On average, listings lease in the $30's per square foot per year. The Hayward region is going through a an increase in rates. In the last 3 months, the median rate rose $2 per sqft per year. That's a 8% rise in rent.
Compared to the rest of the East Bay market, the Hayward region has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 15 listings have been posted online, which means new listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 67% of the office spaces in the Hayward 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 available, so finding a space for a small business might be tough.
Even though the median size is 6,050 sqft, there are still 0 spaces below 2,000 sqft. Most buildings in this market are close to 1 stories. Most buildings in this region were built in 1977 and are Class A.