Company lists · Data refreshed September 2026

Top 25 Portable office manufacturers based in the United States

Name: Portable office manufacturers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 312 companies tracked

RevenueBase identified 312 portable office manufacturers headquartered in the United States as of September 2026 and tracks 7,800 professional contacts across them, including 2,393 with verified work emails. Houston is the largest hub.

This list covers portable office manufacturers headquartered in the 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 30, 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 30, 2026 86% judged on-target in blind review

312Companies

7,800Contacts tracked

2,393Verified emails

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The 25 largest portable office manufacturers based in the United States

Ranked by team size

Top 25 of 312 portable office manufacturers based in the United States, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to portable office manufacturers: 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	Mobile Mini Solutions	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 30, 2026	1,001-5,000	1,355 contacts →
	Indirect evidence “Mobile Mini is now WillScot.” Source: RevenueBase Database · checked Sep 30, 2026
2	Mobile Modular Management Corporation	Indirect evidence	Livermore, CA, United StatesHQ checked Sep 30, 2026	501-1,000	305 contacts →
	Indirect evidence “At Mobile Modular, a division of McGrath RentCorp, we recognize the importance of finding not just a job, but a meaningful career.” Source: RevenueBase Database · checked Sep 30, 2026
3	Modspace	Indirect evidence	Berwyn, PA, United StatesHQ checked Sep 30, 2026	501-1,000	293 contacts →
	Indirect evidence “Building on 50 years of experience in the modular construction industry, ModSpace is the American-owned market leader in time-tested product quality; new, innovative modular…” Source: RevenueBase Database · checked Sep 30, 2026
4	Volumetric Building Companies	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 30, 2026	501-1,000	189 contacts →
	Indirect evidence “Volumetric Building Companies (VBC) is a vertically integrated global volumetric modular construction technology leader headquartered in Philadelphia, PA with locations across the…” Source: RevenueBase Database · checked Sep 30, 2026
5	Pac-Van, INC	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 30, 2026	201-500	160 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
6	Pacific Mobile Structures, INC	Partial evidence	Chehalis, WA, United StatesHQ checked Sep 30, 2026	201-500	158 contacts →
	Partial evidence “Pacific Mobile Structures sells and leases exceptional mobile office space and builds innovative modular structures with a relentless, customer-first commitment.” Source: RevenueBase Database · checked Sep 30, 2026
7	Filmwerks	Indirect evidence	Rocky Point, NC, United StatesHQ checked Sep 30, 2026	51-200	110 contacts →
	Indirect evidence “Through our expertly designed, fabricated, and installed custom and modular structures, Filmwerks is dedicated to bringing your broadcast and experiential concepts to life.” Source: RevenueBase Database · checked Sep 30, 2026
8	Mobile Modular Portable Storage	Partial evidence	Livermore, CA, United StatesHQ checked Sep 30, 2026	51-200	105 contacts →
	Partial evidence “At Mobile Modular Portable Storage, a division of McGrath RentCorp, we understand it’s important to find the right job and the right career.” Source: RevenueBase Database · checked Sep 30, 2026
9	Aries Buildings	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	51-200	105 contacts →
	Indirect evidence “A nationwide modular construction partner specializing in temporary and permanent space solutions.” Source: RevenueBase Database · checked Sep 30, 2026
10	Silver Creek Modular	Indirect evidence	Perris, CA, United StatesHQ checked Sep 30, 2026	201-500	95 contacts →
	Indirect evidence “Silver Creek Modular: Purpose-Build, People Powered.” Source: RevenueBase Database · checked Sep 30, 2026
11	Alaska Structures	Partial evidence	Las Cruces, NM, United StatesHQ checked Sep 30, 2026	201-500	78 contacts →
	Partial evidence “Alaska Structures® designs and manufactures engineered fabric buildings, industrial facilities, and workforce accommodations for some of the world's most challenging environments.” Source: RevenueBase Database · checked Sep 30, 2026
12	Cook Portable Warehouses	Strong evidence	Cobden, IL, United StatesHQ checked Sep 30, 2026	201-500	75 contacts →
	Strong evidence “In 1984, the Cook family began constructing portable buildings on a parking lot next to their office with the goal of getting rid of some excess lumber.” Source: RevenueBase Database · checked Sep 30, 2026
13	Whitley Manufacturing	Partial evidence	South Whitley, IN, United StatesHQ checked Sep 30, 2026	51-200	72 contacts →
	Partial evidence “Whitley Manufacturing is one of the nation's leading manufacturers of custom commercial modular buildings serving an international clientele from Indiana and Washington.” Source: RevenueBase Database · checked Sep 30, 2026
14	Boxx Modular United States	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 30, 2026	201-500	59 contacts →
	Indirect evidence “BOXX Modular US rents, leases, and sells temporary and permanent modular buildings, including standard buildings ready for immediate delivery and custom-designed solutions.” Source: RevenueBase Database · checked Sep 30, 2026
15	Falcon Structures	Partial evidence	Manor, TX, United StatesHQ checked Sep 30, 2026	51-200	57 contacts →
