Laneway suites, also called garden suites or auxiliary dwelling units (ADUs), are self-contained residential units located on the same lot as a primary home. Popular in cities like Hamilton and Toronto, they offer rental income, multigenerational living, and increased housing supply. Challenges can include grading, drainage, and utility connections. Proper planning, including topographic surveys and engineering designs, is essential. Despite these challenges, laneway suites provide financial, social, and environmental benefits, making them a valuable addition to urban properties.