Most listings are in the $20's per square foot per year. The Wilmington region is experiencing a a boost in rates. In the last 3 months, the median rate went up $26 per sqft per year.
In the last 90 days, 48 listings have been posted online, so you'll want to check back regularly for new listings. About 140% of the office spaces in the Wilmington are subleases, so you might be able to find a shorter term or below market rent. 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 2,020 sqft. Most properties in this area are close to 1 stories. Most buildings in this market were built in 1995 and are Class B.