In the last 90 days, 0 listings have been posted online, which means listings are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About NaN% of the available space in the Rosemead 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 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 market were built in 1985 and are Class B.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Professional services is the dominant industry in this area. Most of the occupants of Rosemead work from home. Commuting under 5 minutes a day is the norm for those who opt to reside in this part of town.