On average, listings lease 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 increased $48 per sqft per year.
Compared to the rest of the East Bay market, the Blackhawk region has more expensive rates, and you'll need to make a great offer to be in this hot region.
In the last 90 days, 1 listings have been posted online, which means office spaces 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 properties in this market are around 2 stories. Most buildings in this region were built in 1989 and are Class A.