On average, listings lease in the $0's per square foot per year. The Concord submarket is going through a decrease in rates. In the last 3 months, the median rate decreased $33 per sqft per year. That's a 100% decrease in rent.
In the last 90 days, 0 listings have been posted online, which means spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About NaN% of the office spaces in the Concord are subleases, so you will probably have to focus your search on direct office leases. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around sqft. Most properties in this region are around 1 floors.