Most listings are in the $20's per square foot per year. The Durham region is seeing a an increase in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 3% increase in rent.
Compared to the rest of the The Triangle market, the Durham submarket has lower rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 76 listings have been posted online, so you'll want to check back regularly for new listings. About 5% of the office spaces in the Durham are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 1,930 sqft. Most properties in this area are around 2 stories. Most buildings in this area were built in 1995 and are Class A.