Most listings are in the $20's per square foot per year. The Columbia region is experiencing a a boost in rates. In the last 3 months, the median rate increased $0 per sqft per year. That's a 1% increase in rent.
In the last 90 days, 44 listings have been listed, so you'll want to check back regularly for new listings. About 2% of the available space in the Columbia are subleases, so you will probably have to consider a longer term lease. 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 2,000 sqft. Most properties in this area are around 2 floors. Most buildings in this region were built in 1997 and are Class A.