The typical asking rate per listing is in the $10's per square foot per year. The Spring Park region is going through a an increase in rates. In the last 3 months, the median rate rose $18 per sqft per year.
In the last 90 days, 2 listings have been made available, which means new availabilities most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 50% of the office spaces in the Spring Park 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 550 sqft. Most properties in this market are around 1 floors. Most buildings in this region were built in 1960 and are Class C.