The Americans with Disabilities Act (ADA) has been the law for more than three decades, yet landlords and tenants routinely misunderstand who is responsible for ensuring that commercial properties are accessible. Those misunderstandings can lead to lawsuits, expensive retrofits, and strained landlord-tenant relationships. A carefully negotiated lease can eliminate much of this risk, but only if both sides know what to address. 1. Why ADA Compliance Belongs in Every Commercial