Company lists · Data refreshed August 2026

Top 25 Construction consulting firms based in Ireland

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

Compiled by the RevenueBase Data Team Data refreshed Aug 31, 2026 217 companies tracked

RevenueBase identified 217 construction consulting firms headquartered in Ireland as of August 2026 and tracks 3,901 professional contacts across them, including 1,833 with verified work emails and 166 with mobile numbers. Dublin is the largest hub.

This list covers 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 August 31, 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 RevenueBase Smart Search rating on every row Refreshed Aug 31, 2026 86% judged on-target in blind review

217Companies

3,901Contacts tracked

1,833Verified emails

166Mobile numbers

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The 25 largest construction consulting firms based in Ireland

Ranked by team size

Top 25 of 217 construction consulting firms based in Ireland, ranked by team size, largest first. Data refreshed Aug 31, 2026. RevenueBase Smart Search rates how each company's information relates to 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	Oranmore Galway, Ireland	501-1,000	694 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 Aug 31, 2026
2	Collen Construction	Indirect evidence	Ireland	201-500	418 contacts →
	Indirect evidence “Established in 1810 and trading as Collen Bros.” Source: RevenueBase Database · checked Aug 31, 2026
3	ORS	Partial evidence	Ireland	51-200	267 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 Aug 31, 2026
4	KSN	Partial evidence	Dublin, Ireland	51-200	165 contacts →
	Partial evidence “KSN is an independent Irish owned construction consultancy founded over 35 years ago.” Source: RevenueBase Database · checked Aug 31, 2026
5	ROSS	Partial evidence	Athlone, Ireland	51-200	82 contacts →
	Partial evidence “ROSS delivers specialist engineering & construction services with a focus on high-tech facilities, pharmaceutical projects, and housing developments.” Source: RevenueBase Database · checked Aug 31, 2026
6	Barrett Mahony Consulting Engineers	Partial evidence	Ireland	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 Aug 31, 2026
7	Mitchell Mcdermott	Partial evidence	Dublin, Ireland	51-200	75 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 Aug 31, 2026
8	Varming Consulting Engineers LTD	Partial evidence	Roscommon, Ireland	11-50	57 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 Aug 31, 2026
9	Kilcawley Construction	Partial evidence	Maynooth, Ireland	51-200	56 contacts →
	Partial evidence “Kilcawley Construction provide comprehensive construction services in a wide range of sectors including commercial, educational, pharmaceutical, healthcare, hospitality…” Source: RevenueBase Database · checked Aug 31, 2026
10	ECC Group	Partial evidence	Clontarf, Ireland	51-200	54 contacts →
	Partial evidence “ECC Design & Engineering Limited is a leading consultancy specializing in Construction management, Project Management, Design Management, OFCI QA/QC, Site engineering, Setting…” Source: RevenueBase Database · checked Aug 31, 2026
11	Monami Construction	Partial evidence	Ireland	51-200	53 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 Aug 31, 2026
12	Rogerson Reddan	Partial evidence	Dublin, Ireland	11-50	52 contacts →
	Partial evidence “Rogerson Reddan (RR) is a multi-disciplinary consultancy practice serving the Construction Industry.” Source: RevenueBase Database · checked Aug 31, 2026
13	Cogent Associates Ireland	Indirect evidence	Ireland	51-200	48 contacts →
	Indirect evidence “Cogent Associates are an independent project and cost management consultancy, providing a comprehensive range of specialist property related services, across all sectors, spanning…” Source: RevenueBase Database · checked Aug 31, 2026
14	Mcelroy Associates	Partial evidence	Dublin, Ireland	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 Aug 31, 2026
15	Kpmg Construction Advisory	Partial evidence	Ireland	51-200	40 contacts →
	Partial evidence “KPMG Construction Advisory is a leading provider of construction project management, cost consultancy, project controls and mechanical & electrical cost management services.” Source: RevenueBase Database · checked Aug 31, 2026
16	MMP	Partial evidence	Rathquarter, Ireland	11-50	36 contacts →
	Partial evidence “MMP (Mulcahy McDonagh & Partners) is one of Ireland’s most established construction consultancies, providing Quantity Surveying, Project Management, and Funder Advisory services…” Source: RevenueBase Database · checked Aug 31, 2026
