On average, listings lease in the $60's per square foot per year. The Foster City submarket is going through a decrease in rates. In the last 3 months, the median rate fell $16 per sqft per year. That's a 20% decline 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 region.
In the last 90 days, 6 listings have been posted online, which means listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 83% of the available space in the Foster City are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet available, 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 buildings in this market are close to 4 floors. Most buildings in this area were built in 1988 and are Class A.