Company lists · Data refreshed September 2026

Top 25 Construction companies based in Ireland

Name: Construction companies based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 587 companies tracked

RevenueBase lists 587 construction companies based in Ireland, with 20,534 business contacts and 8,274 email addresses, as of September 2026. Dublin is the single most-represented city among the companies on this list. Use the directory to research construction providers and identify relevant business contacts.

Construction companies plan, manage, and carry out building, renovation, civil engineering, infrastructure, and related construction work for commercial, residential, industrial, and public-sector projects. This list covers companies that provide construction, building, renovation, site development, infrastructure, or related project services. Ranked by team size, largest first. Data current as of September 6, 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 6, 2026 86% judged on-target in blind review

587Companies

20,534Contacts tracked

8,274Verified emails

852Mobile numbers

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The 25 largest construction companies based in Ireland

Ranked by team size

Top 25 of 587 construction companies based in Ireland, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to construction companies: 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	Mercury	Strong evidence	Dublin, IrelandHQ checked Sep 6, 2026	1,001-5,000	2,418 contacts →
	Strong evidence “Mercury is the European leader in construction solutions.” Source: RevenueBase Database · checked Sep 6, 2026
2	Jones Engineering	Indirect evidence	Dublin 4, IrelandHQ checked Sep 6, 2026	1,001-5,000	2,415 contacts →
	Indirect evidence “Jones Engineering is a multi-disciplined engineering contracting company, offering the complete range of engineering and building services installations.” Source: RevenueBase Database · checked Sep 6, 2026
3	Designer Group	Indirect evidence	Dublin, IrelandHQ checked Sep 6, 2026	1,001-5,000	911 contacts →
	Indirect evidence “Designer Group is a leading Irish-owned engineering contractor delivering projects across Energy & Industrial, Data Centres and Building Services.” Source: RevenueBase Database · checked Sep 6, 2026
4	JJ Rhatigan & Company	Indirect evidence	Galway, IrelandHQ checked Sep 6, 2026	501-1,000	722 contacts →
	Indirect evidence “JJ Rhatigan & Company is one of Ireland’s leading general building contractors, with offices in Galway, Dublin, Cork, Sligo and London.” Source: RevenueBase Database · checked Sep 6, 2026
5	John Paul Construction	Strong evidence	Dublin, IrelandHQ checked Sep 6, 2026	501-1,000	672 contacts →
	Strong evidence “Founded in 1949, John Paul Construction are leading international specialists in construction, infrastructure and fit-out with a portfolio of major projects for National and…” Source: RevenueBase Database · checked Sep 6, 2026
6	Ward And Burke	Strong evidence	Kilcolgan, IrelandHQ checked Sep 6, 2026	1,001-5,000	632 contacts →
	Strong evidence “Since its establishment, Ward & Burke has sought to develop and adopt the ideals and aspirations to civil engineering construction and currently delivers class leading, reliable…” Source: RevenueBase Database · checked Sep 6, 2026
7	WALLS	Strong evidence	Malahide Road, IrelandHQ checked Sep 6, 2026	501-1,000	450 contacts →
	Strong evidence “Walls Construction is one of Ireland’s leading construction companies.” Source: RevenueBase Database · checked Sep 6, 2026
8	Collen Construction	Indirect evidence	Dublin 3, IrelandHQ checked Sep 6, 2026	201-500	421 contacts →
	Indirect evidence “Established in 1810 and trading as Collen Bros.” Source: RevenueBase Database · checked Sep 6, 2026
9	Coffey	Strong evidence	Athenry, IrelandHQ checked Sep 6, 2026	201-500	324 contacts →
	Strong evidence “Coffey is a family-owned civil engineering-led company operating in every major construction sector throughout Ireland and the UK.” Source: RevenueBase Database · checked Sep 6, 2026
10	FLYNN	Strong evidence	Dublin 11, IrelandHQ checked Sep 6, 2026	51-200	273 contacts →
	Strong evidence “Flynn is an International Construction Business executing projects across the Island of Ireland, the UK and mainland Europe.” Source: RevenueBase Database · checked Sep 6, 2026
11	ORS	Strong evidence	Dublin, IrelandHQ checked Sep 6, 2026	51-200	270 contacts →
	Strong evidence “Since 1991, ORS has led the way in anticipating and responding to diverse client requirements in the construction industry.” Source: RevenueBase Database · checked Sep 6, 2026
12	Elliott Group	Strong evidence	Cavan, IrelandHQ checked Sep 6, 2026	201-500	239 contacts →
	Strong evidence “Construction has always been a pivotal part of the Elliott family.” Source: RevenueBase Database · checked Sep 6, 2026
13	Bennett Construction LTD	Strong evidence	Co Westmeath, IrelandHQ checked Sep 6, 2026	51-200	203 contacts →
	Strong evidence “Bennett Construction is an international family owned construction services company with offices and projects in Dublin and London.” Source: RevenueBase Database · checked Sep 6, 2026
14	Sisk Group	Indirect evidence	Clondalkin, IrelandHQ checked Sep 6, 2026	1,001-5,000	200 contacts →
