Most listings are in the $20's per square foot per year. The Delaware submarket is going through a a rise in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 3% rise in rent.
In the last 90 days, 211 listings have been posted online, so you'll want to check back regularly for new listings. About 0% of the available leases in the Delaware 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,330 sqft. Most properties in this region are close to 2 floors. Most buildings in this market were built in 1986 and are Class A.