On average, listings lease in the $20's per square foot per year. The New Castle County submarket is experiencing a decrease in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 5% decrease in rent.
In the last 90 days, 187 listings have been posted online, so you'll want to check back regularly for new listings. About 2% of the listings in the New Castle 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 2,350 sqft. Most properties in this area are close to 3 stories. Most buildings in this region were built in 1986 and are Class A.