	Indirect evidence “Sisk Group is a 5th generation, 165+ year old family business.” Source: RevenueBase Database · checked Sep 6, 2026
15	Clancy	Strong evidence	Drangan, IrelandHQ checked Sep 6, 2026	201-500	171 contacts →
	Strong evidence “Clancy is one of Ireland's leading Construction companies.” Source: RevenueBase Database · checked Sep 6, 2026
16	Conack	Strong evidence	Limerick, IrelandHQ checked Sep 6, 2026	201-500	158 contacts →
	Strong evidence “Conack Construction is a Building & Civil Engineering company based in Limerick with regional offices in Cork, Galway & Dublin.” Source: RevenueBase Database · checked Sep 6, 2026
17	Egis In Ireland	Strong evidence	Dundrum Road, IrelandHQ checked Sep 6, 2026	501-1,000	143 contacts →
	Strong evidence “Egis is a leading global architectural, consulting, construction engineering, operations and mobility services firm.” Source: RevenueBase Database · checked Sep 6, 2026
18	Vision Contracting	Strong evidence	Cork, IrelandHQ checked Sep 6, 2026	51-200	132 contacts →
	Strong evidence “Vision Contracting Ltd is an Irish based construction services company and is a leading builder in a number of niche market segments.” Source: RevenueBase Database · checked Sep 6, 2026
19	Cunningham	Strong evidence	Dublin 15, IrelandHQ checked Sep 6, 2026	201-500	122 contacts →
	Strong evidence “Founded in 2006, Cunningham are one of Europe & the UK’s leading construction companies.” Source: RevenueBase Database · checked Sep 6, 2026
20	Siac Construction LTD	Indirect evidence	Dublin, IrelandHQ checked Sep 6, 2026	201-500	107 contacts →
	Indirect evidence “Founded in 1913, SIAC's business has grown through our reputation for delivering quality projects that always meet and often exceed our clients' expectations.” Source: RevenueBase Database · checked Sep 6, 2026
21	Duggan Brothers Contractors Limited	Indirect evidence	Templemore, IrelandHQ checked Sep 6, 2026	51-200	94 contacts →
	Indirect evidence “Founded in 1923, with its Head Office in Templemore,Co.” Source: RevenueBase Database · checked Sep 6, 2026
22	MMD Construction Cork LTD	Strong evidence	Cork, IrelandHQ checked Sep 6, 2026	51-200	89 contacts →
	Strong evidence “MMD Construction Ltd was formed in June MMD Construction Ltd is unique in that it draws on resources with strong project management skills and experienced site management…” Source: RevenueBase Database · checked Sep 6, 2026
23	Stewart Construction	Strong evidence	Dublin City, IrelandHQ checked Sep 6, 2026	51-200	87 contacts →
	Strong evidence “Stewart Construction is a leading main contractor with a proven track record of successful project delivery through the generations.” Source: RevenueBase Database · checked Sep 6, 2026
24	Purcell Construction	Strong evidence	Galway, IrelandHQ checked Sep 6, 2026	51-200	85 contacts →
	Strong evidence “Purcell Construction is a leading Irish Building Contractor.” Source: RevenueBase Database · checked Sep 6, 2026
25	Ganson	Indirect evidence	Dublin, IrelandHQ checked Sep 6, 2026	51-200	80 contacts →
	Indirect evidence “Ganson Building and Civil Engineering Contractors (Ganson) was set up by Paul Mc Quaid & David Rogers, both qualified civil engineers, in 2003 in Balbriggan, Co.” Source: RevenueBase Database · checked Sep 6, 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: construction companies. 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 construction companies.
Partial evidence: Its own public description names part of construction companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name construction companies. 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 587 construction companies based in Ireland

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Construction companies based in Ireland at a glance

As of Sep 6, 2026

40.3%Verified-email coverage

4.1%Mobile-number coverage

35.0Average contacts per company

11-50Median size (employees)

12.9%Largest-city concentration · Dublin

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

179

11-50

272

51-200

100

201-500

501-1,000

1,001-5,000

5,001-10,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

7,7940–30

45131–60

361–90

290–180

24180+

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 construction companies, 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 “construction companies”. 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 construction companies), 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 construction companies, 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, 8,274 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 6, 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.

Construction companies by metro

Construction companies in Dublin76

Frequently asked

How many construction companies are based in Ireland?

The directory contains 587 construction companies based in Ireland.

What do construction companies do?

Construction companies plan, manage, and perform building, renovation, infrastructure, and related construction work for clients across multiple sectors.

How can I find contacts at construction companies?

The directory includes 20,534 business contacts and 8,274 email addresses associated with construction companies.

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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.