Mountain View Splits: Office Rents Hit Silicon Valley-High $7.86 as R&D Asking Rents Fall 8.4%

Mountain View's office market cut its available space in half over the past year and now commands Silicon Valley's highest asking rents, while the city's R&D buildings along Bayshore Parkway and Middlefield Road are moving the other way, with asking rents down 8.4 percent and more than 40 percent of South Middlefield's R&D inventory available, according to third-quarter 2026 data from Newmark and Colliers.