Compared to the rest of the Silicon Valley market, the Belmont region has higher rates, and you'll need to pay a premium to be in this hot submarket.
In the last 90 days, 14 listings have been made available, which means new availabilities most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 7% of the available leases in the Belmont are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 3,280 sqft, there are still 0 listings below 2,000 sqft. Most buildings in this market are around 4 stories. Most buildings in this area were built in 2000 and are Class B.