I once worked for a short time on a windfarm in germany, these turbines were whoppers, the hub was 100 feet high and the blade came to within 20 feet of the ground. You could only hear them if the blade passed over your head. Strangely enough when the wind is blowing enough to make them produce electricity you can hear bugger all because of the noise the wind makes blowing through the vegetation. It is not a good idea to fix them to houses because if it is small enough to fix to a house it is not high enough too small to be worthwhile having it. Having had a yacht with a wind turbine, I have personal experience of the vibration that is transmitted into the supporting structure, comforting to know that it is charging your batteries, but in a strong wind a bit unsettling.