Comment Re:Question: (Score 3, Insightful) 269
If you are planning on building *in* a city, you will disrupt whatever space you choose to develop - up *or* down. If a lot is vacant, would it not be available for building in either direction? There are certain areas where a large amount of *up* is not an option (proximity to airport or public monuments, etc.), and those where *down* will be cost prohibitive (flood plains, bedrock, etc.). But, if you can use your available space in without resulting in public eyesore, why would someone care if it's above ground or below?