- Companies
- Plumbers and heating engineers
- Coleraine
- DJM Plumbing Ltd
DJM Plumbing Ltd
- Company number
- NI643960
- Incorporated
- 15 Feb 20179 years trading
- Registered office
- 37 Shanlongford Road, Ringsend, Coleraine, BT51 4HU
- Nature of business
- Plumbing, heat and air-conditioning installation
DJM Plumbing Ltd is a 9-year-old private limited company registered in Coleraine, company number NI643960, one of 13 plumbing and heating companies in Coleraine. Its next accounts are due at Companies House on 30 December 2026, and the CT600 for the period to 30 March 2026 is due at HMRC on 30 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 down £63K (-43.7%) on the year before, to £81K.
- Net assets rose in 3 of 7 year-on-year comparisons on record.
- Current assets of £52K against £28K owed within a year: 1.9 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 8 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Mar 2025 | £81K | £11K | £52K | £28K | 0 |
| 30 Mar 2024 | £144K | £88K | £155K | £41K | 4 |
| 30 Mar 2023 | £175K | £105K | £244K | £101K | 4 |
| 30 Mar 2022 | £191K | £160K | £309K | £157K | 4 |
| 31 Mar 2021 | £205K | £241K | £401K | £235K | 5 |
| 31 Mar 2020 | £174K | £250K | £359K | £223K | 5 |
| 31 Mar 2019 | £135K | £221K | £351K | £251K | 4 |
| 31 Mar 2018 | £79K | £181K | £248K | £207K | 5 |
Where DJM Plumbing Ltd is registered
The registered office is in Coleraine (BT51), in the Causeway Coast and Glens local authority area, Northern Ireland. Show BT51 4HU 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 DJM 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 30 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 31 Dec 2026 to 30 Jan 2027 | £150 |
| 1 to 3 months late | 31 Jan 2027 to 30 Mar 2027 | £375 |
| 3 to 6 months late | 31 Mar 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 | 31 Mar 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 | 30 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
- NI643960
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 February 2017 (9 years ago)
- Registered office
- 37 Shanlongford Road, Ringsend, Coleraine, BT51 4HU
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 March 2025
- Last confirmation statement
- 14 February 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.
- Gilmore Plumbing Ltd2011
- M-Tech Mechanical Ltd2018
- Mem Plumbing Ltd2009
- P & H Services (Mechanical) Limited2003
- PJ Mullan & Sons Ltd2003
- PMF Plumbing & Heating Services Ltd2016
- Acesof Ltd2026
- BD Mullan Plumbing & Heating Ltd2018
All plumbing and heating companies in Coleraine · All trades in Coleraine · Plumbers and heating engineers across the UK
Frequently asked questions
When are DJM Plumbing Ltd's accounts due?
DJM Plumbing Ltd's next accounts are due at Companies House by 30 December 2026 (in 78 days), covering the period to 30 March 2026.
When is DJM Plumbing Ltd's CT600 due?
The CT600 for the period to 30 March 2026 is due at HMRC by 30 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 31 December 2026.
Is DJM Plumbing Ltd still trading?
DJM 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 DJM Plumbing Ltd do?
DJM Plumbing Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is DJM Plumbing Ltd?
DJM Plumbing Ltd was incorporated on 15 February 2017, 9 years ago.
What is the penalty if DJM 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 DJM 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.