det-7.liv_rendering_final.0 (2) The redevelopment, called 7. Liv, will replace the historic B. Siegel department store with new retailers and multifamily units.

DETROIT—This city’s CBD has undergone a stunning transformation in the past few years. Its streets now throb with activity around the clock, filled with office workers during the day, and new residents and sports fans during the evenings. But that revival has now begun to spread to the city’s outlying neighborhoods.