- Companies
- Plumbers and heating engineers
- Londonderry
- North West Mechanical Services Ltd
North West Mechanical Services Ltd
- Company number
- NI037668
- Incorporated
- 5 Jan 200026 years trading
- Registered office
- Unit 3, Elagh Business Park, Buncrana Road, Londonderry, BT48 8QH
- Nature of business
- Plumbing, heat and air-conditioning installation
North West Mechanical Services Ltd is a 26-year-old private limited company registered in Londonderry, company number NI037668, one of 26 plumbing and heating companies in Londonderry. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 £232K (+27.1%) on the year before, to £1.1M.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £958K against £371K owed within a year: 2.6 times cover.
- 22 employees on average, up from 17 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 Dec 2025 | £1.1M | £635K | £958K | £371K | 22 |
| 31 Dec 2024 | £859K | £550K | £753K | £380K | 17 |
| 31 Dec 2023 | £847K | £634K | £808K | £431K | 32 |
| 31 Dec 2022 | £687K | £247K | £562K | £328K | 60 |
| 31 Dec 2021 | £528K | £199K | £585K | £500K | 69 |
| 31 Dec 2020 | £295K | £6,212 | £383K | £512K | 71 |
| 31 Dec 2019 | £268K | £54K | £426K | £636K | 109 |
| 31 Dec 2018 | £560K | £174K | £766K | £625K | |
| 31 Dec 2017 | £473K | £34K | £351K | £271K | |
| 31 Dec 2016 | £450K | £151K | £506K | £418K |
Where North West Mechanical Services Ltd is registered
The registered office is in Londonderry (BT48), in the Derry City and Strabane local authority area, Northern Ireland. Show BT48 8QH on a map.
Other trade companies in BT48
- Neat & Nurtured Vics Cleaning LimitedCleaning companies
- Ked Brick & Blockwork LtdBuilders
- Zapcars LtdMotor traders
- TMC Electrics LtdElectricians
- Northern Diesels LtdMotor traders
- Coyle Reclamation & Salvage LtdSpecialist contractors
- George MCG Mechanical LtdElectricians
- KK Electrical Solutions Ireland LimitedElectricians
What happens if North West Mechanical Services 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 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- NI037668
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 January 2000 (26 years ago)
- Registered office
- Unit 3, Elagh Business Park, Buncrana Road, Londonderry, BT48 8QH
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 5 January 2026
- Charges (mortgages)
- 2 outstanding of 3 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 Londonderry
Other active plumbing and heating companies registered in Londonderry.
- Northern Boiler Systems Limited2014
- NW Plumbing and Heating Ltd2022
- Original Heating Limited2012
- P Lynch Plumbing & Heating Limited2022
- RK Gas Installations Ltd2002
- Thermech UK Ltd2024
- Tirkeeran Trading Ltd2020
- TP McCloskey Limited2007
All plumbing and heating companies in Londonderry · All trades in Londonderry · Plumbers and heating engineers across the UK
Frequently asked questions
When are North West Mechanical Services Ltd's accounts due?
North West Mechanical Services Ltd's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is North West Mechanical Services Ltd's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is North West Mechanical Services Ltd still trading?
North West Mechanical Services 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 North West Mechanical Services Ltd do?
North West Mechanical Services Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is North West Mechanical Services Ltd?
North West Mechanical Services Ltd was incorporated on 5 January 2000, 26 years ago.
What is the penalty if North West Mechanical Services 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 North West Mechanical Services 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.