Most listings are in the $10's per square foot per year. The Jenkintown submarket is going through a decline in rates. In the last 3 months, the median rate decreased $8 per sqft per year. That's a 31% decrease in rent.
In the last 90 days, 3 listings have been listed, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 2,300 sqft. Most properties in this region are approximately 3 stories. Most buildings in this market were built in 1972 and are Class B.