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Sean Michael Lazzari

Sean Michael Lazzari

Practice areas:

Divorce & Separation, Child Custody, Real Estate, Wills & Living Wills, Child Support, Criminal Defense

About Me

Welcome to the Law Offices of Sean M. Lazzari. Sean has been serving the legal needs of individuals such as yourself since 1982. Being centrally located in Oak Brook, Illinois, the office is easily accessible to the different court locations in Cook County, DuPage County, Will County and Kane County.  Being a suburban lawyer I am able to offer you highly professional services at a below market Chicago based rate. 

My reputation in the community is that of an experienced seasoned attorney who always puts the interests of his client first.  I am known for handling the difficult case with many of my cases being referred to me from other attorneys who have already started the case or who choose not to take such a difficult case.  I am known as an aggressive attorney who will fight for the rights of his clients. 

I am also a trained divorce mediator who has been approved for mediation services in Cook and DuPage counties.  Utilizing the latest in legal methods and software my office will work together with you to ensure that your legal rights are protected. 

Sean is a US Army veteran, having served with the First Armored Division in Ansbach, Germany. After being honorably discharged from the Army, Sean graduated with Honors from the University of Illinois. He then taught United States History at Lyons Township High School in La Grange, Illinois before returning to get his Juris Doctor Decree from Southern Illinois University.

Over the years Sean has been a member of the Illinois State Bar Association, the American Bar Association, the DuPage County Bar Association, and the Cook County Bar Association. In addition Sean has served on local school boards and has been active in youth athletics for over twenty years. Sean is currently licensed to practice law in the State of Illinois,the United States District Court for the Northern District of Illinois, and the Seventh Circuit Court of Appeals.

It is from these diverse interests that Sean has gained the experiences necessary to assist you with your legal needs. Please call the office at 630-571-3360 or email us via the contact form to the left to set up an appointment to assist you with your legal questions and problems.


Photos and Videos

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Practice Areas

Licensed since 1982

  1. Divorce & Separation: 50%
    34 years, 1 thousand cases
  2. Child Custody: 20%
    34 years, 1 thousand cases
  3. Wills & Living Wills: 10%
    34 years, 1 thousand cases
  4. Real Estate: 10%
    34 years, 1 thousand cases
  5. Other: 10%
  6. More 



Hourly ($300-400/hour), Fixed (Sometimes), Free Consultation (45 minutes), Pro Bono (2%)

Payment Types:

Cash, Check, Credit Card

Attorney Endorsements

6 total 

  • Wesley C Zaba

    I worked as opposing counsel on a divorce case with Sean. He was honest, knowledgeable, and represented his client's interests. I hope to work with him again in the future.


    Wesley Zaba Real Estate Attorney
    Relationship: Opposing Counsel on matter

  • Douglas MacMillan Borthwick

    I endorse this lawyer.


    Douglas Borthwick Family Attorney
    Relationship: Fellow lawyer in community

Contact Info

Sean M. Lazzari Attorney at Law

800 Enterprise #204
Oak Brook, IL, 60523-4217


ILActive And Authorized To Practice Law198205/14/2015

Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
Pro Bono Service Award DCBASean M. Lazzari2012

Work Experience
TitleCompany NameDuration
AttorneyMalek & Associates1982 - 1984
Law ClerkCity of Carbondale1980 - Present
TeacherLyons Township High School1977 - 1979
Information SpecialistUnited States Army1972 - 1974

Association NamePosition NameDuration
West Suburban Bar AssociationN/A2010 - Present
DuPage County Bar AssociationMember1984 - Present
Illinois State Bar AssociationMember1982 - Present
Chicago Bar AssociationMember1982 - Present

Legal Cases
Case NameOutcome
Marriage of AuriemmaAppellate Ruling in Favor of Client

See all Legal Cases 

Publication NameTitleDate
Illinois Second District Appellate CaseMcClure v. Sennstrom, 267 Ill. App. 3d 277, 205 Ill. Dec. 20, 642 N.E.2d. 885 (2d Dist. 1994)1992

School NameMajorDegreeGraduated
Southern Illinois University School of LawLawJD - Juris Doctor1982
University of Illinois, Urbana-ChampaignHistory/PhilosophySecondary Education Social Studies1977
Muskegon Community CollegeSocial StudiesAssociate in Arts1975