The average rent for a one-bedroom apartment in the Retiro district of Madrid typically ranges from €1,200 to €1,700 per month, depending on the specific location and the amenities offered. For instance, apartments closer to the renowned Retiro Park or with views of the park may command higher prices, often exceeding €1,800. Smaller or older buildings can sometimes offer lower rates, around €1,000 to €1,200 per month, particularly if they are located further away from main transportation lines. Additionally, factors such as the building's condition, proximity to metro stations, and available services can notably influence rental prices in this sought-after area of the city.