As Wall Street buys up entire neighborhood blocks, driving up corporate purchases of single-family homes to historic highs, housing advocates warn companies ... are harming their tenants and pricing out would-be homebuyers. Now policymakers in states across the country and Washington, DC, are finally beginning to push back but they're facing the might of a powerful new single-family rental lobby. Driven by the pandemic-era real estate boom, corporate landlords are ramping up their purchases of assets like apartment buildings and mobile home communities nationwide. They're especially active in fast-growing Sun Belt markets like Phoenix and Atlanta, where more than a third of homes on the market are now being purchased by private equity firms like Blackstone or dedicated single-family rental companies. Even Amazon founder Jeff Bezos has entered the single-family housing market. Critics say that such companies' encroaching presence in the housing market and their focus on short-term profits are pricing out first-time homebuyers and gentrifying neighborhoods, contributing to an ongoing housing crisis. A 2022 study by federal lawmakers found that five major rental companies hiked their fees by 40 percent over a three-year period and saw their tenants fall behind in rent. In California, the state's largest corporate landlord, Invitation Homes, was forced to pay $2 million in sanctions after the state attorney general found it was charging tenants illegally high rents.