The typical asking rate per listing is in the $10's per square foot per year. The Downtown Riverfront submarket is going through a a boost in rates. In the last 3 months, the median rate went up $16 per sqft per year.
In the last 90 days, 23 listings have come on the market, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 9% of the available leases in the Downtown Riverfront 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.
The standard measurement for office space in this area is around 740 sqft. Most buildings in this region are approximately 4 stories. Most buildings in this region were built in 0 and are Class Class B.
This region is fairly equally mixed residential and commercial. Professional services is the dominant industry in this market. Most of the residents of Downtown Riverfront work from home. Commuting close to 15 minutes a day is the norm for those who opt to reside in this part of town.