Company lists · Data refreshed November 2026

Top 25 Building systems contractors worldwide

Name: Building systems contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 44,098 companies tracked

RevenueBase identified 44,098 company matches for building systems contractors worldwide as of November 2026 and tracks 596,710 professional contacts across them, including 170,919 with verified work emails. The United States is the largest market and Dubai the largest hub.

This list covers company matches for building systems contractors worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026. Country and city lists for building systems contractors follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 SmartSearch · Exact Recorded Nov 6, 2026 How this list was built

44,098Companies

596,710Contacts tracked

170,919Verified emails

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The 25 largest building systems contractors worldwide

Ranked by team size

Top 25 of 44,098 company matches for building systems contractors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Equans	Exact match	Courbevoie, FranceHQ recorded Nov 6, 2026	10001+	5,803 contacts →
	Exact match “Equans, a Bouygues group company, is a world leader in multi-technical services with offices in 20 country hubs.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Equans Belux	Exact match	Brussels, BelgiumHQ recorded Nov 6, 2026	5,001-10,000	5,429 contacts →
	Exact match “What if you could use your talent to contribute to the great challenges of tomorrow?” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Caverion	Exact match	Vantaa, FinlandHQ recorded Nov 6, 2026	10001+	4,697 contacts →
	Exact match “About Caverion Caverion is an expert for smart and sustainable built environments, enabling performance and people’s well-being.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Gilbane Building	Exact match	Providence, RI, United StatesHQ recorded Nov 6, 2026	1,001-5,000	4,383 contacts →
	Exact match “Gilbane Building Company provides a full slate of construction and facilities-related services-from preconstruction services planning and integrated consulting capabilities to…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Southland Industries	Exact match	Garden Grove, MD, United StatesHQ recorded Nov 6, 2026	10001+	3,122 contacts →
	Exact match “As one of the nation's largest building systems experts, Southland Industries provides innovative, practical results for your engineering, construction, service, and energy needs.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Tyco Simplexgrinnell	Exact match	Cork, IrelandHQ recorded Nov 6, 2026	10001+	2,971 contacts →
	Exact match “Tyco is now Johnson Controls, the world leader in fire protection, security, HVAC, building controls and energy storage.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Black & Mcdonald Limited	Exact match	Toronto, ON, CanadaHQ recorded Nov 6, 2026	5,001-10,000	2,891 contacts →
	Exact match “Black & McDonald is an integrated, multi-trade service provider that safely delivers high-quality construction, facilities management, and technical solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Cleaning Services Group	Exact match	Danvers, MA, United StatesHQ recorded Nov 6, 2026	n/a	2,743 contacts →
	Exact match “Cleaning Services Group, Inc.(CSG) is a multi-faceted, national building services company dedicated to providing our clients with cost effective cleaning and maintenance solutions…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Acco Engineered Systems	Exact match	Pasadena, CA, United StatesHQ recorded Nov 6, 2026	5,001-10,000	2,633 contacts →
	Exact match “Since 1934, owners and builders have selected ACCO Engineered Systems to design, install, and maintain more than mechanical projects.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Hitt Contracting INC	Exact match	Falls Church, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,603 contacts →
	Exact match “HITT Contracting provides a wide range of construction services across the nation, from complex core and shell buildings and renovations to interior fit-outs and routine service…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	GCA Services Group	Exact match	NY, United StatesHQ recorded Nov 6, 2026	10001+	2,546 contacts →
	Exact match “ABM (NYSE: ABM) is a Fortune 500 company and leading provider of facility solutions with offices throughout the United States and various international locations.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Araujo Abreu Engenharia	Exact match	Rio De Janeiro, BrazilHQ recorded Nov 6, 2026	1,001-5,000	2,017 contacts →
	Exact match “A Araujo Abreu foi fundada em 1922.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	American Residential Services	Exact match	Memphis, NC, United StatesHQ recorded Nov 6, 2026	5,001-10,000	2,013 contacts →
	Exact match “American Residential Services (ARS®/Rescue Rooter®) is one of the nation’s largest providers of heating, air conditioning, indoor air quality, plumbing, drain cleaning…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Tdindustries, INC	Exact match	Dallas, AZ, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,002 contacts →
