O A completed master building permit application. O (1) set of signed and sealed plans for review.Total cost of construction was around 750k. Not including the cost of property, permits, expeditor, and design team, and landscaping. The Village Building Department reviews building plans, and issues building permits and certificates of occupancy. It also makes inspections as required. A custom home builder explains the steps involved in building a house in Nassau County, FL, from finding the right land to moving in. Location, design, type of construction, proposed use and exterior dimensions of all buildings. (15). Papers needed to file are: Photocopy of current Nassau County contractor's license,.