This looks like a good outfit to me. Real carpenter at work, good designs. Bodega is in West Sonoma County, about 1-1/2 hours north of San Francisco.
“Everybody needs an extra room, be it for a studio, shop, extra bedroom, reading room, work out machines, or storage. Most counties allow for a storage building of 120 sq. ft. floor space without a permit. This is a handy place to begin. You can put a building on your property and use it to store your books and a comfortable chair, tools, or art supplies.
We are building 120 sq. ft. buildings and adding window seats which do not count in the square footage. Window seats add a lot to a building. They make the interior more useable and spacious and they make the exterior more interesting. We are producing a 120 sq. ft. building with three window seats for around $10,000. This is possible because we have developed a building method using 1-1/8″ plywood for floors, walls and roof.…” https://www.bodegaportablebuildings.com/