Most listings are in the $20's per square foot per year. The Riviera Beach region is going through a an increase in rates. In the last 3 months, the median rate increased $21 per sqft per year.
Compared to the rest of the Gold Coast market, the Riviera Beach submarket has lower 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. About 133% of the available space in the Riviera 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 1,360 sqft. Most buildings in this area are approximately 2 floors. Most buildings in this area were built in 1988 and are Class B.