Most listings are in the $20's per square foot per year. The York County region is going through a a rise in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 14% rise in rent.
In the last 90 days, 22 listings have been posted online, which means new listings are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 9% of the listings in the York County 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 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 2,500 sqft. Most buildings in this market are around 1 stories. Most buildings in this region were built in 1998 and are Class B.