The typical asking rate per listing is in the $10's per square foot per year. The Guilford Center submarket is going through a an increase in rates. In the last 3 months, the median rate went up $16 per sqft per year.
In the last 90 days, 6 listings have come on the market, which means spaces might be going fast. You'll want to be prepared to tour spaces as quick as possible. About 167% of the listings in the Guilford Center are subleases, so you might be able to snag a great spot on a short term. 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 730 sqft. Most properties in this region are close to 2 floors. Most buildings in this market were built in 1988 and are Class B.