Company lists · Data refreshed September 2026

Top 24 Commercial construction consulting firms based in Ireland

Name: Commercial construction consulting firms based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 406 companies tracked

RevenueBase identified 406 commercial construction consulting firms headquartered in Ireland as of September 2026 and tracks 9,630 professional contacts across them, including 4,162 with verified work emails and 517 with mobile numbers. Dublin is the largest hub.

This list covers commercial construction consulting firms 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 24, 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 24, 2026 86% judged on-target in blind review

406Companies

9,630Contacts tracked

4,162Verified emails

517Mobile numbers

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The 24 largest commercial construction consulting firms based in Ireland

Ranked by team size

Top 24 of 406 commercial construction consulting firms based in Ireland, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to commercial construction consulting firms: 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	John Paul Construction	Partial evidence	Dublin, IrelandHQ checked Sep 24, 2026	501-1,000	672 contacts →
	Partial 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 24, 2026
2	Collen Construction	Indirect evidence	Dublin 3, IrelandHQ checked Sep 24, 2026	201-500	421 contacts →
	Indirect evidence “Established in 1810 and trading as Collen Bros.” Source: RevenueBase Database · checked Sep 24, 2026
3	ORS	Partial evidence	Dublin, IrelandHQ checked Sep 24, 2026	51-200	270 contacts →
	Partial 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 24, 2026
4	Elliott Group	Partial evidence	Cavan, IrelandHQ checked Sep 24, 2026	201-500	239 contacts →
	Partial evidence “Construction has always been a pivotal part of the Elliott family.” Source: RevenueBase Database · checked Sep 24, 2026
5	KSN	Partial evidence	Dublin 4, IrelandHQ checked Sep 24, 2026	51-200	165 contacts →
	Partial evidence “KSN is an independent Irish owned construction consultancy founded over 35 years ago.” Source: RevenueBase Database · checked Sep 24, 2026
6	KSNPM	Indirect evidence	Dublin, IrelandHQ checked Sep 24, 2026	51-200	118 contacts →
	Indirect evidence “KSNPM is a trusted, multi-disciplinary, project management led building consultancy.” Source: RevenueBase Database · checked Sep 24, 2026
7	Stewart Construction	Partial evidence	Dublin City, IrelandHQ checked Sep 24, 2026	51-200	87 contacts →
	Partial 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 24, 2026
8	Ganson	Indirect evidence	Dublin, IrelandHQ checked Sep 24, 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 24, 2026
9	Barrett Mahony Consulting Engineers	Partial evidence	Dublin 2, IrelandHQ checked Sep 24, 2026	51-200	79 contacts →
	Partial evidence “Barrett Mahony Consulting Engineers is an established civil and structural engineering consultancy specialising in all aspects of civil and structural engineering and project…” Source: RevenueBase Database · checked Sep 24, 2026
10	Mitchell Mcdermott	Partial evidence	Dublin 4, IrelandHQ checked Sep 24, 2026	51-200	77 contacts →
	Partial evidence “Mitchell McDermott is an independent firm of Construction Consultants founded by Paul Mitchell and Anthony McDermott in 2015.” Source: RevenueBase Database · checked Sep 24, 2026
11	MCA Architects	Indirect evidence	Dublin, IrelandHQ checked Sep 24, 2026	51-200	72 contacts →
	Indirect evidence “MCA Architects and TTSP HWP have joined forces to form a fully integrated, pan-European leader in data centre design, engineering, and project delivery.” Source: RevenueBase Database · checked Sep 24, 2026
12	Tandem Project Management LTD	Partial evidence	Blackrock, IrelandHQ checked Sep 24, 2026	51-200	65 contacts →
	Partial evidence “Tandem is an engineering consultancy specialising in project management, multi-disciplined engineering design, construction management, energy & carbon reduction, EHS and talent…” Source: RevenueBase Database · checked Sep 24, 2026
13	Kilcawley Construction	Strong evidence	Sligo, IrelandHQ checked Sep 24, 2026	51-200	56 contacts →
	Strong evidence “Kilcawley Construction provide comprehensive construction services in a wide range of sectors including commercial, educational, pharmaceutical, healthcare, hospitality…” Source: RevenueBase Database · checked Sep 24, 2026
14	ABM Contractors LTD	Indirect evidence	Dublin, IrelandHQ checked Sep 24, 2026	51-200	56 contacts →
	Indirect evidence “Established in 1994, ABM has been providing Main Contractor Services to our clients in Ireland for over 30 years.” Source: RevenueBase Database · checked Sep 24, 2026
15	OCC Construction	Partial evidence	Headford Road, IrelandHQ checked Sep 24, 2026	51-200	56 contacts →
	Partial evidence “We provide a highly professional, motivated construction team which are dedicated to achieving the highest standards of quality.” Source: RevenueBase Database · checked Sep 24, 2026
16	Varming Consulting Engineers LTD	Partial evidence	Dundrum, IrelandHQ checked Sep 24, 2026	11-50	55 contacts →
