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Nancy Encarnacion Mass

Attorney Profile

Top Rated Family Law Attorney in San Mateo, CA

Berra Stross Wallacker & Mass
411 Borel Ave, Suite 550
San Mateo, CA 94402
Phone: 650-212-7861
Fax: 650-349-9907
Selected to Super Lawyers: 2017 - 2021
Selected to Rising Stars: 2011 - 2016
Licensed in California Since: 2003
Practice Areas: Family Law
Languages Spoken: English, French, Spanish
Attorney Profile

Nancy Encarnacion Mass is a partner at Berra Stross Wallacker & Mass, where she focuses her practice exclusively on family law matters. Working out of the firm's office in San Mateo, California, she represents clients in the San Francisco Bay Area, including San Mateo and Santa Clara counties. Admitted to practice before all California state courts since 2003, Ms. Mass is also admitted to practice before the U.S. District Courts for the Northern and Central Districts of California.

The primary portion of Ms. Mass’s client base is comprised of people whose marriages are coming to an end and who are thus having to deal with such divorce-related issues as the division of complex assets and debts, spousal and child support, and child custody and visitation. A forceful courtroom advocate when litigation is necessary, her experience in negotiations and mediation often allow her to help many of her clients reach an agreement through the use of those methods of alternative dispute resolution. In addition to her divorce practice, Ms. Mass works with people whose marriages have already been legally dissolved and who are now seeking the enforcement of existing parenting and support orders. Her family law experience has also encompassed the preparation and review of prenuptial and post-marital agreements, and she has helped domestic violence victims seek appropriate protective orders. Her successful track record, along with the manner in which she handles what are often sensitive matters, has earned her a great deal of recognition from her peers, including a “Superb” peer review rating through Avvo.

Ms. Mass received a Bachelor of Arts cum laude from the University of California, Los Angeles, in 1998. She is a 2003 graduate of the University of California, Hastings College of the Law, and she has been certified as a specialist in family law by The State Bar of California's Board of Legal Specialization.

Practice Areas
  • 100%Family Law
Focus Areas

Alimony & Spousal Support, Child Support, Custody & Visitation, Dissolution, Divorce, Domestic Violence, Paternity, Prenuptial Agreements, Marital Property, Same Sex Family Law


5 Years Super Lawyers
6 Years Rising Stars
  • Super Lawyers: 2017 - 2021
  • Rising Stars: 2011 - 2016

About Nancy Encarnacion Mass

First Admitted: 2003, California

Professional Webpage:

Educational Background

  • University of California at Los Angeles, B.A., Honors: Cum Laude, Major: English and French, 1998


  • American Academy of Matrimonial Lawyers, Fellow
  • Northern California Super Lawyer, Super Lawyers Magazine, 2011 - 2019

Special Licenses/Certifications

  • Certified Specialist in Family Law

Pro bono/Community Service

  • Co-Chair of the Family Law Section of the San Mateo County Bar Association, 2011
  • Chair of the Family Law Section of the San Mateo County Bar Association, 2012
  • Pro bono attorney handling cases for the Legal Aid Society of San Mateo County, Domestic Violence Collaborative
  • Member of the Diversity Committee of the San Mateo County Bar Association (2017-2020)
  • Volunteer for Department 15 of the San Mateo Superior Court, Family Law Status Conference Calendar

Bar/Professional Activity

  • Santa Clara County Bar Association
  • Bar Association of San Francisco
  • American Academy of Matrimonial Lawyers, Northern California Chapter
  • San Mateo County Bar Association
  • Association of Certified Family Law Specialists
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Office Location for Nancy Encarnacion Mass

411 Borel Ave
Suite 550
San Mateo, CA 94402

Phone: 650-212-7861

Fax: 650-349-9907

Last Updated: 6/25/2021

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