Actually not really :-) Total office space in the San Jose and &#x27;South bay&#x27; area, which covers about 1&#x2F;2 of what people think of as Silicon valley (people in Mtn View, Palo Alto, Atherton, and Fremont and Milpitas aren&#x27;t &#x27;south bay&#x27; but are often lumped into the Silicon Valley pile. Is over 109M square feet[1], the &#x27;sprawling suburban square miles&#x27; add an additional 50M square feet. Midtown Manhattan was at 143M square feet in in 2013 [2], but I&#x27;ll grant you its surprisingly similar.<p>What tall buildings give you of course is easier mass transit since you get better economies making a few stations which can serve a million, rather than a lot of stations that serve only thousands.<p>[1] <i>Total  office  inventory  in  the  South  Bay&#x2F;San  Jose  market  area amounted to 106,215,509 square feet in 4,417 buildings as of the end of the second quarter 2009.</i> -- Pg 12, <a href="https:&#x2F;&#x2F;www.sanjoseca.gov&#x2F;DocumentCenter&#x2F;View&#x2F;1623" rel="nofollow">https:&#x2F;&#x2F;www.sanjoseca.gov&#x2F;DocumentCenter&#x2F;View&#x2F;1623</a><p>[2] 142,809,572 (table 1) -- <a href="http:&#x2F;&#x2F;www.thesquarefoot.com&#x2F;blog&#x2F;posts&#x2F;manhattan-q3-2013-office-space-market-statistics" rel="nofollow">http:&#x2F;&#x2F;www.thesquarefoot.com&#x2F;blog&#x2F;posts&#x2F;manhattan-q3-2013-of...</a>