Company lists · Data refreshed September 2026

Top 12 Residential energy efficiency companies based in Chicago, United States

Name: Residential energy efficiency companies based in Chicago, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 40 companies tracked

RevenueBase identified 40 company matches for residential energy efficiency companies associated with Chicago, United States as of September 2026 and tracks 270 professional contacts across them, including 78 with verified work emails. Across the United States, Houston is the largest hub for this category (72 companies); Chicago has 40.

This list covers company matches for residential energy efficiency companies associated with Chicago, 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 September 17, 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 Sep 17, 2026 How this list was built

40Companies

270Contacts tracked

78Verified emails

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The 12 largest residential energy efficiency companies based in Chicago, United States

Ranked by team size

Top 12 of 40 company matches for residential energy efficiency companies based in Chicago, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 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	Alpine Home AIR	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	51-200	68 contacts →
	Exact match “Founded in 2002, Alpine is a team of forward-thinking innovators working to provide intelligent heating and cooling solutions to homeowners in a way that:* Leads Americans away…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	National Retrofitting Group, LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	11-50	30 contacts →
	Exact match “National Retrofitting Group provides sustainability consulting along with a variety of energy retrofitting services to help our customers save money on their energy bills while…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Verde Energy Efficiency Experts	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	11-50	19 contacts →
	Exact match “Verde has a simple purpose - to save Chicago businesses and non profits energy and money.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	360 Energy Group	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	11-50	16 contacts →
	Exact match “360 Energy Group is an energy consulting firm that provides comprehensive energy solutions to the public and private sectors in the United States and worldwide, including energy…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Fresh Coast Solar	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	1-10	15 contacts →
	Exact match “We help Chicagoland's residents and businesses understand and reap the benefits of clean, affordable solar energy.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	ONE Energy Solutions, LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	51-200	14 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Option ONE Energy	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	11-50	7 contacts →
	Exact match “Option One Energy provides modern energy solutions for businesses of all sizes.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	RXSUN	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	1-10	6 contacts →
	Exact match “RxSun is a leading residential solar energy provider headquartered in Chicago, Illinois.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Lumen Global	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	1-10	3 contacts →
	Exact match “Lumen Global specializes in helping owners of commercial real estate save on their energy costs related to lighting.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	ALL Bright Solar	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	1-10	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	BIN Physics	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	1-10	1 contacts →
	Exact match “Our clients reduce their energy bills by 5-10% for low or NO cost!” BIN Physics is a leading mechanical engineering and energy efficiency firm, specializing in providing…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Light OWL Energy	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	1-10	1 contacts →
	Exact match “Welcome to Light Owl Energy, your solar panel contractor serving all of Illinois.” Recorded in the RevenueBase company graph · Sep 17, 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 “residential energy efficiency 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 12 of 40 residential energy efficiency companies based in Chicago, United States

See the full list, filter by size, metro and specialty, and access 78 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Residential energy efficiency companies based in Chicago, United States at a glance

As of Sep 17, 2026

28.9%Verified-email coverage

6.8Average contacts per company

1-10Median size (employees)

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for Chicago, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 40 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 Chicago, United States whose business descriptions match “residential energy efficiency 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 78 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 September 17, 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.

Residential energy efficiency companies by metro in the United States

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 “residential energy efficiency companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many residential energy efficiency companies are there based in Chicago, United States?

RevenueBase identified 40 company matches for residential energy efficiency companies associated with Chicago, United States as of September 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?

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

Which city in the United States has the most residential energy efficiency companies?

Houston leads the United States with 72 company records, followed by New York (69) and Austin (45). Chicago has 40.

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 78 professional contacts with verified work emails tracked across these 40 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 September 17, 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.