The typical asking rate per listing is in the $10's per square foot per year. The Cumberland County submarket is going through a decline in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 11% decline in rent.
In the last 90 days, 47 listings have been posted online, so you'll want to check back regularly for new listings. About 2% of the listings in the Cumberland County are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,600 sqft. Most buildings in this area are around 2 stories. Most buildings in this market were built in 1980 and are Class B.