by 30 November 2026 (in 48 days), covering the period to 28 February 2026.
When is PJ Mullan & Sons Ltd's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is PJ Mullan & Sons Ltd still trading?
PJ Mullan & Sons 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 PJ Mullan & Sons Ltd do?
PJ Mullan & Sons Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is PJ Mullan & Sons Ltd?
PJ Mullan & Sons Ltd was incorporated on 28 January 2003, 23 years ago.
What is the penalty if PJ Mullan & Sons 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 PJ Mullan & Sons 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.