On average, listings lease in the $60's per square foot per year. The Foster City region is seeing a decline in rates. In the last 3 months, the median rate fell $16 per sqft per year. That's a 20% decrease in rent.
Compared to the rest of the Silicon Valley market, the Foster City region has greater rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 122 listings have come on the market, so you'll want to check back regularly for new listings. About 4% of the available space in the Foster City are subleases, so you will probably need to consider the implications of signing a direct lease with the building. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,480 sqft. Most properties in this area are close to 4 stories. Most buildings in this market were built in 1988 and are Class A.