Most listings are in the $50's per square foot per year. The Solana Beach region is going through a decrease in rates. In the last 3 months, the median rate fell $6 per sqft per year. That's a 11% decline in rent.
Compared to the rest of the San Diego market, the Solana Beach submarket has higher rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 6 listings have come on the market, which means leases might be 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 2,130 sqft. Most properties in this area are around 2 floors. Most buildings in this area were built in 1988 and are Class A.