You can purchase the building plan set for $800 or the CAD files with the building plan set for $1500. Plans are rarely a 100% a perfect fit because each lot is unique, but many can come close! We modify purchased plans at the rate of $175 per hour, for up to ten hours as long as we stay in the scope of the original project. Updating the exposure, redesigning the foundation finish and foundation plan can take 1-3 hours depending on the changes. If you want to get a free estimate of modifications to the 1st and 2nd floor, please call one of our offices to set up an appointment with one of our draftsman. Typically when you call one of our draftsman will answer and you may be able to go over your questions at that time. We also need to stay in the scope of the plan purchased. Typically when you start adding rooms or taking them away, it will take over 10 hours to update the full plan set and we often fall out of the scope of the original project. If you go out of the scope of the original project or after that ten hour mark, we consider it a new custom plan. Our cost would revert back to that original $1.30 per heated square foot and $0.65 per square foot for the foundation finish. We would apply the paid $800 to the balance of the custom plan price.