Heating, plumbing and air conditioning firms to acquire in Northern Ireland

Name: Heating, plumbing and air conditioning firms to acquire in Northern Ireland
Creator: Firmbase
License: https://firmbase.co/terms

Updated 9 November 2026

Looking to acquire a heating, plumbing or air conditioning firm in Northern Ireland? Firmbase ranks 110 heating, plumbing and air conditioning firms using public company information to help buyers prioritise firms for research and potential outreach. The Approach Score ranks firms using public signals including director age and tenure, ownership, business scale, financial strength and recent changes. These firms are not listed for sale, and the ranking does not indicate that an owner is considering a sale.

The median firm has 8 staff and has been in business for 10 years. Looking beyond Northern Ireland? Explore the full UK list of heating, plumbing and air conditioning firms.

110

Firms

UK 4,175

17%

Every director 55+

UK 20%

31%

Held 75%+ by one person

UK 29%

Median years in business

UK 14

Median headcount

UK 8

£500k to £1m

Median turnover band

UK £500k to £1m · includes our estimates

The first 25 firms, in Approach Score order

Rank	Firm	Approach Score	The facts behind the score
1	Mooney Mechanical Installations Ballymena	Approach Score 86/100	In post since 2007 1 individual holds 75%+ · held via a trust or firm · independent More about this firm 15 staff · turnover est. £1.3m Net assets £229k (Apr 2025) Company no. NI064233 · Companies House mooneymechanicalinstallations.com
2	Sydney Brown & SON Dungannon	Approach Score 85/100	Longest in post since 2003 2 individuals hold 50%+ · independent More about this firm 6 staff · turnover est. £1m Net assets £987k (Dec 2025) Director resigned Jan 2026 · PSC register changed Jan 2026 Company no. NI045082 · Companies House
3	MJ Plumbing Contracts Newry	Approach Score 78/100	Director aged 55-59 · in post since 2012 1 individual holds 75%+ · independent More about this firm 6 staff · turnover est. £714k Net assets £358k (May 2025) PSC register changed Nov 2025 Company no. NI612947 · Companies House
4	BSH Heating & Cooling Belfast	Approach Score 77/100	1 director aged 60-64, 1 aged 55-59 · longest in post since 2000 2 individuals hold 50%+ · held via a trust or firm · independent More about this firm 7 staff · turnover est. £508k Net assets £195k (Mar 2025) Company no. NI037693 · Companies House bsh-limited.com
5	Classique Fireplaces Carrickfergus, CO. Antrim	Approach Score 76/100	1 director aged 65-69, 1 aged 60-64 · longest in post since 2021 2 individuals hold 50%+ · independent More about this firm 5 staff · turnover est. £466k Net assets £18k (Mar 2025) Company no. NI680276 · Companies House classiquefireplaces.com
6	KD Gas Services Lurgan, CO. Armagh	Approach Score 75/100	Director aged 55-59 · in post since 2022 1 individual holds 75%+ · independent More about this firm 5 staff · turnover est. £1.3m Net assets £282k (Apr 2025) Company no. NI685410 · Companies House kd-gas-services.com
7	W E Elliott & SON Newry, Co Down A director sits on 4 or more companies	Approach Score 74/100	Longest in post since 2003 2 individuals hold 50%+ · independent More about this firm 8 staff · turnover £1.5m Net assets £3.4m (Aug 2024) Company no. NI047730 · Companies House elliottshipchandler.com
8	Energy Tech (NI) Armagh, CO. Armagh	Approach Score 73/100	Director aged 55-59 · in post since 2014 2 individuals hold 50%+ · independent More about this firm 5 staff · turnover est. £1m Net assets £296k (Jun 2025) Company no. NI625540 · Companies House energytechni.com
9	Bateson Bros Magherafelt, Co Derry	Approach Score 72/100	Longest in post since 2011 2 individuals hold 50%+ · independent More about this firm 8 staff · turnover est. £443k Net assets £31k (Mar 2025) Company no. NI605761 · Companies House
10	MDO Mechanical	Approach Score 72/100	1 director aged 60-64, 1 aged 55-59 · longest in post since 2009 2 individuals hold 50%+ · independent More about this firm 8 staff · turnover est. £469k Net assets £25k (Apr 2026) Company no. NI071595 · Companies House
11	Nwms Londonderry	Approach Score 70/100	2 directors aged 55-59 · longest in post since 2000 Independent More about this firm 22 staff · turnover est. £2m Net assets £1.1m (Dec 2025) Company no. NI037668 · Companies House nwms.org
12	Tkbini Newtownabbey	Approach Score 70/100	Director aged 55-59 · in post since 2020 1 individual holds 75%+ · independent More about this firm 13 staff · turnover est. £333k Net assets £2k (Aug 2025) Company no. NI671587 · Companies House
13	Northern Mechanical Belfast	Approach Score 70/100	2 directors aged 55-59 · longest in post since 2008 2 individuals hold 50%+ · independent More about this firm 5 staff · turnover est. £508k Net assets £133k (May 2025) Company no. NI012645 · Companies House
14	John Lynn Plumbing & Heating Cookstown, CO. Tyrone	Approach Score 70/100	Longest in post since 2014 Corporate owner More about this firm 8 staff · turnover est. £1.7m Net assets £643k (Feb 2025) Company no. NI622656 · Companies House
15	BJ McGrath Mechanical Ltd Dungannon, County Tyrone	Approach Score 69/100	Longest in post since 2019 Independent More about this firm 8 staff · turnover est. £4.3m Net assets £1.6m (Dec 2024) Company no. NI661836 · Companies House
16	Cassidy Bros. (plumbing & Heating) Coleraine	Approach Score 68/100	In post since 2026 Held via a trust or firm · independent More about this firm 6 staff · turnover est. £472k Net assets £79k (Mar 2025) Director resigned Nov 2025 · PSC register changed Mar 2026 Company no. NI068489 · Companies House
17	Newline Mechanical Services Newtownabbey, Co Antrim	Approach Score 67/100	Director aged 65-69 · in post since 2007 2 individuals hold 50%+ · independent More about this firm 5 staff · turnover est. £553k Company no. NI067444 · Companies House
18	Boiler Rapid Repair Newtownards	Approach Score 66/100	2 directors aged 55-59 · longest in post since 2003 2 individuals hold 50%+ · independent More about this firm 8 staff · turnover est. £575k Net assets £126k (Apr 2025) Company no. NI032102 · Companies House boilerrapidrepair.com
19	DG GAS Safety Belfast	Approach Score 66/100	1 director aged 60-64, 1 aged 45-49 · longest in post since 2016 2 individuals hold 50%+ · independent More about this firm 7 staff · turnover est. £293k Net assets £72k (Feb 2026) Company no. NI636509 · Companies House dggas.co.uk
20	A & S Mechanical (N.I.) Magherafelt, CO. Londonderry	Approach Score 65/100	We hold older figures than Companies House 1 director aged 60-64, 1 aged 55-59 · longest in post since 2011 2 individuals hold 50%+ · independent More about this firm 9 staff · turnover est. £7.1m Net assets £973k (Oct 2023) · newer accounts made up to Oct 2025 Company no. NI609885 · Companies House
21	C H P Mechanical Services Dundrum, CO. Down	Approach Score 65/100	Director aged 50-54 · in post since 2013 1 individual holds 75%+ · independent More about this firm 8 staff · turnover est. £1.6m Net assets £615k (Mar 2025) Company no. NI617085 · Companies House chpmechanical.com
22	Crystalair Services Ballynahinch	Approach Score 64/100	Director aged 45-49 · in post since 2005 1 individual holds 75%+ · independent More about this firm 6 staff · turnover est. £695k Net assets £254k (Oct 2024) Company no. NI056919 · Companies House crystal-air.com
23	TTS Plumbing and Heating Newry, Co Down	Approach Score 64/100	Director aged 50-54 · in post since 2016 1 individual holds 75%+ · independent More about this firm 8 staff · turnover est. £987k Net assets £986k (Dec 2024) Company no. NI641893 · Companies House
24	F & S Plumbing Ltd Bellaghy, Derry	Approach Score 63/100	1 director aged 60-64, 1 aged under 45 · longest in post since 2015 Independent More about this firm 7 staff · turnover est. £1.1m Net assets £303k (Sep 2025) Company no. NI635383 · Companies House
25	E.R.M. Mechanical Services Londonderry	Approach Score 63/100	Director aged 65-69 · in post since 2022 2 individuals hold 50%+ · independent More about this firm 6 staff · turnover est. £293k Net assets -£176k (Sep 2025) Director resigned Jun 2025 Company no. NI028540 · Companies House

