On average, listings lease in the $10's per square foot per year. The River Park submarket is experiencing a decrease in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 6% decline in rent.
In the last 90 days, 16 listings have come on the market, which means leases most likley are 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 1,240 sqft. Most buildings in this area are approximately 1 stories. Most buildings in this area were built in 1984 and are Class B.