Zillow research found that more homeowners are becoming unintentional landlords — selling homes but keeping them as rental properties instead. This reflects broader housing market pressures: sellers unable to sell quickly or profitably at asking prices are converting to rentals, though managing properties brings unexpected costs and complexity. The report uses Zillow's proprietary market data, a credible institutional source, though the headline doesn't specify what percentage of sellers are affected or what time period Zillow studied.