	Partial evidence “At Varming, we’re all about cutting-edge design and meticulous oversight of mechanical and electrical services, whether it’s for brand-new constructions or revitalizing existing…” Source: RevenueBase Database · checked Sep 24, 2026
17	Rogerson Reddan	Partial evidence	Dublin 4, IrelandHQ checked Sep 24, 2026	11-50	53 contacts →
	Partial evidence “Rogerson Reddan (RR) is a multi-disciplinary consultancy practice serving the Construction Industry.” Source: RevenueBase Database · checked Sep 24, 2026
18	Garland	Partial evidence	Rathmines, IrelandHQ checked Sep 24, 2026	51-200	50 contacts →
	Partial evidence “GARLAND is an international consulting engineering firm.” Source: RevenueBase Database · checked Sep 24, 2026
19	Castlethorn	Strong evidence	Dundrum, IrelandHQ checked Sep 24, 2026	51-200	49 contacts →
	Strong evidence “Founded in 1991, Castlethorn Construction is one of Ireland’s most successful residential and commercial developers.” Source: RevenueBase Database · checked Sep 24, 2026
20	Monami Construction	Partial evidence	Galway, IrelandHQ checked Sep 24, 2026	51-200	49 contacts →
	Partial evidence “Monami Construction is a progressive general contracting company established to deliver quality construction projects on time and within budget.” Source: RevenueBase Database · checked Sep 24, 2026
21	Cogent Associates Ireland	Partial evidence	Dublin 2, IrelandHQ checked Sep 24, 2026	51-200	48 contacts →
	Partial evidence “Cogent Associates is an independent Irish Project Management and Cost Management consultancy, providing Quantity Surveying, Construction Consultancy and specialist property…” Source: RevenueBase Database · checked Sep 24, 2026
22	Mcelroy Associates	Partial evidence	Dublin 2, IrelandHQ checked Sep 24, 2026	11-50	45 contacts →
	Partial evidence “McElroy Associates carry out work in the Design, Project Management and Construction Supervision of building projects for international and Irish clients, primarily in the…” Source: RevenueBase Database · checked Sep 24, 2026
23	Mccauley Daye O'connell Architects	Partial evidence	Dublin, IrelandHQ checked Sep 24, 2026	11-50	45 contacts →
	Partial evidence “With invaluable architectural experience spanning over a range of sectors including commercial, offices, residential, leisure and retail we can confidently offer a large selection…” Source: RevenueBase Database · checked Sep 24, 2026
24	Bretland	Indirect evidence	Edenderry, IrelandHQ checked Sep 24, 2026	51-200	43 contacts →
	Indirect evidence “Bretland was founded in 1998 by visionary entrepreneur, Fechin Daly.” Source: RevenueBase Database · checked Sep 24, 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: commercial construction consulting firms. 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 commercial construction consulting firms.
Partial evidence: Its own public description names part of commercial construction consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name commercial construction consulting firms. 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 24 of 406 commercial construction consulting firms based in Ireland

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Commercial construction consulting firms based in Ireland at a glance

As of Sep 24, 2026

43.2%Verified-email coverage

5.4%Mobile-number coverage

23.7Average contacts per company

11-50Median size (employees)

20.0%Largest-city concentration · Dublin

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

201

11-50

159

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 26.0d

3,2120–30

89531–60

5361–90

090–180

2180+

Company record updated

Median 69.0d

00–30

2,79231–60

4,36661–90

1,92690–180

546180+

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 commercial construction consulting firms, 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 “commercial construction consulting firms”. 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 commercial construction consulting firms), 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 commercial construction consulting firms, 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, 4,162 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 24, 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.

Commercial construction consulting firms by metro

Commercial construction consulting firms in Dublin81

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 commercial construction consulting firms, 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 commercial construction consulting firms are there based in Ireland?

RevenueBase identified 406 commercial construction consulting firms 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?

John Paul Construction, headquartered in Dublin, tops this list with the largest team on record.

Which city has the most commercial construction consulting firms?

Dublin leads with 81 headquartered companies, followed by Cork (19) and Limerick (13).

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 4,162 verified decision-maker contacts tracked across these 406 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 24, 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.