On average, listings lease in the $30's per square foot per year. The Concord submarket is experiencing a an increase in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 4% rise in rent.
Compared to the rest of the East Bay market, the Concord region has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 34 listings have been listed, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 12% of the listings in the Concord are subleases, so you might be able to snag a great spot on a short term. 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 2,200 sqft. Most buildings in this region are approximately 2 stories. Most buildings in this region were built in 1984 and are Class A.