Company lists · Data refreshed September 2026

Top 18 Architecture firms based in Orange, United States

Name: Architecture firms based in Orange, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 27 companies tracked

RevenueBase identified 27 architecture firms headquartered in Orange, United States as of September 2026 and tracks 1,070 professional contacts across them, including 519 with verified work emails. New York is the largest hub.

This list covers architecture firms headquartered in Orange, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 6, 2026 86% judged on-target in blind review

27Companies

1,070Contacts tracked

519Verified emails

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The 18 largest architecture firms based in Orange, United States

Ranked by team size

Top 18 of 27 architecture firms based in Orange, United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to architecture firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	KDC Construction	Indirect evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	201-500	446 contacts →
	“Founded in 1996, KDC Construction offers commercial construction services in California and neighboring states.” Source: company website · checked Sep 6, 2026
2	AO	Strong evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	201-500	343 contacts →
	“Founded in 1974, AO is a full service Architectural, Master Planning and Design firm specializing in Retail, Residential and Mixed-Use projects.” Source: company website · checked Sep 6, 2026
3	VCA Structural	Indirect evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	51-200	57 contacts →
	“Offices in Orange, Oakland and Denver.” Source: company website · checked Sep 6, 2026
4	Spmdesign	Indirect evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	11-50	45 contacts →
	“Consistency, Thoroughness, Passion, Craftsmanship; these are the fundamentals on which we have built SPMDesign.” Source: company website · checked Sep 6, 2026
5	GDG Healthcare Architects Given Design Group	Strong evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	11-50	25 contacts →
	“GDG Healthcare Architects is a women-owned organization that provides full-service healthcare architecture and engineering throughout California.” Source: company website · checked Sep 6, 2026
6	B2r Consulting Group	Strong evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	11-50	18 contacts →
	“B2R provides a wide range of services including Architecture and Engineering (SB 326 Deck Inspections, SB 721 Deck Inspections, Design Services), Construction Consulting (Defect…” Source: company website · checked Sep 6, 2026
7	Jb3d Design. Build. Transform	Indirect evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	51-200	16 contacts →
	“Since 1988, JB3D has been a design-build firm in Southern California, managing both the design and construction phases of projects under a single contract with the project owner.” Source: company website · checked Sep 6, 2026
8	Prosper Architects	Strong evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	11-50	10 contacts →
	“Prosper Architects is an integrated commercial architecture firm built to solve real problems for developers, brands, and business owners.” Source: company website · checked Sep 6, 2026
9	Pencilbox Studios	Indirect evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	1-10	9 contacts →
	“Pencilbox Studios, a multi-disciplinary design firm located in California.” Source: company website · checked Sep 6, 2026
10	Side Studio	Strong evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	11-50	8 contacts →
	“ideas / design / architecture” Source: company website · checked Sep 6, 2026
11	JIG Consultants	Indirect evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	1-10	5 contacts →
	“JIG Consultants is a civil engineering firm providing consulting services to the public and private sectors.” Source: company website · checked Sep 6, 2026
12	DSE Architecture, INC	Indirect evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	1-10	3 contacts →
	Source: company website · checked Sep 6, 2026
13	Kinney Construction	Indirect evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	11-50	3 contacts →
	“Since 1980, Kinney Construction has operated on a simple premise: long-term success isn’t built on blueprints, but on the strength of our relationships.” Source: company website · checked Sep 6, 2026
14	Terrain Integration, INC	Strong evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	1-10	3 contacts →
	“Terrain Integration is a whole service landscape architectural firm with a passion for creating diverse and sustainable landscapes that evolve and flourish over time.” Source: company website · checked Sep 6, 2026
15	Dsea, INC Architecture Through Preservation, Adaptation & Innovation	Indirect evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	1-10	2 contacts →
	“Established in DSEA is committed to finding design solutions that respond to present goals and meet future needs through Preservation, Adaptation and Innovation.” Source: company website · checked Sep 6, 2026
16	Stratos Form	Strong evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	1-10	2 contacts →
	“Founded in 1998, Southern California based Stratos Form is a definitive, responsive architecture and design team creating thoughtfully and intelligently crafter, customized…” Source: company website · checked Sep 6, 2026
17	Gregg Maedo Associates, INC	Strong evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	11-50	1 contacts →
	“GM+A is a unique Architectural Firm that is passionate, economically responsible and committed to serving the healthcare and senior care markets by providing superior quality and…” Source: company website · checked Sep 6, 2026
18	Defi Construction, INC	Indirect evidence	Orange, CA, United StatesHQ checked Sep 6, 2026	1-10	1 contacts →
	“Build With DEFI: Design.” Source: company website · checked Sep 6, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: architecture firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names architecture firms.
Partial evidence: Its own public description names part of architecture firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name architecture firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 18 of 27 architecture firms based in Orange, United States

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Architecture firms based in Orange, United States at a glance

As of Sep 6, 2026

48.5%Verified-email coverage

39.6Average contacts per company

11-50Median size (employees)

9159.3%Largest-city concentration · New York

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Orange, over 27 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among architecture firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Orange, United States whose own description of what they do matches “architecture firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names architecture firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among architecture firms, and records with no verified work email. Companies headquartered outside Orange are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 519 across the full list. 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 6, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Architecture firms by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names architecture firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many architecture firms are there based in Orange, United States?

RevenueBase identified 27 architecture firms headquartered in Orange, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

KDC Construction, headquartered in Orange, tops this list with the largest team on record.

Which city has the most architecture firms?

New York leads with 2473 headquartered companies, followed by Los Angeles (1046) and Chicago (781).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 519 verified decision-maker contacts tracked across these 27 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 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 Smart Search, 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.