	Partial evidence “Founded in 2003, Falcon Structures repurposes steel shipping containers into safe and secure living, working and storage spaces - workforce housing units, mobile offices, and more.” Source: RevenueBase Database · checked Sep 30, 2026
16	Portable Solutions Group, INC	Partial evidence	Greenup, KY, United StatesHQ checked Sep 30, 2026	51-200	56 contacts →
	Partial evidence “Portable Solutions Group (PSG), Powered by VitalSpace, is a leader in designing and manufacturing containerized structures and purpose-built enclosures that enhance productivity…” Source: RevenueBase Database · checked Sep 30, 2026
17	Madison Industries, INC	Indirect evidence	Cerritos, CA, United StatesHQ checked Sep 30, 2026	51-200	53 contacts →
	Indirect evidence “At Madison Industries, we understand our customers’ needs and expectations are constantly evolving.” Source: RevenueBase Database · checked Sep 30, 2026
18	Triumph Modular	Partial evidence	Littleton, MA, United StatesHQ checked Sep 30, 2026	51-200	52 contacts →
	Partial evidence “Triumph Modular is a leader in the Northeast Region for leasing mobile offices, modular buildings, and storage containers.” Source: RevenueBase Database · checked Sep 30, 2026
19	Porta-King Building Systems	Partial evidence	Earth City, MO, United StatesHQ checked Sep 30, 2026	51-200	52 contacts →
	Partial evidence “Porta-King is the largest manufacturer of pre-engineered buildings used in the Industrial, Commercial, Security and Petroleum markets.” Source: RevenueBase Database · checked Sep 30, 2026
20	MY Mini Casa	Indirect evidence	Draper, UT, United StatesHQ checked Sep 30, 2026	501-1,000	51 contacts →
	Indirect evidence “We are a container supply company that specializes in unique industry solutions.” Source: RevenueBase Database · checked Sep 30, 2026
21	Allied Modular Building Systems	Indirect evidence	Orange, CA, United StatesHQ checked Sep 30, 2026	51-200	50 contacts →
	Indirect evidence “Allied Modular has been an industry leader for over 35 years in high quality modular construction.” Source: RevenueBase Database · checked Sep 30, 2026
22	Acton Mobile	Indirect evidence	Baltimore, MD, United StatesHQ checked Sep 30, 2026	201-500	49 contacts →
	Indirect evidence “No one knows how mobile facilities and temporary storage enhance productivity and results like Acton Mobile.” Source: RevenueBase Database · checked Sep 30, 2026
23	Palomar Modular Buildings	Partial evidence	Desoto, TX, United StatesHQ checked Sep 30, 2026	51-200	46 contacts →
	Partial evidence “Palomar Modular Buildings designs and manufactures advanced modular buildings for a range of industries both public and private.” Source: RevenueBase Database · checked Sep 30, 2026
24	Wilmot Modular Structures, INC	Partial evidence	White Marsh, MD, United StatesHQ checked Sep 30, 2026	51-200	45 contacts →
	Partial evidence “Since 1989, Wilmot Modular Structures has proudly maintained its position as an industry leader in the distribution, sales, and leasing of portable, prefabricated, and mobile…” Source: RevenueBase Database · checked Sep 30, 2026
25	Sunbelt Modular INC	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 30, 2026	1,001-5,000	45 contacts →
	Indirect evidence “At Sunbelt, we specialize in the design, engineering, and manufacturing of custom modular buildings for a wide range of industries.” Source: RevenueBase Database · checked Sep 30, 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: portable office manufacturers. 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 portable office manufacturers.
Partial evidence: Its own public description names part of portable office manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name portable office manufacturers. 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 25 of 312 portable office manufacturers based in the United States

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Portable office manufacturers based in the United States at a glance

As of Sep 30, 2026

30.7%Verified-email coverage

25.0Average contacts per company

11-50Median size (employees)

3.2%Largest-city concentration · Houston

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

116

11-50

106

51-200

201-500

501-1,000

1,001-5,000

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 312 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 portable office manufacturers, 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 the United States whose own description of what they do matches “portable office manufacturers”. 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 portable office manufacturers), 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 portable office manufacturers, and records with no verified work email. Companies headquartered outside United States 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, 2,393 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 30, 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.

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 portable office manufacturers, 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 portable office manufacturers are there based in the United States?

RevenueBase identified 312 portable office manufacturers headquartered in the 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?

Mobile Mini Solutions, headquartered in Phoenix, tops this list with the largest team on record.

Which city has the most portable office manufacturers?

Houston leads with 10 headquartered companies, followed by Phoenix (8) and Miami (6).

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 2,393 verified decision-maker contacts tracked across these 312 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 30, 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.