Company lists · Data refreshed October 2026

Top 20 Energy efficient building architects based in St. Louis, United States

Name: Energy efficient building architects based in St. Louis, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 12, 2026 31 companies tracked

RevenueBase identified 31 company matches for energy efficient building architects associated with St. Louis, United States as of October 2026 and tracks 1,537 professional contacts across them, including 830 with verified work emails. Across the United States, New York is the largest hub for this category (328 companies); St. Louis has 31.

This list covers company matches for energy efficient building architects associated with St. Louis, 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 12, 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 12, 2026 How this list was built

31Companies

1,537Contacts tracked

830Verified emails

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The 20 largest energy efficient building architects based in St. Louis, United States

Ranked by team size

Top 20 of 31 company matches for energy efficient building architects based in St. Louis, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 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	Introba	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	1,001-5,000	816 contacts →
	Exact match “Introba is one of the world’s largest building engineering and consulting firms with more than employees in offices across the United States, Canada, the United Kingdom, Serbia…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
2	KAI Enterprises	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	51-200	230 contacts →
	Exact match “Established in St.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
3	Mcclure Engineering-St. Louis MEP	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	51-200	137 contacts →
	Exact match “McClure Engineering is a Mechanical and Electrical Consulting Engineering firm dedicated to the development of innovative solutions for the unique engineering needs of our clients.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
4	Trivers	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	11-50	47 contacts →
	Exact match “Founded in 1975, Trivers is an architecture, planning, urban design, and interiors firm based in St.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
5	Solutions AEC	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	11-50	29 contacts →
	Exact match “Solutions AEC is a full-service Mechanical, Plumbing, Electrical Engineering and Commissioning design and construction company with offices in St.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
6	Christner Architects	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	51-200	25 contacts →
	Exact match “We explore fresh approaches to planning and design through services that include: Architecture, Interior Design, Landscape Architecture, Strategic Facility Planning, and Campus…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
7	Architectural Design Guild	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	11-50	22 contacts →
	Exact match “Architectural Design Guild was founded in 1981 as a multi-disciplinary firm providing architecture, engineering (mechanical, electrical, plumbing), and interior design.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
8	Chiodini Architects	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	11-50	16 contacts →
	Exact match “Chiodini Architects is a mid-size, highly respected Architectural firm founded as a corporation in St.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
9	Core10 Architecture	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	11-50	14 contacts →
	Exact match “In both office location and philosophy, CORE10 Architecture sits squarely at the crossroads of the urban core in the Central West End of St.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
10	Capital Consultants, INC	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	11-50	13 contacts →
	Exact match “Capital Consultants Inc.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
11	Facet Architectural Design	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	51-200	11 contacts →
	Exact match “Facet Architectural Design is a highly specialized architectural design firm featuring healthcare and educational facilities.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12	Owh, INC	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	11-50	8 contacts →
	Exact match “OWH is an Architectural firm providing planning, architectural, and interior design services with specialized expertise in healthcare, research, and entertainment project types.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13	United Excel Design	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	11-50	6 contacts →
	Exact match “United Excel Design provides architectural design & planning services centered on creating exceptional facilities to meet the design goals of our clients.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
14	Fsa, LLC	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	11-50	6 contacts →
	Exact match “FSA (Feeler S.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
15	Mitchell Wall Architecture And Design	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	1-10	4 contacts →
	Exact match “Mitchell Wall Architecture and Design has, for 40 years, provided high level architectural and design services to clientele.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16	Hwai Yang Architects	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	1-10	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17	Dennis Mcgrath Design, LLC	Exact match	St. Louis, United StatesHQ recorded Oct 12, 2026	1-10	2 contacts →
	Exact match “Dennis McGrath is founder and principal of Dennis McGrath Design, LLC, a design, and architectural consulting practice in Saint Louis, Missouri since 2015, and currently a Senior…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
18	L2e Solutions	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	1-10	2 contacts →
	Exact match “L2e is an MBE and SDVOSB firm that provides an innovative, progressive approach to architecture offering a full range of architectural services from initial concept to project…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
19	AD Arch	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	1-10	2 contacts →
	Exact match “AD:Arch is passionate about our city.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
20	Alkemeyer & Associates, LLC	Exact match	St. Louis, MO, United StatesHQ recorded Oct 12, 2026	1-10	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 12, 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 “energy efficient building architects”. 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 20 of 31 energy efficient building architects based in St. Louis, United States

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Energy efficient building architects based in St. Louis, United States at a glance

As of Oct 12, 2026

54.0%Verified-email coverage

49.6Average contacts per company

11-50Median size (employees)

Oct 12, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for St. Louis, so it is reported there. Company counts and contact totals on this page are exact for St. Louis, over 31 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 St. Louis, United States whose business descriptions match “energy efficient building architects” 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 830 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 12, 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.

Energy efficient building architects 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 “energy efficient building architects”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy efficient building architects are there based in St. Louis, United States?

RevenueBase identified 31 company matches for energy efficient building architects associated with St. Louis, 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?

Introba 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 energy efficient building architects?

New York leads the United States with 328 company records, followed by Los Angeles (121) and Chicago (108). St. Louis has 31.

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 830 professional contacts with verified work emails tracked across these 31 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 12, 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.