Company lists · Data refreshed October 2026

Top 25 Building retrofitting companies based in the United States

Name: Building retrofitting companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 9, 2026 1,300 companies tracked

RevenueBase identified 1,300 company matches for building retrofitting companies associated with the United States as of October 2026 and tracks 15,687 professional contacts across them, including 5,293 with verified work emails. New York is the largest hub.

This list covers company matches for building retrofitting companies associated with the United States, 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 October 9, 2026.

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 Oct 9, 2026 How this list was built

1,300Companies

15,687Contacts tracked

5,293Verified emails

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The 25 largest building retrofitting companies based in the United States

Ranked by team size

Top 25 of 1,300 company matches for building retrofitting companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 9, 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	Truteam	Exact match	Daytona Beach, FL, United StatesHQ recorded Oct 9, 2026	10001+	1,567 contacts →
	Exact match “TruTeam is the nation’s largest insulation installer and we also install fireplaces, gutters, garage doors and more.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
2	Climatec, LLC	Exact match	Phoenix, AZ, United StatesHQ recorded Oct 9, 2026	1,001-5,000	666 contacts →
	Exact match “Climatec has been making buildings safer, more comfortable and efficient for over 40 years.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
3	Sitelogiq	Exact match	Minneapolis, MN, United StatesHQ recorded Oct 9, 2026	501-1,000	491 contacts →
	Exact match “SitelogIQ provides design, engineering, and construction management services that help organizations nationwide modernize their facilities and infrastructure.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
4	Noresco	Exact match	Westborough, MA, United StatesHQ recorded Oct 9, 2026	201-500	479 contacts →
	Exact match “NORESCO, an OPTERRA company, helps customers modernize aging building systems and upgrade energy and water infrastructure to meet evolving demands.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
5	Homeworks Energy, INC	Exact match	Medford, MA, United StatesHQ recorded Oct 9, 2026	201-500	369 contacts →
	Exact match “At HomeWorks Energy, our mission is simple, literally: Energy Efficiency, Simplified.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
6	Allana Buick & Bers, INC	Exact match	Palo Alto, CA, United StatesHQ recorded Oct 9, 2026	201-500	245 contacts →
	Exact match “Allana Buick & Bers, Inc.(ABB) is a leading Architectural Engineering firm specializing in making buildings perform better by making them energy efficient and longer lasting with…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
7	Reliable Heating & AIR	Exact match	Kennesaw, GA, United StatesHQ recorded Oct 9, 2026	201-500	236 contacts →
	Exact match “Since 1978, Reliable Heating & Air has been serving all of Metro Atlanta's communities offering heating, cooling, plumbing and electrical services, indoor air quality, duct…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
8	Tolin Mechanical Systems	Exact match	Denver, CO, United StatesHQ recorded Oct 9, 2026	201-500	228 contacts →
	Exact match “Tolin Mechanical is a Leading Energy & Commercial HVAC Services Company.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
9	Dalkia Energy Solutions	Exact match	Beverly, MA, United StatesHQ recorded Oct 9, 2026	201-500	213 contacts →
	Exact match “Dalkia Energy Solutions, a subsidiary of the EDF (Électricité de France) Group, is a national leader in energy efficiency and sustainability for commercial, industrial, and…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
10	Haynes Mechanical Systems	Exact match	Greenwood Village, CO, United StatesHQ recorded Oct 9, 2026	201-500	203 contacts →
	Exact match “Haynes Mechanical Systems has been keeping commercial buildings running strong since 1968.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
11	Marshalls INC	Exact match	Lynnwood, WA, United StatesHQ recorded Oct 9, 2026	n/a	179 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
12	Mcclure Company	Exact match	Harrisburg, PA, United StatesHQ recorded Oct 9, 2026	201-500	177 contacts →
	Exact match “Headquartered in Harrisburg, Pennsylvania, McClure Company is one of the mid-Atlantic's largest, fully integrated mechanical construction, engineering, maintenance and energy…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
13	Hill York	Exact match	Dania Beach, FL, United StatesHQ recorded Oct 9, 2026	201-500	168 contacts →
	Exact match “Hill York is a full service contractor that offers a full array of energy efficient air-conditioning services from concept to completion, maintenance to repair and everything in…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14	GSM Services	Exact match	Gastonia, NC, United StatesHQ recorded Oct 9, 2026	201-500	163 contacts →
	Exact match “For nearly a century, GSM Services has built its reputation on reliability, honesty, expert service, and high-quality workmanship.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15	USA Insulation	Exact match	Cleveland, OH, United StatesHQ recorded Oct 9, 2026	51-200	160 contacts →
