O'Brien Law PC is a private multi-practice law firm that serves both residential and commercial clients from Boulder and the surrounding areas. It provides legal counsel and representation for a wide range of real estate matters, including acquisitions, development, management, financing, and leasing. Its clients include homeowners, homeowners' associations, tenants, landlords, and property developers. Founding partner Fern O'Brien has been practicing law for almost three decades. She serves as the vice-president of the Boulder County Estate Planning Council.