The typical asking rate per listing is in the $20's per square foot per year. The San Antonio region is going through a decline in rates. In the last 3 months, the median rate decreased $5 per sqft per year. That's a 17% decline in rent.
Compared to the rest of the San Antonio market, the San Antonio region has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 642 listings have been made available, so you'll want to check back regularly for new listings. About 45% of the available space in the San Antonio are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 2,330 sqft. Most buildings in this area are close to 2 floors. Most buildings in this market were built in 1985 and are Class A.