Most listings are in the $20's per square foot per year. The Union City submarket is seeing a decline in rates. In the last 3 months, the median rate decreased $11 per sqft per year. That's a 35% decline in rent.
In the last 90 days, 4 listings have been posted online, which means new availabilities might be going fast. You'll want to be prepared to make an offer immediately. 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 1,500 sqft. Most buildings in this area are close to 2 floors. Most buildings in this area were built in 1925.