The typical asking rate per listing is in the $10's per square foot per year. The Delaware submarket is experiencing a an increase in rates. In the last 3 months, the median rate went up $0 per sqft per year. That's a 1% increase in rent.
In the last 90 days, 2 listings have been made available, which means new availabilities are probably going fast. You'll want to be prepared to make an offer immediately. About 400% of the available space in the Delaware are subleases, so you might be able to snag a great spot on a short term. 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 1,390 sqft. Most properties in this area are around 2 floors. Most buildings in this area were built in 1950 and are Class C.