Most listings are in the $10's per square foot per year. The Liberty submarket is seeing a a rise in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 3% rise in rent.
In the last 90 days, 48 listings have come on the market, so you'll want to check back regularly for new listings. About 2% of the office spaces in the Liberty 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,590 sqft. Most properties in this area are around 1 stories. Most buildings in this market were built in 1983 and are Class B.