On average, listings lease in the $30's per square foot per year. The Concord region is seeing a an increase in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 4% increase in rent.
Compared to the rest of the East Bay market, the Concord submarket has higher rates, and you'll need to make a great offer to be in this hot region.
In the last 90 days, 33 listings have been posted online, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 9% of the listings in the Concord are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 2,200 sqft. Most properties in this area are approximately 2 floors. Most buildings in this market were built in 1984 and are Class A.