Most listings are in the $20's per square foot per year. The Port Huron submarket is seeing a a boost in rates. In the last 3 months, the median rate went up $25 per sqft per year.
Compared to the rest of the Metro Detroit market, the Port Huron region has higher rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 11 listings have been made available, which means leases are probably going fast. You'll want to be prepared to make an offer immediately. About 55% of the available space in the Port Huron are subleases, so you might be able to sign a shorter term by taking over a previous lease. There aren't many listings below 2,000 square feet on the market, 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 area are close to 1 floors. Most buildings in this market were built in 1963 and are Class B.