Most listings are in the $10's per square foot per year. The Smithfield region is seeing a an increase in rates. In the last 3 months, the median rate rose $18 per sqft per year.
Compared to the rest of the The Triangle market, the Smithfield region has less expensive rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 6 listings have come on the market, which means leases might be going fast. You'll want to be prepared to make an offer immediately. 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 170 sqft. Most buildings in this area are approximately 1 floors. Most buildings in this area were built in 1995 and are Class B.