The four-story building sits on a quiet street in Brooklyn, across from a church and an arts school. Eight apartments, front and back, two on each floor. The building, near the boundary of Clinton Hill and Bedford-Stuyvesant, has gone through incarnations as a rental, then a tenant-run cooperative, then a rental again. The most recent change brought a handful of new tenants, lured not by a landlord seeking to profit off the neighborhood’s gentrification, but by the promise of affordability.