[2] Mittleman was known for employing large numbers of workers and finishing construction within months after beginning.

In late March, 1930, Mittleman applied for an exemption to Portland's building code that would allow him to place a backyard on the side of the 100-foot square lot that would become Blackstone Apartments at 395 West Park Street.

[3] The address was later changed to 1831 SW Park Avenue according to the 1933 street renumbering system.

[4] In early April, Mittleman estimated construction costs at $120,000 and began excavation soon thereafter.

[6] The new apartment building offered a "gorgeously furnished," five-room suite and choice, smaller units.