The typical asking rate per listing is in the $10's per square foot per year. The York County submarket is going through a decrease in rates. In the last 3 months, the median rate fell $11 per sqft per year. That's a 40% decrease in rent.
In the last 90 days, 28 listings have been listed, which means new availabilities most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 1,550 sqft. Most properties in this area are around 2 floors. Most buildings in this market were built in 1900 and are Class Class.