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Stephen Isaac Gassner

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About me

Growing up in the Gassner family meant listening to, metabolizing, and learning the Family Law business.  With 21 years experience as a licensed attorney, Mr. Gassner has seen and managed practically every sort of family law matter that arises - from business valuation to domestic violence, and everything in between.  Although we prefer to handle simple matters, we are also well prepared for more complex ones.  From the certified paralegals to Mr. Gassner, who has the encyclopedic knowledge of substantive, procedural, and practical California Family Law, 


Practice areas


  1. Domestic Violence: 35%
    21 years
  2. Family: 25%
    21 years
  3. Divorce: 25%
    21 years
  4. Child Support: 15%
    21 years



Hourly ($110-350/hour), Retainer (sometimes), Free consultation (30 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

8 total 

Are you an attorney? Endorse this lawyer

  • Christian K. Lassen II

    Top-notch attorney. Highly respected in the legal community.


    Christian Lassen Personal injury Attorney
    Relationship: Fellow lawyer in community

  • Douglas MacMillan Borthwick

    I endorse this lawyer.


    Douglas Borthwick Family Attorney
    Relationship: Fellow lawyer in community

Contact info

Law Office of Stephen Gassner

318 N. Mountain Ave.
Upland, CA, 91786


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Peer Review RatedMartindale-Hubbell2016
Work experience
TitleCompany nameDuration
FounderLaw Office of Stephen Gassner2012 - Present
Of CounselLaw Office of Marc Grossman2011 - 2012
Founding PartnerGassner & Gassner1999 - 2011
Association namePosition nameDuration
State Bar of California, Law Practice Management and Technology SectionBoard of Directors2001 - 2004
California Young Lawyers AssociationBoard of Directors1996 - 1999
California Young Lawyers Association, Technology SubcommitteeChair1996 - 1999
School nameMajorDegreeGraduated
Claremont Graduate UniversityInformation SystemsMA - Masters1997
University of La Verne College of LawLawJD - Juris Doctor1994
Pitzer College (Claremont)Business AdministrationMBA1989
Pitzer College (Claremont)PsychologyBA - Bachelor of Arts1984