The average rent for a one-bedroom apartment in Köln typically ranges from €900 to €1,300 per month, depending on the neighborhood and amenities. In more central areas like Innenstadt, prices can soar above €1,200, especially for newly renovated units or those with modern facilities. For example, a one-bedroom apartment near the Köln Cathedral may command around €1,400. Conversely, neighborhoods like Ehrenfeld or Nippes might offer more affordable options, with average rents closer to €850 to €1,000. These variations reflect factors such as proximity to public transport, local amenities, and the overall demand within different districts of the city.