Most listings are in the $10's per square foot per year. The Cumberland County region is going through a a boost in rates. In the last 3 months, the median rate went up $0 per sqft per year. That's a 1% increase in rent.
In the last 90 days, 68 listings have come on the market, so you'll want to check back regularly for new listings. About 1% 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 posted, 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 properties in this area are close to 2 stories. Most buildings in this market were built in 1988 and are Class B.