Compared to the rest of the Bay Area market, the Larkspur region has higher rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 7 listings have been listed, which means listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 14% of the available leases in the Larkspur 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 on the market, so finding a space for a small business might be tough.
Even though the median size is 3,060 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this market are around 2 stories. Most buildings in this market were built in 1981 and are Class B.