RADCO Third Party Plan Review

Inspection And Certification: HUD, MODULAR, Park Models

Written by Janet Thome

We want to thank and welcome RADCO to THIA as a new commercial member, adding their vast expertise to the tiny home industry.

RADCO, founded in 1967  is recognized as an independent third-party testing laboratory (TL-209), listing agency, and a Quality Assurance Inspection Agency (AA-650) by IAS (International Accreditation Service, Inc.).


RADCO is recognized as an independent third-party testing laboratory (TL-209), listing agency, and a Quality Assurance Inspection Agency (AA-650) by IAS (International Accreditation Service, Inc.). RADCO is also nationally recognized as a Design Approval Inspection Agency (DAPIA) and Inspection Primary Inspection Agency (IPIA) for the Manufactured Housing program (HUD) and can provide DAPIA and IPIA certification for any state modular program that allows a third-party to do so.

In addition to the above services, RADCO has extensive experience in approval for gas systems and special flame effects used in the entertainment industry, as well as Plan Review and Inspection services for Special Purpose Commercial Modular’s (SPCM), Park Models, MRI units, and much, much more. Founded in 1967 as a service-oriented engineering company, RADCO has since grown in its services as well as geographically.

Headquartered in Long Beach, CA, RADCO has branch offices across the US and several geographically located Inspectors to better serve our clients.

What sets us apart from our competition is our people and their knowledge and experience. RADCO also offers one of the best pricing options for our Testing, Listing, and Inspection service line. With state-of-the-art technology, our experienced team, and our extensive knowledge of the American Standards and code compliances, we are sure to better serve our clients.


RADCO is recognized as a Testing Laboratory (TL-209) and as a Quality Assurance Inspection Agency (AA-650) by the IAS (International Accreditation Service, Inc.). These approvals supersede RADCO’s previous approvals from the NES and the ICBO-ES. Both of RADCO’s IAS approvals are recognized internationally, giving RADCO’s test reports and QA inspections full acceptance in many countries around the world, including Canada, Mexico, the Pacific Rim countries such as Australia, Japan, South Korea, as well as Europe.

RADCO provides a product listing service with follow-up inspections. Our testing and listing capabilities are recognized by many cities, counties, and states, including California, Arizona, Washington, and the city of Denver. RADCO is an administrator for the Society of the Plastics Industry (SPI) ‘Accu-R’ program for Expanded Polystyrene Insulation, and HUD Use of Materials Programs, UM 71A and UM 101. RADCO is fully approved by HUD, as a DAPIA (Design Approval Primary Inspection Agency), and IPIA (Inspection Primary Inspection Agency), in the federal Manufactured Housing program.

RADCO also serves on the HUD Manufactured Housing Consensus Committee (MHCC). RADCO is fully recognized as a Third Party plan review and inspection agency for factory-built (modular) residential and commercial structures by the IBC (Industrialized Building Commission), and all states with such programs.

RADCO3220 East 59th Street

Long Beach, CA 90805

(562) 272-7231



Photo Credit: Digz 2 Go


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