The typical asking rate per listing is in the $20's per square foot per year. The Signal Hill region is going through a a boost in rates. In the last 3 months, the median rate increased $29 per sqft per year. That's a Inf% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Signal Hill region has smaller rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 6 listings have been listed, which means listings might be leasing quickly. 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 1,400 sqft. Most properties in this market are around 2 stories. Most buildings in this market were built in 1982 and are Class B.