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 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 RADCO  apart from our competition is their employees and their knowledge and experience. RADCO also offers one of the best pricing options for Testing, Listing, and Inspection service line. With state-of-the-art technology, their  experienced team, and extensive knowledge of the American Standards and code compliance.


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.

Memberships And Recognition

RADCO is accredited and recognized by many state and national accreditation bodies. RADCO is also a member of several industry organizations, including ICC, IAS, The Modular Building Institute, NMEDA and the Manufacturing Housing Institute.

What Is A Modular Home?

Modular homes are factory built homes that are built off site in a quality climate controlled building facility. Modular homes are built to local and state building codes, exactly like a site built home and built with the same quality materials as a site built home. Modular homes are transported to the home or building site after it is built.

Movable Tiny Homes: Built To ANSI Codes

Los Angeles just approved movable tiny homes as ADUs, following Fresno and San Luis Obispo. Movable tiny homes must meet  the American National Standards Institute ( ANSI) requirements of the National Fire Protection Association ( NFPA ) 1192 standards and is certified for ANSI or NFPA compliance. This would follow under certification for RVs and park models. RACDO provides this service.

LA Ordinance

Office Locations And Contact

California Office (Headquarters)

3220 East 59th Street Long Beach, CA 90805 Office: 562-272-7231 Fax: 562-529-7513

Arizona Office

2318 W. Tanner Ranch Road Queen Creek, AZ 85142 Office: 336-879-4788 Fax: 336-879-2760

Florida Office

5801 Benjamin Center Drive, Suite 102 Tampa, FL 33634 Office: 813-243-0370 Fax: 813-243-1314

North Carolina

340 Meadow Springs Road Seagrove, NC 27341 Office: 336-879-4788 Fax: 336-879-2760

Indiana Office

4057 Lakeshore Drive Bremen, IN 46506 Office: 574-831-6833 Fax: 574-831-6833

Photo Credit: Digz 2 Go And Designs By Paul Nyulassie

Architectural Designer And Builder Of Modulars, ADUs And Movable Tiny Homes ( Park Models) certified by RADCO

Contact RADCO