The typical asking rate per listing is in the $50's per square foot per year. The Solana Beach region is going through a a rise in rates. In the last 3 months, the median rate went up $7 per sqft per year. That's a 15% rise in rent.
Compared to the rest of the San Diego market, the Solana Beach submarket has more expensive rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 7 listings have been posted online, which means office spaces are probably going fast. You'll want to be prepared to make an offer immediately. About 14% of the office spaces in the Solana Beach 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 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 1,780 sqft. Most properties in this market are around 3 floors. Most buildings in this region were built in 1986 and are Class A.