Most listings are in the $20's per square foot per year. The Port Huron submarket is going through a an increase in rates. In the last 3 months, the median rate rose $6 per sqft per year. That's a 35% increase in rent.
Compared to the rest of the Metro Detroit market, the Port Huron region has more expensive rates, and you'll need to make a great offer to be in this hot region.
In the last 90 days, 11 listings have been posted online, which means new availabilities might be going fast. You'll want to be prepared to make an offer immediately. About 9% of the available leases in the Port Huron are subleases, so you will probably have to focus your search on direct office leases. 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 350 sqft. Most buildings in this region are approximately 1 stories. Most buildings in this region were built in 1963 and are Class B.