Company lists · Data refreshed September 2026

Top 25 Building systems maintenance contractors based in Ireland

Name: Building systems maintenance contractors based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 76 companies tracked

RevenueBase identified 76 building systems maintenance contractors headquartered in Ireland as of September 2026 and tracks 841 professional contacts across them, including 402 with verified work emails. Dublin is the largest hub.

This list covers building systems maintenance contractors headquartered in Ireland, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

76Companies

841Contacts tracked

402Verified emails

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The 25 largest building systems maintenance contractors based in Ireland

Ranked by team size

Top 25 of 76 building systems maintenance contractors based in Ireland, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to building systems maintenance contractors: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Mastertech Group	Strong evidence	Tallaght, IrelandHQ checked Sep 16, 2026	51-200	86 contacts →
	Strong evidence “Mastertech Group is a leading provider of integrated building services, engineering solutions, and sustainable maintenance support across Ireland.” Source: RevenueBase Database · checked Sep 16, 2026
2	Quinn Downes Group	Indirect evidence	Dublin 12, IrelandHQ checked Sep 16, 2026	51-200	85 contacts →
	Indirect evidence “Quinn Downes Mechanical Services Ltd was founded in by our Directors Pat Quinn and Derek Downes.” Source: RevenueBase Database · checked Sep 16, 2026
3	Mckeon Group	Strong evidence	Ashbourne, IrelandHQ checked Sep 16, 2026	51-200	67 contacts →
	Strong evidence “McKeon Group is a main contractor and facilities maintenance partner based in Ashbourne, Co Meath, specialising in large-scale new-build, extension, fit out and deep energy…” Source: RevenueBase Database · checked Sep 16, 2026
4	Burlington Engineering	Partial evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	64 contacts →
	Partial evidence “Burlington Engineering Limited is a building services engineering provider with a long established reputation as one of the leading companies operating in its field.” Source: RevenueBase Database · checked Sep 16, 2026
5	Thermodial	Partial evidence	Magna Business Park, IrelandHQ checked Sep 16, 2026	51-200	48 contacts →
	Partial evidence “Thermodial are experts in planned preventative maintenance (PPM) of heating, ventilation and air conditioning (HVAC), BEMS, electrical and water services – since 1986.” Source: RevenueBase Database · checked Sep 16, 2026
6	Lynskey Engineering LTD	Partial evidence	Dublin 10, IrelandHQ checked Sep 16, 2026	51-200	47 contacts →
	Partial evidence “Lynskey Engineering Limited provide a wide scope of Mechanical Building Services covering commercial, industrial, process and mixed use developments.” Source: RevenueBase Database · checked Sep 16, 2026
7	Jcps Mechanical LTD	Partial evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	40 contacts →
	Partial evidence “JCPS Mechanical Ltd was established in 2007 by Managing Director John Corr and quickly expanded to become on of Ireland's leading Mechanical Contractors specialising in…” Source: RevenueBase Database · checked Sep 16, 2026
8	Domestic & General Property Support Services LTD	Indirect evidence	Rathcoole, IrelandHQ checked Sep 16, 2026	201-500	32 contacts →
	Indirect evidence “Domestic & General Dublin Property Support Services is a long established & much-respected facilities services company.” Source: RevenueBase Database · checked Sep 16, 2026
9	Alpha Facilities Maintenance	Partial evidence	Clonshaugh, IrelandHQ checked Sep 16, 2026	51-200	18 contacts →
	Partial evidence “Alpha Facilities Maintenance specialises in planned preventative maintenance, reactive maintenance, and 24-7-365 emergency support for commercial, retail, and industrial…” Source: RevenueBase Database · checked Sep 16, 2026
10	William Farrell Limited	Indirect evidence	Dublin 18, IrelandHQ checked Sep 16, 2026	11-50	18 contacts →
	Indirect evidence “Welcome to William Farrell Ltd.” Source: RevenueBase Database · checked Sep 16, 2026
11	Asms Mechanical Services LTD	Indirect evidence	Cork, IrelandHQ checked Sep 16, 2026	11-50	17 contacts →
	Indirect evidence “ASMS – Architectural Steel & Mechanical Services was established in 2006, it is an Irish owned Company based in the South of the Country, We operate on a national scale from small…” Source: RevenueBase Database · checked Sep 16, 2026
12	Laminar Engineering	Partial evidence	Dublin 12, IrelandHQ checked Sep 16, 2026	11-50	16 contacts →
	Partial evidence “Mechanical Engineering Contractors” Source: RevenueBase Database · checked Sep 16, 2026
13	Efficient Climate Control	Indirect evidence	Dublin 11, IrelandHQ checked Sep 16, 2026	11-50	15 contacts →
	Indirect evidence “Efficient Climate Control provides HVAC and mechanical services across commercial and industrial environments.” Source: RevenueBase Database · checked Sep 16, 2026
14	Coolair LTD	Strong evidence	Dublin 24, IrelandHQ checked Sep 16, 2026	11-50	14 contacts →
	Strong evidence “Established in 1970, Coolair have over 40 years market leading experience in the supply, installation, service and maintenance of HVAC Systems.” Source: RevenueBase Database · checked Sep 16, 2026
15	Blanchfield Heating	Indirect evidence	Kilkenny, IrelandHQ checked Sep 16, 2026	11-50	13 contacts →
