Possible don't know but there's weehouse.com? http://smallhousesociety.net/designers-builders/

Check out Studio Shed, we are preferred installers for them and we work all around the Denver area. If you are interested, contact us!

Another place is http://www.f9productions.com/

Thanks! I like the optios you have. Is there a way to search on square footage? I'm looking for something (4 season or could be made to be 4 season) that I may have to live in for a couple of months (with 2 Great Danes) but would ultimately be an office/workshop/guest house. So looking for 300-500 sq ft. THANKS!

Another way to search = "lane way houses". There are several firms throughout N. America that are making lane way homes (carriage homes, cottages, etc) their specialty. Most will have the ability to work between 400sf - 1200sf without much of a problem.