The typical asking rate per listing is in the $10's per square foot per year. The Knightdale submarket is going through a a rise in rates. In the last 3 months, the median rate went up $18 per sqft per year.
Compared to the rest of the The Triangle market, the Knightdale region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 6 listings have come on the market, which means new listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 17% of the listings in the Knightdale 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,980 sqft. Most buildings in this market are approximately 2 stories. Most buildings in this market were built in 2000 and are Class B.