Compared to the rest of the San Diego market, the Oceanside submarket has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 64 listings have been posted online, so you'll want to check back regularly for new listings. 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 1,500 sqft. Most buildings in this area are approximately 2 floors. Most buildings in this region were built in 1985 and are Class B.