On average, listings lease in the $30's per square foot per year. The Carlsbad submarket is going through a a rise in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 8% increase in rent.
Compared to the rest of the San Diego market, the Carlsbad region has higher rates, and you'll need to pay a premium to be in this hot region.
In the last 90 days, 94 listings have been listed, so you'll want to check back regularly for new listings. About 5% of the listings in the Carlsbad are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 3,000 sqft, there are still 0 new availabilities below 2,000 sqft. Most buildings in this area are approximately 2 stories. Most buildings in this area were built in 1998 and are Class B.