Ключевые слова: altbau, apartment, apartments, architecture, art nouceau, berlin, building, century, city, condominium, construction, destroyed, development, exterior, facade, front, germany, home, house, investment, market, old, old building, ornament, overgrown, real estate, refurbishment, renovation, rent, rental, residential, restoration, restored, running costs, sanitation, tenement, turn of the century, unrenovated, unsanitary, window,