In the last 90 days, 13 listings have been posted online, which means new availabilities most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 8% of the available leases in the Waipahu 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 950 sqft. Most properties in this market are close to 2 floors. Most buildings in this region were built in 1980 and are Class B.