On average, listings lease in the $70's per square foot per year. The Foster City submarket is experiencing a an increase in rates. In the last 3 months, the median rate increased $11 per sqft per year. That's a 16% increase in rent.
Compared to the rest of the Silicon Valley market, the Foster City submarket has higher rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 12 listings have come on the market, which means leases most likley are going fast. You'll want to be prepared to make an offer immediately. About 8% of the listings in the Foster City are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 5,750 sqft, there are still 0 new availabilities below 2,000 sqft. Most properties in this region are around 4 stories. Most buildings in this market were built in 1985 and are Class A.