Most listings are in the $20's per square foot per year. The Industry region is going through a a boost in rates. In the last 3 months, the median rate increased $2 per sqft per year. That's a 7% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Industry submarket has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 6 listings have been made available, which means new availabilities most likley are going fast. You'll want to be prepared to make an offer immediately. About 117% of the office spaces in the Industry are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet available, 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 around 2 floors. Most buildings in this market were built in 1986 and are Class A.