Tumbleweed is one of the best known and oldest brands for tiny houses. They offer detailed plans and host touring workshops around the country. Even if no active coupons are posted, you can always try emailing the company directly about a discount. The worst they can do is say no.
Old Expire Coupons
40OFF was allowing customer to buy 1 workshop ticket and save 40% on the second. Unfortunately, verification for this coupon failed as of 2/1/15.