Sturdi-Built Greenhouse Manufacturing Co. creates high-quality handcrafted redwood and glass greenhouse kits. For over 60 years, Sturdi-Built has made beautiful, high-quality greenhouse kits in their factory in Portland, Oregon using Clear All-Heart Redwood. Excellent materials make their greenhouses naturally durable and exceptionally beautiful, with a wide variety of sizes and styles available. Their kits can be in lean-to, freestanding and attached styles, large or small. They frequently customize kits to fit custom situations.