The typical asking rate per listing is in the $20's per square foot per year. The Valley Park region is going through a an increase in rates. In the last 3 months, the median rate increased $20 per sqft per year.
In the last 90 days, 0 listings have been listed, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About Inf% of the listings in the Valley Park are subleases, so you might be able to find a shorter term or below market rent. 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 700 sqft. Most buildings in this region are approximately 2 floors. Most buildings in this area were built in 2006 and are Class B.