Most listings are in the $30's per square foot per year. The Vista region is experiencing a an increase in rates. In the last 3 months, the median rate rose $33 per sqft per year.
Compared to the rest of the San Diego market, the Vista submarket has smaller rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 41 listings have been made available, so you'll want to check back regularly for new listings. About 59% of the office spaces in the Vista 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 1,550 sqft. Most properties in this market are around 2 stories. Most buildings in this market were built in 1999 and are Class B.