The actual construction of the sunroom only takes a couple days on average. The entire project with engineering, permitting, preparation work, sunroom construction and/or electrical (if applicable) can take anywhere from a couple of weeks to a couple of months depending on the weather, complexity of the project and the building permit. We are the manufacturer and control everything from design to fabrication to installation. Having everything and everyone in one manufacturing plant does save time and the only truck that your sunroom goes on is our installation truck.