Oregon has regulations that certify components used within the state for prefabricated construction.
Learn more about how Premier SIPS has quickly become the no. 1 go-to prefabricated framing system for energy-efficient, sustainable structures.
More on tax incentives:
https://sips.premierbuildingsystems.com/blog/sips-tax-incentives
Oregon partner: https://www.gsmw.com/
Oregon contact for Premier Building Systems: https://sips.premierbuildingsystems.com/contact-wiles
Downloadable documents:
https://sips.premierbuildingsystems.com/design-resources
Idaho based:
https://spanels.com/
Also Idaho, but past work in Siletz area?
https://maple-brook.com/SIPs.html
[They can adapt or develop basic plans.]
Sip-ua.com
Cheaper than Callcentric and Les.net, and supports SMS with app