Compared to the rest of the Bay Area market, the East Larkspur submarket has more expensive 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 spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 17% of the listings in the East Larkspur are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 2,000 sqft. Most buildings in this market are approximately 2 floors. Most buildings in this area were built in 1981 and are Class B.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Public administration is the dominant industry in this area. Most of the folk of East Larkspur work from home. Commuting around 30 minutes a day is the norm for those who opt to reside in this part of town.