P3 experts can provide a free consultation about your home elevation, house reconstruction, and business elevation. With over 25 years of experience,Exterior elevation plans must show exterior materials, windows and doors, roof slopes, chimneys, and overhangs. A development permit is required for any improvement to a property. Apply for the appropriate permit for your situation on Civic Access. A site plan is a detailed drawing of proposed improvements and construction on a lot. Our extensive collection of house plans are easy to read, versatile, and affordable, with a seamless modification process available if your plans need to be changed to suit your lifestyle and personal choice. Exterior elevation plans are drawn to a scale of ¼" = 1'. Elevation certificates are FEMA forms used to rate a structure for flood insurance purposes. Contain a complete address and legal description; and, 5.