Most listings are in the $20's per square foot per year. The Industry submarket is going through a an increase in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 7% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Industry region has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 6 listings have been posted online, which means spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 117% of the available leases in the Industry 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 1,340 sqft. Most properties in this area are approximately 2 floors. Most buildings in this area were built in 1986 and are Class A.