The typical asking rate per listing is in the $20's per square foot per year. The Downtown Riverfront submarket is seeing a a rise in rates. In the last 3 months, the median rate increased $7 per sqft per year. That's a 42% rise in rent.
In the last 90 days, 11 listings have been made available, which means spaces most likley are going fast. 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 have to consider a longer term lease. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,570 sqft. Most buildings in this region are around 3 stories. Most buildings in this area were built in 0 and are Class Class B.
This area is fairly equally mixed residential and commercial. Professional services is the dominant industry in this market. Most of the folk of Downtown Riverfront work from home. Commuting around 15 minutes a day is the norm for those who opt to reside in this part of town.