How can societies ensure urban residents' access to health-promoting green spaces while also pursuing the benefits of densification? Evidence of a relationship between leisure home ownership and health can inform efforts to resolve this dilemma. Using longitudinal register data, we assessed the prospective association between ownership of a leisure home and early retirement for health reasons among 42 588 adults residing in high-density Swedish urban municipalities. The research design included controls for ‘drift’ of unhealthy people into particular residential circum-stances, and other potential alternative explanations for the association of focal interest. After adjustment for age, socioeconomic position, and type of primary housing, logistic regression analysis revealed that men with a leisure home had lower odds of early retirement for health reasons than men who did not own a leisure home. Among women, leisure home ownership interacted with socioeconomic position; in contrast to nonowners, women who owned a leisure home had higher odds of early retirement for health reasons if they also had higher levels of education and employment income. The associations we have uncovered provide additional insight on the relationship between access to natural environments and health, and they warrant consideration in efforts to resolve the densification dilemma.