I built a garage with storage space on top, I guess you could call it a "second floor" and instead of a stairs I made an elevator/lift of sorts so that we can get up there with no problems. Having storage up on top is wonderful, but unless you have easy access to the storage area, it isn't of much use to you. Going up a stairs with large objects (not necessarily heavy objects, just large ones) can be very difficult. With the elevator/lift it is pretty simple to get large and/or heavy objects up there without the danger of falling. It works well for us, possibly this is something you may be able to incorporate in your garage.