	Exact match “TDIndustries delivers a comprehensive approach to Facility Services and Mechanical Construction.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	IMC Saste Construções, Serviços E Comércio Ltda	Exact match	Sao Paulo, BrazilHQ recorded Nov 6, 2026	1,001-5,000	1,846 contacts →
	Exact match “A IMC Saste, empresa fundada em 1992, tem atuação de abrangência nacional e unidades de negócio especializadas nas áreas de Facilities, Construção e Montagem, Manutenção…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Modern Niagara	Exact match	Kanata, ON, CanadaHQ recorded Nov 6, 2026	1,001-5,000	1,642 contacts →
	Exact match “We build for life.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	ISG	Exact match	London, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	1,637 contacts →
	Exact match “Who we are: At ISG, our vision is to be the world’s most dynamic construction services company, delivering places that help people and businesses thrive.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Service Experts	Exact match	Richardson, NY, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,552 contacts →
	Exact match “Service Experts is North America's leading HVAC, Plumbing & Electrical company with 75+ locations nationwide.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Emcor Group, INC	Exact match	Norwalk, CT, United StatesHQ recorded Nov 6, 2026	10001+	1,493 contacts →
	Exact match “A Fortune 500® company and a member of the S&P 500, EMCOR Group, Inc.(NYSE: EME) is a leader in mechanical and electrical construction, industrial and energy infrastructure, and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Ainsworth INC	Exact match	Toronto, QC, CanadaHQ recorded Nov 6, 2026	1,001-5,000	1,464 contacts →
	Exact match “Our customers depend on their buildings, industrial assets, processes, and energy management, to help them meet competitive challenges.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Macdonald-Miller Facility Solutions	Exact match	Seatac, WA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,424 contacts →
	Exact match “MacDonald-Miller Facility Solutions is a full-service, design-build mechanical contractor in the Pacific Northwest.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Comfort Systems USA	Exact match	Houston, IN, United StatesHQ recorded Nov 6, 2026	10001+	1,407 contacts →
	Exact match “Comfort Systems USA \| Quality People.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Bravida Danmark A S	Exact match	Brøndby, DenmarkHQ recorded Nov 6, 2026	1,001-5,000	1,385 contacts →
	Exact match “Bravida Danmark er blandt landets største tekniske installations- og servicevirksomheder med over medarbejdere i byer landet over, og vi er en arbejdsplads, der har plads til alle.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	MJ Quinn	Exact match	Prescot, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	1,373 contacts →
	Exact match “At MJ Quinn we believe in creating great connections, with our customers, our people and our world.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Facility Solutions Group	Exact match	Austin, KS, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,345 contacts →
	Exact match “Big jobs, complex systems, tight timelines.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “building systems contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 44,098 building systems contractors worldwide

See the full list, filter by size, metro and specialty, and access 170,919 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Building systems contractors worldwide at a glance

As of Nov 6, 2026

28.6%Verified-email coverage

13.5Average contacts per company

11-50Median size (employees)

1.0%Largest-city concentration · Dubai

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

17,579

11-50

17,069

51-200

6,123

201-500

1,384

501-1,000

400

1,001-5,000

322

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for building systems contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “building systems contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 170,919 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Building systems contractors by location

164 lists · largest first

Every Building systems contractors list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “building systems contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many building systems contractors are there worldwide?

RevenueBase identified 44,098 company matches for building systems contractors worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Equans tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most building systems contractors?

The United States leads with 13,163 companies, followed by the United Kingdom (3,453) and Italy (2,621). Every building systems contractors list by country and city is linked on this page.

Which city has the most building systems contractors?

Dubai leads with 440 company records, followed by London (418) and Sao Paulo (399).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 170,919 professional contacts with verified work emails tracked across these 44,098 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.