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About Me

John M. Mavroudis is Senior Parter of the firm and Chair of our Real Estate group.  With over forty years of experience as an attorney, real estate developer and businessman, John offers his clients a comprehensive approach to all residential and commercial real estate matters, including acquisition, land use and development, finance, capital placement, construction, residential and commercial transactions and complex workouts.

He has participated in extensive litigation on behalf of developers in connection with zoning and land use matters, complex title issues and related matters, including interpretation of deed restrictions, mortgage provisions, adverse possession, foreclosures, survey disputes, ECRA, environmental, riparian rights and other title matters. He has been involved in reported decisions of the Superior Court of New Jersey, Appellate Division and New Jersey Supreme Court involving land use and related issues.

John M. Mavroudis is perhaps best known as the founder, owner and chief executive of Rio Vista; New Jersey's preeminent luxury real estate development company.  He has developed over $1 billion dollars in residential and commercial properties, including over 1,000 acres and 500 homes.  Rio Vista has pioneered upscale residential communities, created significant values and transformed municipalities in Bergen County including Alpine, Cresskill, Mahwah and Norwood.

In 1972, John began his career as an associate with the Wall Street firm, Patterson, Belknap Webb & Tyler LLP.  Thereafter, he continued in private practice with his own firms to the present time and developed substantial expertise and recognition in the area of real estate law and practice in the State of New Jersey. He has consistently placed among the top rated attorneys in his field.

John is admitted to practice in New York, New Jersey, Florida and the United States District Court for the District of New Jersey.  He received his Juris Doctor cum laude from Syracuse University College of Law in 1972 where he was an editor of the Syracuse Law Review.  He is also a retired captain in the United States Army Reserve and a recipient of the Ellis Island Medal of Honor.


Languages Spoken: Greek, English

Photos and Videos

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Practice Areas


  1. Real Estate: 80%
    2 years
  2. Land Use & Zoning: 10%
    2 years
  3. Litigation: 10%



Fixed (Sometimes), Retainer (Sometimes)

Payment Types:


Attorney Endorsements

2 total 

  • Nataliya I. Gavlin

    I endorse this lawyer.Excellent attorney with a great level of professionalism and experience.


    Nataliya Gavlin Immigration Attorney
    Relationship: Fellow lawyer in community

  • Christian K. Lassen II

    I endorse this lawyer.


    Christian Lassen Personal Injury Attorney
    Relationship: Fellow lawyer in community

Contact Info

Mavroudis & Guarino, LLC

690 Kinderkamack Road
Oradell, NJ, 07649

Mavroudis & Guarino, LLC

630 Fifth Avenue
New York, NY, 10111

Mavroudis & Guarino, LLC

28-06 Ditmars Blvd
Astoria, NY, 11105



NYCurrently registered 197303/13/2015
FLMember in Good Standing - CLER Exempt197209/08/2015

Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
Who's Who in American LawWho's Who In American Law2015
BV RatedMartindale-Hubbell2014
Who's Who in American LawWho's Who In American Law2014
BV RatedMartindale-Hubbell2013
Who's Who in American LawWho's Who In American Law2012
BV RatedMartindale-Hubbell2012
BV RatedMartindale-Hubbell2011
Who's Who in American LawWho's Who In American Law2011
Who's Who in American LawWho's Who In American Law2010
BV RatedMartindale-Hubbell2010
BV RatedMartindale-Hubbell2009
Who's Who in American LawWho's Who In American Law2009
BV RatedMartindale-Hubbell2008
BV RatedMartindale-Hubbell2007
Who's Who in American LawWho's Who In American Law2005
Who’s Who in AmericaWho's Who in America2004
Who's Who in American LawWho's Who In American Law2004
BV RatedMartindale-Hubbell2003
BV RatedMartindale-Hubbell2000
Ellis Island Medal of HonorEllis Island1999
BV RatedMartindale-Hubbell1998
BV RatedMartindale-Hubbell1995
BV RatedMartindale-Hubbell1990
Who's Who In American LawWho's Who In American Law1988
Who's Who in American LawWho's Who In American Law1984
MemberJustinian Society of Lawyers1972
Work Experience
TitleCompany NameDuration
PartnerMavroudis & Guarino, LLC2011 - Present
Chief Executive OfficerRio Vista Companies1977 - Present
General CounselGreek Orthodox Archdiocese of America1997 - 1999
PartnerMavroudis & Rizzo, PA1990 - 2011
PartnerKlinger, Nicolette, Mavroudis & Honig, PA1983 - 1990
PartnerNicolette & Mavroudis, PA1981 - 1983
PartnerLaw Office of John M. Mavroudis1977 - 1981
AssociatePatterson Belknap Webb & Tyler1972 - 1976
CaptainUnited States Army Reserves1970 - 1976
Association NamePosition NameDuration
Syracuse University College of LawBoard of Advisors2005 - 2011
Order of St. Andrew the Apostle of the Ecumenical Patriarchate of ConstantinopleArchon Notarios1980 - Present
New York City Bar AssociationMember1972 - Present
School NameMajorDegreeGraduated
Syracuse University College of LawLawJD - Juris Doctor1972
City University of New York, Queens CollegeN/AN/A1969
New York University School of LawTaxationN/AN/A