85 more firms are in the list, in Approach Score order.

You're seeing the first 25. Buy all 110 for £799 + VAT, with the facts behind each score, director names, shareholders and financials.

Buy the list of all 110 firms, with director names, ages and shareholders

Each row comes with the facts behind its score, financials with dates and contact details.

What's in the file

One row per firm, in Approach Score order, as Excel + CSV.

It holds the facts behind each score, points for each part of the score, financials with dates, publicly available contact details, where identified, director names and named shareholders.

Some people with significant control appear as Other individual, with no further detail. Director email lookups are not included.

How this list is filtered

5 or more staff, from filed headcount or our estimate where none is filed.
Registered office in Northern Ireland.

See every filter on the UK list

How this list is built

The Approach Score ranks firms mainly on public Companies House information about owner tenure and age, ownership, size, financial strength and recent register changes.

Firms with higher scores appear first in each list.

Use the ranking to order research, then check each business directly.

Read how the Approach Score works

What it does not mean

No firm here is for sale, and the score says nothing about any owner's plans.

At least 95% of the firms where we hold directors had them checked in or after November 2026.

What we do not cover

Regulatory information is not included in this list. Buyers should check the relevant register as part of their due diligence. For gas work, check businesses and engineers on the Gas Safe Register. For relevant refrigeration and air conditioning work, verify company F-gas certification with its issuing body, using registers such as REFCOM Active Certificates.

Why age bands but no people's names

Age bands come from the month and year of birth on Companies House. This page shows no exact ages and no people's names. Both come with the purchased list. The band edges from 45 to 65 are the ages where the score changes. A row shows no age bands when a director's surname is in the firm's name, its group's name or its website. Those directors' ages still count towards the score.

Is this your firm?

You can ask us to take it off every acquisition page, and out of every list we sell after that. Give us your name and work email, and we send you a link to confirm. If your email address is on the firm's own website domain, the firm comes off once you confirm. If it is not, a person reviews your request first. A list already sold stays with its buyer.

To have personal data erased, see our privacy policy.

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The standard Firmbase list

Plumbing & Heating Companies in the UK