On average, listings lease in the $30's per square foot per year. The Huntington Beach region is going through a a rise in rates. In the last 3 months, the median rate went up $32 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the Huntington Beach region has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 58 listings have come on the market, so you'll want to check back regularly for new listings. About 53% of the available space in the Huntington Beach 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 on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,990 sqft. Most buildings in this area are close to 2 floors. Most buildings in this region were built in 1981 and are Class B.