Residential buildings are usually 10 feet per storey. Comericial stories are a little higer, averaging about 14 feet. When selecting a flag pole, you should aim for the pole to be at least slightly higher than the building itself. If you have a two story home, you'd probably want a 25' flagpole. If you have a two story office building, a 30' or 35' pole would be a great start. Remember, most flagpoles are permanet structures. After you pour the cement, you won't want to upgrade any time soon, so choose carefuly! If you need help selecting, just give us a call and a flagpole expert can lead you in the right direction and get you a shipping quote.