The typical asking rate per listing is in the $20's per square foot per year. The Carson region is going through a an increase in rates. In the last 3 months, the median rate went up $6 per sqft per year. That's a 35% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Carson region has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 8 listings have come on the market, which means spaces most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. 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 1,080 sqft. Most buildings in this market are around 2 floors. Most buildings in this market were built in 1984 and are Class B.