On average, listings lease in the $20's per square foot per year. The Fountain Valley region is going through a an increase in rates. In the last 3 months, the median rate went up $21 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the Fountain Valley region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 13 listings have been listed, which means new listings might be leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 31% of the available leases in the Fountain Valley are subleases, so you might be able to snag a great spot on a short term. 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 2,400 sqft. Most properties in this area are approximately 3 floors. Most buildings in this region were built in 1983 and are Class B.