Most listings are in the $20's per square foot per year. The Honolulu County region is going through a a rise in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 3% rise in rent.
In the last 90 days, 148 listings have been made available, so you'll want to check back regularly for new listings. About 3% of the available space in the Honolulu County are subleases, so you will probably have to consider a longer term lease. 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 1,350 sqft. Most properties in this region are around 2 stories. Most buildings in this area were built in 1968 and are Class A.