Most listings are in the $20's per square foot per year. The New Castle County submarket is going through a decrease in rates. In the last 3 months, the median rate decreased $3 per sqft per year. That's a 10% decline in rent.
In the last 90 days, 178 listings have been listed, so you'll want to check back regularly for new listings. About 1% of the listings in the New Castle County are subleases, so you will probably have to focus your search on direct office leases. 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 2,370 sqft. Most properties in this region are approximately 3 floors. Most buildings in this region were built in 1986 and are Class A.