Most listings are in the $20's per square foot per year. The New Castle County submarket is going through a a boost in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 2% rise in rent.
In the last 90 days, 148 listings have been listed, so you'll want to check back regularly for new listings. About 2% of the available space in the New Castle County are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 2,820 sqft, there are still 0 spaces below 2,000 sqft. Most properties in this market are close to 3 floors. Most buildings in this region were built in 1986 and are Class A.