How much house an R-3 lot lets you pour: 35 percent building, 75 percent hard cover
Ormond Beach sets R-3 single-family limits in Land Development Code Sec. 2-15. Buildings can cover 35 percent of the lot. All impervious surface can cover 75 percent. The minimum lot is 8,625 square feet, 75 feet wide and 115 feet deep, with a 25 foot front setback, 20 feet in the rear and 30 feet from a waterbody.
Run the numbers on a minimum-size lot. 35 percent is about 3,019 square feet of building. 75 percent is about 6,469 square feet of roof, driveway, patio and slab combined. The foundation footprint comes out of the first number, and every other pour comes out of the second. The city's own engineer measured 120 single-family homes and found 2,979 square feet of impervious area per home on average.
Other districts have other caps, so ask the Building Division which one covers your lot. We'll mark the footprint on your survey before you draw a thing. Our foundation contractor page explains monolithic versus stem wall, and the rest of the county's permit rules are in our Volusia County permit guide.




