As a general rule, a permit is not needed for our average-sized greenhouse. If you are concerned, contact your local building and zoning departments to determine if a permit is required. If you are a member of a homeowners association (HOA), you may want to check their rules also.
Electricity and Water
Our greenhouses do not require electricity or water. If you want a fan for ventilation, lights, or supplemental heat, consider installing electricity in the greenhouse. Many people choose to have water inside the greenhouse so they have easy access to it. Both water and electrical lines can be laid before the foundation is built. Ask your contractor for details.
Foundation / Base
A strong, stable foundation will give your new greenhouse a firm base. Basically, the greenhouse needs solid support around the entire edge. Poured cement is best but pressure-treated lumber will also work. What you do with the center of the site–the floor of the greenhouse–is completely up to you. You can also choose to have a short wall foundation with a cut-out for a drop door. We do not build the foundation. A qualified contractor can do it or you can build it yourself. An inadequate foundation will void the warranty. Below are some foundations that other customers had built.