Futurian House
from Fancyclopedia 1 ca. 1944
306 W 213th St. New York NY. The first Futurian science fiction house, it was inhabited by uncounted of them briefly in the late summer of 1939 until the ex-owner of the house was foreclosed upon and new owner hoisted the ante. The Futurians moved to the Ivory Tower.

from Fancyclopedia 2 Supplement ca. 1960:
Futurian House was actually in Brooklyn. The address given for it was the Kornbluth parental home, HQ of The Cabal — a group quite unknown to Speer.

See also Futurian Houses.