The typical asking rate per listing is in the $20's per square foot per year. The New Castle County submarket is seeing a decrease in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 5% decrease in rent.
In the last 90 days, 192 listings have been made available, 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 have to consider a longer term lease. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,380 sqft. Most properties in this market are close to 3 floors. Most buildings in this area were built in 1986 and are Class A.