On average, listings lease in the $10's per square foot per year. The National City submarket is seeing a decrease in rates. In the last 3 months, the median rate decreased $10 per sqft per year. That's a 38% decline in rent.
Compared to the rest of the San Diego market, the National City region has smaller rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 6 listings have come on the market, which means new listings most likley are leasing quickly. 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.
Even though the median size is 59,040 sqft, there are still 0 office spaces below 2,000 sqft. Most buildings in this region are approximately 1 stories. Most buildings in this region were built in 1974 and are Class B.