Most listings are in the $10's per square foot per year. The Gladstone region is going through a a boost in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 17% increase in rent.
In the last 90 days, 9 listings have come on the market, which means listings might be going fast. You'll want to be prepared to make an offer immediately. 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 900 sqft. Most buildings in this area are approximately 2 stories. Most buildings in this market were built in 1971 and are Class B.