On average, listings lease in the $20's per square foot per year. The Union County submarket is experiencing a an increase in rates. In the last 3 months, the median rate increased $22 per sqft per year.
In the last 90 days, 20 listings have been posted online, which means spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 220% of the listings in the Union County 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 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 750 sqft. Most properties in this area are around 1 floors. Most buildings in this area were built in 1990 and are Class B.