Welcome to the Everything Boom, or Maybe the Everything Bubble

...

Prefer a more solid asset? The price of office and apartment building has risen similarly; office space in central business districts nationwide costs $300 per square foot on average, up from $147 in early 2010, according to Real Capital Analytics. In Manhattan, an investor in an office building can expect rent payments after expenses to add up to only a 4.4 percent return, known as the capitalization rate, lower than even in 2007, the top of the last boom.