This lean-to greenhouse was designed so that anyone can build it — clear step-by-step instructions, a complete material list, and CAD-precise plans that take out all the guesswork. Instead of paying $3–5K for a prefab kit that won’t last, you can build this greenhouse for about $1,800 in materials — A greenhouse that’s already been proven in Alberta winters. Plus, a customer of ours has even told us it stood strong through Hurricane Helene! Here’s why over 10,000 builders (actually 15,000 now!)