Ekenäs House has been making small cottages for over 40 years. Located in Sweden, they make variety of little buildings like garden sheds, playhouses, saunas, and cottages. Pictured here is the Noemi, and it looks like a great tiny house sized building to me.
You can see all the things they make on the Ekenäs House website. If you don’t read Swedish try the Google Chrome browser, it will translate the website on the fly for you.