At least in the bay area the retail on the bottom, housing on the top is now quite commonly built. There are new units in Mtn View, Sunnyvale, Santa Clara, and

At least in the bay area the retail on the bottom, housing on the top is now quite commonly built. There are new units in Mtn View, Sunnyvale, Santa Clara, and San Jose. And maybe if the courts don't stop it, Cupertino :-)