The typical asking rate per listing is in the $40's per square foot per year. The Blackhawk submarket is seeing a a rise in rates. In the last 3 months, the median rate went up $48 per sqft per year.
Compared to the rest of the East Bay market, the Blackhawk submarket has greater rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 1 listings have been posted online, which means new availabilities most likley are leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 250 sqft. Most buildings in this area are approximately 2 stories. Most buildings in this region were built in 1989 and are Class A.