	Indirect evidence “Blanchfield Heating was established in 1994 as a private owned business with a flexible client-focused approach and an appreciation of long term business relationships.” Source: RevenueBase Database · checked Sep 16, 2026
16	P.B.C. Builders LTD	Strong evidence	Limerick, IrelandHQ checked Sep 16, 2026	51-200	12 contacts →
	Strong evidence “P.B.C Builders Ltd is a Construction and Building Maintenance firm based in Limerick, Ireland.” Source: RevenueBase Database · checked Sep 16, 2026
17	Leinster Property Services Ireland	Indirect evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	11 contacts →
	Indirect evidence “Leinster Property Services (LPS) is a professional, well established and fully compliant property services company.” Source: RevenueBase Database · checked Sep 16, 2026
18	Greenlight	Strong evidence	Dublin 12, IrelandHQ checked Sep 16, 2026	11-50	10 contacts →
	Strong evidence “Over 10 successful years providing high quality service to the building and property maintenance industry.” Source: RevenueBase Database · checked Sep 16, 2026
19	Sensori Facilities Management LTD	Indirect evidence	IrelandHQ checked Sep 16, 2026	201-500	8 contacts →
	Indirect evidence “Sensori Facilities Management has embedded the word ‘Life’ into everything it provides to its clients.” Source: RevenueBase Database · checked Sep 16, 2026
20	JR Support Services LTD	Indirect evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	8 contacts →
	Indirect evidence “Medium-to-high volume portfolios, we are offering first-class service at the most competitive prices in the market.” Source: RevenueBase Database · checked Sep 16, 2026
21	DND Group	Partial evidence	Ballycoolin, IrelandHQ checked Sep 16, 2026	11-50	8 contacts →
	Partial evidence “About Us At DND Group, we are not just a facilities and Building Services company; we are the architects of seamless, sustainable, and electrifying environments.” Source: RevenueBase Database · checked Sep 16, 2026
22	O'brien Facilities LTD	Partial evidence	Limerick, IrelandHQ checked Sep 16, 2026	11-50	8 contacts →
	Partial evidence “Our mission at O’Brien Facilities is to provide flexible and professional facilities maintenance solutions tailored to the specific needs of each of our clients.” Source: RevenueBase Database · checked Sep 16, 2026
23	Walsh & Sheehan LTD	Indirect evidence	Co. Kilkenny, IrelandHQ checked Sep 16, 2026	11-50	7 contacts →
	Indirect evidence “Walsh & Sheehan Ltd was founded in 2001 by Business Partners Owen Sheehan and Brian Walsh.” Source: RevenueBase Database · checked Sep 16, 2026
24	Juggle Group	Partial evidence	Dublin, IrelandHQ checked Sep 16, 2026	11-50	6 contacts →
	Partial evidence “Our dedicated team of Facilities Management Specialists is available 24/7 to provide you with expert service – so whether it’s your building, office, or factory, we deliver a…” Source: RevenueBase Database · checked Sep 16, 2026
25	Thermoheat Mechanical LTD	Indirect evidence	Dublin, IrelandHQ checked Sep 16, 2026	11-50	6 contacts →
	Indirect evidence “ThermoHeat is a Dublin based mechanical company that offers a complete range of heating, plumbing, ventilation and air-conditioning solutions to commercial clients.” Source: RevenueBase Database · checked Sep 16, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: building systems maintenance contractors. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names building systems maintenance contractors.
Partial evidence: Its own public description names part of building systems maintenance contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name building systems maintenance contractors. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 76 building systems maintenance contractors based in Ireland

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Building systems maintenance contractors based in Ireland at a glance

As of Sep 16, 2026

47.8%Verified-email coverage

11.1Average contacts per company

11-50Median size (employees)

22.4%Largest-city concentration · Dublin

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for Ireland, so it is reported there. Company counts and contact totals on this page are exact for Ireland, over 76 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among building systems maintenance contractors, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Ireland whose own description of what they do matches “building systems maintenance contractors”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names building systems maintenance contractors), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among building systems maintenance contractors, and records with no verified work email. Companies headquartered outside Ireland are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 402 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 16, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names building systems maintenance contractors, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many building systems maintenance contractors are there based in Ireland?

RevenueBase identified 76 building systems maintenance contractors headquartered in Ireland as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Mastertech Group, headquartered in Ireland, tops this list with the largest team on record.

Which city has the most building systems maintenance contractors?

Dublin leads with 17 headquartered companies, followed by Tallaght (3) and Cork (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 402 verified decision-maker contacts tracked across these 76 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.