On average, listings lease in the $20's per square foot per year. The Signal Hill region is seeing a decrease in rates. In the last 3 months, the median rate fell $9 per sqft per year. That's a 30% decline in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Signal Hill region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 5 listings have come on the market, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. 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 1,340 sqft. Most buildings in this area are around 2 stories. Most buildings in this region were built in 1982 and are Class B.