The average rental price for apartments in Hennef (Sieg), Nordrhein-Westfalen, varies depending on the size and location of the property. As of late 2023, the monthly rent for a one-bedroom apartment in the city center typically ranges from €700 to €850, while outside the city center, the prices drop to around €600 to €750. For larger family-sized apartments, a three-bedroom unit in the center can cost approximately €1,200 to €1,500, whereas similar apartments on the outskirts can be found for about €1,000 to €1,300. Additional factors influencing rental prices include proximity to public transport, local amenities, and overall housing demand in the area.