Garage ideas and tips.

Your options will be limited by your town's bylaws as far as height and square footage as you have stated already. What you need to consider is how you plan to use the space, and try to organize in a way that will make it most functional for you. When I built my garage, I planned for a 10' ceiling, a useable attic space, and a "work area" where my hoist is located. I put in a single overhead door, 16 X 8 ft, and I offset it to one side slightly, about 18 inches IIRC, to leave a space for a small workbench that would be out of the way. I also put in some 32 110 volt outlets, 1 every 4 ft, about 4 ft above the floor, as well as every 4 ft staggered at about 6 ft above the floor, and 2 230 volt outlets. The garage measures 24 X 30 ft, I can put 4 vehicles in it, but it is cramped with more than 3. I have an upright 80 gallon compressor tucked in a corner, with a built in shelf beside it that measures about 3 1/2 ft wide by 1 1/2 ft deep by 10 ft high with 5 shelves. It has room to store a complete V8 engine and my welder under it, and is made of 2x6 lumber. My workbench is in the opposite corner, it measures about 60 by 36 inches, and can store 2 V8s under it. I recently added a 40 foot airhose reel, which will reach anywhere inside the shop, and I have enough additional hose to reach another 75 ft. The attic has a trap door access but requires a step ladder to reach. The attic measures about 8 ft wide by 2 1/2 high by 30 ft long, with 2 incandescent lights. I have 2 8 ft T5 fluorescent lights over the work area, plus 2 LED bulbs in the center, and 2 incandescent bulbs at the far end, and 2 metal halide lamps that I can plug in when needed.
I have only 1 small 24 by 30 inch window as I have had problems in the past with break ins through windows. My overall height is 14 ft 5 inches at the peak, and I used metal sheeting for the roof as I never want to have to replace it in my lifetime. I have a 2 post MaxJax hoist that runs on 110 volts, and will lift up to 5500 lbs to a height of about 4 feet. I have lifted a variety of different vehicles with it, and the only time I got close to the ceiling was with my Bronco, using 4 inch blocks on the pads to give as much lift as possible as I was swapping the transmission, and needed it high enough to get my trans jack under the truck. In the summer months I have no more than 2 vehicles inside, but during winter I don't do any work unless it's urgent, as I have no insulation or heat at this point, and have at least 1 vehicle stored for the season, plus my Bronco and wife's car.