Most listings are in the $10's per square foot per year. The Gladstone submarket is going through a a boost in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 7% increase in rent.
In the last 90 days, 29 listings have been listed, which means spaces are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 3% of the available leases in the Gladstone are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 4,180 sqft, there are still 0 new availabilities below 2,000 sqft. Most properties in this region are approximately 2 stories. Most buildings in this area were built in 1983 and are Class B.