Most listings are in the $20's per square foot per year. The Gladstone submarket is going through a a rise in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 3% rise in rent.
In the last 90 days, 29 listings have been listed, which means new availabilities most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 3% of the available space in the Gladstone 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 on the market, so finding a space for a small business might be tough.
Even though the median size is 3,000 sqft, there are still 0 listings below 2,000 sqft. Most buildings in this market are around 2 stories. Most buildings in this market were built in 1983 and are Class B.