[tkgally]

The Internet Archive has many catalogs of house plans from Sears and other suppliers:

https://archive.org/details/artisticmodernho00asso/mode/2up

https://archive.org/details/BetterHomesAtLowerCostACollectio...

https://archive.org/details/ClevelandPublicationsModernhomes...

https://archive.org/details/GarlinghouseAmericasBestHomePlan...

https://archive.org/details/honorbiltmodernh00sear

https://archive.org/details/ModernHomes-Sears/mode/2up

https://archive.org/details/modernhomes00nati/mode/2up

https://archive.org/details/ModernHomesSearsRoebuckCo

https://archive.org/details/PlansOfModernHomes320/mode/2up

https://archive.org/details/Sears1919Pg001

https://archive.org/details/SearsModernHomes1917Pg00000

[phoenixreader]

What you showed are the advertisements of the homes, but these are not the instructions that Sears sold. I assume the instructions would include a bill of materials and the step-by-step assembly process.