Most listings are in the $10's per square foot per year. The Norristown region is going through a a boost in rates. In the last 3 months, the median rate rose $20 per sqft per year.
In the last 90 days, 2 listings have been made available, which means leases most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 10,900 sqft, there are still 0 listings below 2,000 sqft. Most properties in this region are approximately 3 floors. Most buildings in this market were built in 1955 and are Class C.