About 20 Twenty SMIĀ 

Portland Accessory Structures (ADUs, Studios, etc.)

Quality manufacturing durable, energy efficient, plant-friendly building materials and living spaces for self storage and more.

Our History

In 2016, we obtained the worldwide rights to all patents and exclusive distribution rights related to GreenFLEX. These include US & International Patents. Our predecessor was founded in 2011 and began production in 2012. Over 400 homes and a few commercial buildings have been built utilizing GreenFLEX. The initial demand for GreenFLEX was working housing in the North Dakota oil fields where GreenFLEX demonstrated its durability and insulative properties. In 2013, our predecessor moved into modular housing; site built panelized construction and tilt-up commercial construction. In 2018, we are working on approval to produce manufactured housing under the HUD program and are expanding into residential housing.




RADCO (3rd party testing for panels)

TRA Green – Emerald Certification (highest award TRA Green offers)


Tiny Homes / Park Models

RVIA (3rd party certification for build codes)