17	Carey Building Contractors	Indirect evidence	Ireland	51-200	32 contacts →
	Indirect evidence “Established in 1998, by Paul Carey, Carey Building Contractors are based in Liosban Business Park, Tuam Road, Galway.” Source: RevenueBase Database · checked Aug 31, 2026
18	WH Stephens	Indirect evidence	Ireland	51-200	28 contacts →
	Indirect evidence “WHS is a company formed in 1865, providing an unbroken record of high quality service for over 150 years.” Source: RevenueBase Database · checked Aug 31, 2026
19	TBD Consultants	Partial evidence	Greystones, Ireland	11-50	27 contacts →
	Partial evidence “Established in 2005, TBD Consultants is dedicated to the provision of excellence in construction cost management services to owners and their professional consultants.” Source: RevenueBase Database · checked Aug 31, 2026
20	Clandillon Civil Consulting LTD	Indirect evidence	Newbridge, Ireland	11-50	24 contacts →
	Indirect evidence “is a civil engineering consultancy, which is dedicated to providing exceptional service to main Contractors in the execution of civil engineering projects.” Source: RevenueBase Database · checked Aug 31, 2026
21	Cora Consulting Engineers	Indirect evidence	Dublin, Ireland	11-50	23 contacts →
	Indirect evidence “Structural Engineering Consultancy engaged in the design of specialist contempary Architectural Structures.” Source: RevenueBase Database · checked Aug 31, 2026
22	DJF Engineering Services LTD	Partial evidence	Ireland	11-50	23 contacts →
	Partial evidence “PROJECT MANANGERS & CONSULTING ENGINEERS Project Execution, from Concept to Completion ~ WHAT WE DO ~ Our practice has maintained a reputation for high quality Project Management…” Source: RevenueBase Database · checked Aug 31, 2026
23	OMC	Indirect evidence	Galway, Ireland	11-50	22 contacts →
	Indirect evidence “OMC Group, we provide a seamless, multidisciplinary consultancy service, specialising in engineering, design, and compliance solutions for commercial projects.” Source: RevenueBase Database · checked Aug 31, 2026
24	Downes Associates	Indirect evidence	Dublin, Ireland	11-50	21 contacts →
	Indirect evidence “Downes Associates is a Structural and Civil Engineering Consultancy specialising in the delivery of quality civil and structural design solutions.” Source: RevenueBase Database · checked Aug 31, 2026
25	Lohan & Donnelly Consulting Engineers	Partial evidence	Ireland	11-50	21 contacts →
	Partial evidence “Lohan & Donnelly Consulting Engineers Established in 1991, Lohan & Donnelly Ltd.” Source: RevenueBase Database · checked Aug 31, 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 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 construction consulting firms.
Partial evidence: Its own public description names part of 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 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 25 of 217 construction consulting firms based in Ireland

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Construction consulting firms based in Ireland at a glance

As of Aug 31, 2026

47.0%Verified-email coverage

4.3%Mobile-number coverage

18.0Average contacts per company

1-10Median size (employees)

16.6%Largest-city concentration · Dublin

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

109

11-50

51-200

201-500

501-1,000

1,001-5,000

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 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 “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 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 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, 1,833 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 August 31, 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 consulting firms by metro

Construction consulting firms in Dublin36

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 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 construction consulting firms are there based in Ireland?

RevenueBase identified 217 construction consulting firms headquartered in Ireland as of August 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 Oranmore Galway, tops this list with the largest team on record.

Which city has the most construction consulting firms?

Dublin leads with 36 headquartered companies, followed by Limerick (9) and Cork (8).

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 1,833 verified decision-maker contacts tracked across these 217 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 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.