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Kelly Mattheiss

  • Family Law, Landlord Tenant, Construction Law ...
  • New Jersey
Claimed Lawyer Profile

As a practicing attorney for thirty years, I have been privileged to work with clients in a variety of areas. Having served as a judicial law clerk in the family court, I have a long standing appreciation for the issues and circumstances clients face in matrimonial matters. I approach each case with a desire to provide a clear path towards resolution, while purposefully advocating for the best outcome for my clients. I am a strong proponent of alternate dispute resolution and have successfully mediated matrimonial cases.

I bring the same passion and commitment to all matters I handle, whether they be landlord tenant, collection, construction, commercial/residential real estate or civil or estate litigation cases.

I enjoy practicing law. It was always my desire to be an attorney and I feel privileged and honored to serve in this capacity.

Practice Areas
Family Law
Child Custody, Child Support, Father's Rights, Guardianship & Conservatorship, Prenups & Marital Agreements, Same Sex Family Law
Landlord Tenant
Evictions, Housing Discrimination, Landlord Rights, Rent Control, Tenants' Rights
Construction Law
Construction Contracts, Construction Defects, Construction Liens, Construction Litigation
Real Estate Law
Commercial Real Estate, Condominiums, Easements, Eminent Domain, Homeowners Association, Land Use & Zoning, Mortgages, Neighbor Disputes, Residential Real Estate, Water Law
Jurisdictions Admitted to Practice
New Jersey
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Professional Experience
Judicial Law Clerk
Superior Court of New Jersey
Served as Judicial Law Clerk to the Honorable John J. Harper, J.S.C., Family Part, Morris County
Seton Hall University School of Law
J.D. (1987)
Matriculated in the four year evening program.
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Seton Hall University
B.S. (1982) | Accounting
Honors: Graduated Magna Cum Laude; Accounting Honors Internship Program
Activities: Member of Beta Gamma Sigma Business Fraternity; Member of Beta Alpha Psi Accounting Fraternity
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Professional Associations
Essex County Bar Association
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Matrimonial Early Settlement Program
- Current
Activities: Assist attorneys and their clients in reaching mutually agreeable settlements of their matrimonial cases.
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New Jersey State Bar Association
- Current
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District V-B Ethics Committee
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Contact & Map
Sullivan & Mattheiss, P. C.
101 Vose Avenue
South Orange, NJ 07079
Telephone: (973) 275-1800