In the last 90 days, 0 listings have been posted online, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About NaN% of the office spaces in the Imperial Beach are subleases, so you will probably have to consider a longer term lease. 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 sqft. Most buildings in this area were built in 1975 and are Class A.