On average, listings lease in the $20's per square foot per year. The Lehigh County region is going through a a rise in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 3% rise in rent.
In the last 90 days, 142 listings have been posted online, so you'll want to check back regularly for new listings. About 2% of the office spaces in the Lehigh County are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 3,720 sqft, there are still 0 leases below 2,000 sqft. Most properties in this area are around 2 floors. Most buildings in this region were built in 1983 and are Class B.