	Exact match “Established in 1977 and incorporated in 1985, USA Insulation has saved thousands of customers millions of dollars on their heating and air conditioning bills.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16	Quality First Home Improvement, INC	Exact match	Citrus Heights, CA, United StatesHQ recorded Oct 9, 2026	201-500	155 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17	Legence	Exact match	San Jose, CA, United StatesHQ recorded Oct 9, 2026	10001+	152 contacts →
	Exact match “We are a leading provider of engineering, consulting, installation and maintenance services for mission-critical systems in buildings.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18	Steven Winter Associates	Exact match	Norwalk, CT, United StatesHQ recorded Oct 9, 2026	51-200	144 contacts →
	Exact match “For over five decades, we’ve been at the forefront of transforming the built environment to be more energy efficient, accessible, healthy, and resilient.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19	Melink Corporation	Exact match	Milford, OH, United StatesHQ recorded Oct 9, 2026	51-200	131 contacts →
	Exact match “We are a global provider of energy efficiency solutions for commercial buildings with five business offerings: HVAC Testing, Adjusting & Balancing, Intelli-Hood® Kitchen…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
20	Willdan Performance Engineering	Exact match	Denver, KS, United StatesHQ recorded Oct 9, 2026	51-200	128 contacts →
	Exact match “Willdan Performance Engineering specializes in energy and infrastructure improvement projects through design-build and performance contracting.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
21	PSD	Exact match	Ithaca, NY, United StatesHQ recorded Oct 9, 2026	51-200	117 contacts →
	Exact match “PSD is an energy efficiency services and technology company.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
22	Midwest Mechanical Commercial, Industrial Hvac Mechanical Services	Exact match	Lombard, IL, United StatesHQ recorded Oct 9, 2026	51-200	114 contacts →
	Exact match “Chicago's Facilities Management Company Midwest Mechanical is a commercial HVAC services and facility management company focused on energy efficiency for building owners and…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
23	Chaparral Company	Exact match	Waco, TX, United StatesHQ recorded Oct 9, 2026	1,001-5,000	107 contacts →
	Exact match “Chaparral Insulation has proudly served the mechanical insulation industry for more than 30 years.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
24	Blocpower	Exact match	Brooklyn, United StatesHQ recorded Oct 9, 2026	51-200	107 contacts →
	Exact match “BlocPower is upgrading America’s buildings to be smarter, greener and healthier for all-fighting the climate crisis and creating good green jobs.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
25	Koala Insulation	Exact match	Melbourne, FL, United StatesHQ recorded Oct 9, 2026	11-50	102 contacts →
	Exact match “Our mission is to deliver efficiency and improve comfort by addressing customer priorities, with expertise and simplicity, for an ultimately painless process.” Recorded in the RevenueBase company graph · Oct 9, 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 retrofitting companies”. 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 1,300 building retrofitting companies based in the United States

See the full list, filter by size, metro and specialty, and access 5,293 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Building retrofitting companies based in the United States at a glance

As of Oct 9, 2026

33.7%Verified-email coverage

12.1Average contacts per company

11-50Median size (employees)

2.5%Largest-city concentration · New York

Oct 9, 2026Page data refreshed

Companies by employee count

1-10

623

11-50

489

51-200

136

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,300 companies.

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.
What qualifies: Company records associated with the United States whose business descriptions match “building retrofitting companies” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 5,293 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 October 9, 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 retrofitting companies by metro

Building retrofitting companies in New York32

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 retrofitting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many building retrofitting companies are there based in the United States?

RevenueBase identified 1,300 company matches for building retrofitting companies associated with the United States as of October 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?

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

Which city has the most building retrofitting companies?

New York leads with 32 company records, followed by Houston (19) and Atlanta (17).

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 5,293 professional contacts with verified work emails tracked across these 1,300 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 October 9, 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.