Company lists · Data refreshed September 2026

Top 25 Environmental design firms based in Houston, United States

Name: Environmental design firms based in Houston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 169 companies tracked

RevenueBase identified 169 company matches for environmental design firms associated with Houston, United States as of September 2026 and tracks 3,317 professional contacts across them, including 1,526 with verified work emails. Across the United States, New York is the largest hub for this category (553 companies); Houston has 169.

This list covers company matches for environmental design firms associated with Houston, 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 19, 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 19, 2026 How this list was built

169Companies

3,317Contacts tracked

1,526Verified emails

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The 25 largest environmental design firms based in Houston, United States

Ranked by team size

Top 25 of 169 company matches for environmental design firms based in Houston, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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	Estudio Architecture	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	n/a	390 contacts →
	Exact match “eStudio is a specialized full service architectural and boutique design firm.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	PGAL	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	201-500	312 contacts →
	Exact match “Founded in 1946, PGAL is a design firm specializing in architecture, engineering, interiors, and planning for a diverse portfolio of public and private sector clients.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	GSI Environmental INC	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	201-500	259 contacts →
	Exact match “GSI Environmental, Inc.(GSI), is an environmental engineering and science consulting firm committed to measuring, analyzing, and solving complex environmental problems around the…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Kirksey Architecture	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	201-500	252 contacts →
	Exact match “We are Kirksey, a Texas-based architecture firm, passionate about great architecture and all things sustainable.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	Shah Smith & Associates, INC	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	51-200	134 contacts →
	Exact match “Shah Smith & Associates, Inc.(SSA) is a 120+ employee Mechanical, Electrical, and Plumbing (MEP) consulting engineering firm with offices in Houston, Austin & Dallas.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	Powers Brown Architecture	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	51-200	124 contacts →
	Exact match “Powers Brown Architecture is a professional services firm practicing architecture, interior design, programming and urban design.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	OJB Landscape Architecture	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	51-200	124 contacts →
	Exact match “OJB Landscape Architecture focuses on creating landscapes that transform perspectives and evoke emotional responses, creating unique and unforgettable sensory experiences.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	GOREE	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	51-200	102 contacts →
	Exact match “Goree is a full-service architecture and design firm delivering solution-focused, performance-driven environments in a multitude of markets.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Rottet Studio	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	51-200	87 contacts →
	Exact match “Rottet Studio is widely regarded as one of the finest design practices in the world and was voted one of the Top 3 Most Admired Firms by a jury of peer professionals.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	PDR	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	51-200	78 contacts →
	Exact match “Through our design, architecture and consulting services, we have an unparalleled track record of solving for human experiences, and design challenges around the world.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Abel Design Group	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	11-50	67 contacts →
	Exact match “Founded in Houston, Texas in 2001, Abel Design Group (ADG) is an award-winning architecture and interior design firm specializing in corporate, hospitality, higher education…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	KW Landscape Architects	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	51-200	59 contacts →
	Exact match “KW Landscape Architects (KW) is a professional landscape architecture firm with offices in Austin, Houston, Indianapolis, and San Antonio.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	FKP Cannondesign	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	51-200	52 contacts →
	Exact match “Founded in 1937, FKP \| CannonDesign is one of the nation's largest specialty practices, focused on the planning and design of modern healthcare, higher education and research…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	Harrisonkornberg Architects	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	11-50	49 contacts →
	Exact match “Founded in 2003, HarrisonKornberg Architects provides a full range of high-quality architectural services to the Texas market and beyond.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	PDG Architects	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	11-50	46 contacts →
	Exact match “PDG Architects, based in Houston, Texas, is a full-service architectural firm recognized for quality performance.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	Energy Architecture, INC	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	11-50	44 contacts →
	Exact match “Energy Architecture is a specialized architecture firm based in Houston, serving clients at the forefront of innovation, research, and discovery.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Morris Architects A Huitt-Zollars Company	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	201-500	44 contacts →
	Exact match “With over 75 years of design expertise, Morris, a Huitt-Zollars Company, is an award-winning, full-service practice with locations in Houston, Orlando, Los Angeles, Fort Worth…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	EDI International, PC	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	51-200	41 contacts →
	Exact match “Established in 1976, EDI is a global architecture, interior design and planning firm specializing in commercial, leisure, hospitality, residential and planning projects.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	Asakura Robinson	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	11-50	36 contacts →
	Exact match “Asakura Robinson Company LLC is recognized as an outstanding Landscape Architecture firm most noted for design sensitivity, highly effective public engagement and as tireless…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Clark Condon	Exact match	Houston, United StatesHQ recorded Sep 19, 2026	11-50	34 contacts →
	Exact match “Clark Condon is a Houston-based Landscape Architecture firm specializing in the design of creative, interactive and meaningful outdoor environments for our clients and the…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	Identity Architects	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	11-50	34 contacts →
	Exact match “Founded in Houston, Identity Architecture is a commercial architecture firm specializing in master planning, architecture, interior design, and design-build options.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	UES Professional Solutions 64, LLC	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	11-50	31 contacts →
	Exact match “Environmental Consulting and Engineering InControl Technologies was established in 1997 to provide high-end quality environmental consulting services to owners of commercial and…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	B&d Contractors	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	51-200	29 contacts →
	Exact match “At B&D, it’s our job to Think Outside.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	English Associates Architects, INC	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	11-50	28 contacts →
	Exact match “English + Associates Architects is a full-service architectural and interior design firm specializing in high-performance, green-design solutions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	By Design Interiors, INC	Exact match	Houston, TX, United StatesHQ recorded Sep 19, 2026	11-50	27 contacts →
	Exact match “By Design Interiors is an award-winning design firm, founded in 1990.” Recorded in the RevenueBase company graph · Sep 19, 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 “environmental design firms”. 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 169 environmental design firms based in Houston, United States

See the full list, filter by size, metro and specialty, and access 1,526 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Environmental design firms based in Houston, United States at a glance

As of Sep 19, 2026

46.0%Verified-email coverage

19.6Average contacts per company

1-10Median size (employees)

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 169 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 Houston, United States whose business descriptions match “environmental design firms” 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 1,526 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 19, 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.

Environmental design firms 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 “environmental design firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many environmental design firms are there based in Houston, United States?

RevenueBase identified 169 company matches for environmental design firms associated with Houston, 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?

Estudio Architecture 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 environmental design firms?

New York leads the United States with 553 company records, followed by Los Angeles (272) and Chicago (205). Houston has 169.

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 1,526 professional contacts with verified work emails tracked across these 169 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 19, 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.