Most listings are in the $10's per square foot per year. The Ramona submarket is experiencing a a boost in rates. In the last 3 months, the median rate increased $17 per sqft per year.
Compared to the rest of the San Diego market, the Ramona region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 1 listings have been listed, which means new listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 100% of the office spaces in the Ramona 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,900 sqft. Most buildings in this area are approximately 1 floors. Most buildings in this region were built in 1988 and are Class B.