On average, listings lease in the $50's per square foot per year. The Newport Beach submarket is seeing a a boost in rates. In the last 3 months, the median rate rose $18 per sqft per year. That's a 49% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Newport Beach submarket has higher rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 96 listings have been made available, so you'll want to check back regularly for new listings. About 5% of the available leases in the Newport Beach are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 2,220 sqft. Most properties in this area are around 2 floors. Most buildings in this market were built in 1980 and are Class B.