Ottosen DiNolfo Hasenbalg & Castaldo, Ltd.

A Legacy of Relationships Built on Trust

Ottosen DiNolfo Hasenbalg & Castaldo, Ltd

A Legacy of Long-Lasting Relationships Built on Trust
american flag hanging in a court house

Ottosen DiNolfo Hasenbalg & Castaldo, Ltd. is dedicated to serving those who serve others: municipalities and other local governments, public pension boards, public safety organizations, and school districts. In addition, the firm represents individuals and business entities in a wide variety of legal matters. Founded in 1992, the firm has the breadth and scope of practice that allows us to develop comprehensive solutions for our clients. Nearly 400 government entities throughout Illinois rely on our attorneys to develop solutions that meet their specific legal needs.

Legal Services for Individuals,
Municipalities & Businesses

Every law firm’s resume speaks of the unwavering commitment of its lawyers to advance the clients’ interests in an intelligent, efficient, and economical way. That was the basis upon which Ottosen DiNolfo Hasenbalg & Castaldo, Ltd. was formed in 1992, and that remains the cornerstone of the firm today.

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Our Offices

Naperville Office

1804 North Naper Blvd.
Suite 350
Naperville, Illinois 60563
Phone: 630-682-0085
Fax: 630-682-0788


Elburn Office

8 South Main Street
Suite C
Elburn, Illinois 60119 
Phone: 630-365-6441 
Fax: 630-365-6451