About Mendes Weed, LLP

Driven by a shared passion to help individuals, families, and businesses, Mendes Weed, LLP assists clients as business, tax, trust, and family law attorneys in the San Francisco Bay Area.



Christina Weed, Walnut Creek Attorney

Christina Weed – Partner

Christina’s determination and knowledge make her a strong advocate for her clients and she aggressively defends their rights. She helps her clients better understand the law and ensure that it is being best applied to their situation.

Christina is a licensed attorney with an LL.M. in Taxation from the University of San Diego and a Bachelor’s Degree in Accountancy. She serves as Chair of the Tax Section of the Contra Costa County Bar Association and is also a member of the Estate Planning Council Diablo Valley and the Tri-Valley Estate Planning Council. Christina has also written, or been featured in, several publications.

In 2018, Christina became one of the first lawyers to argue a case in front of California’s Office of Tax Appeals. Mendes Weed, LLP is one of only a handful of law firms to have gone before the OTA because the OTA has only been hearing cases since January of 2018.

Christina has been designated a Certified Specialist in Taxation by the State Bar of California. 

Christina Weed - Taxation Law Specialist
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Lisa J. Mendes

Lisa J. Mendes – Partner

Lisa is also known for her aggressive defense of her clients as well as her knowledge of the law and how it pertains to their situation. She advocates for the rights and well-being of her clients and that of their children and the elderly. She has a reputation for being a very fair negotiator and communicator with other lawyers and judges, which streamlines and expedites the process.

Lisa acts with compassion and understanding while detailing in great depth the reality of the legal process and true expectations of the court process. She hopes that by being open and honest and communicative, her clients can move past this often difficult and emotional process efficiently to live the life they were meant to lead.

Lisa is a licensed attorney, with a Master’s Degree in Business Administration (MBA), and a Bachelor’s Degree in Spanish Language and Literature. She has litigated multiple bench and jury trials in civil and criminal court for the Mendes Weed law firm. Lisa is an active member of the Contra Costa County Bar Association (CCCBA), specifically in the Family Law, Women’s, Tax, and Estate Planning Sections. Lisa has written multiple articles for the Contra Costa Lawyer Magazine. She is a member of the Robert G. McGrath Inn of Court. Lisa advocates for proposed legislation and new laws as a member of the Contra Costa County Delegation of the California Conference of Bar Associations.

Lisa J. Mendes
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Heather Biddle – Associate

Heather is a veteran family law litigator of over 15 years and vigorously defends her client’s interests both in and out of court. She approaches clients and their cases from a holistic point of view, knowing that each issue in a case does not exist in a vacuum, particularly in family law. Heather is experienced enough in that if she feels a case need not go to trial, she is confident in her skills to be able to settle it outside of court, but if there is no other path, then Heather flexes her courtroom skills. She enjoys litigating with the best of them. She is able to craft settlements that are creative and meet the needs of the clients, refusing to impose boilerplate mandates. Each family law case is as unique as its parties. No one approach can be used for all cases and she adheres to that philosophy. Heather will protect your interests and support you along the way.

In addition to working as a family law attorney, Heather has also worked as a Federal Law Clerk for the Sixth Circuit Court of Appeals, a Family Law Facilitator, a college instructor, a social worker, and a mental health therapist. She graduated from the University of Cincinnati with a Bachelor’s degree in Social Work and from the University of Dayton School of Law. She originally is from Cincinnati, Ohio but identifies California as her home. In her spare time, Heather is involved in soccer, stand-up comedy, and loves history.

Richard Rose

Richard Rose – Associate

Richard joined Mendes Weed, LLP after attending JFK University and being admitted to the California Bar.

At JFK University he was active in Student Government, participated heavily with the Housing Advocacy and Elder Law clinics for almost two years. He also served as the Student Section Leader for the Contra Costa County Bar Association. He interned at firms specializing in family law, personal injury, and estate planning.

Richard Rose is a Bay Area native, born in Sonoma, raised in Alameda County, and now living in Contra Costa. He has been an entrepreneur since his teen years, mostly in the automotive and mortgage banking industries. He is bilingual, having learned Spanish in his 20s while in Mexico. He enjoys playing guitar and keeping fit by training in CrossFit and Muay Thai. Richard spent three years with the Contra Costa County Sheriff’s Search and Rescue Team.

Administrative Staff

Martha Prempeh

Martha Prempeh – Senior Paralegal

Martha Prempeh received her Juris Doctor degree from the University of Michigan Law School. Martha was actively involved in the Black Law Students Association (BLSA) during law school, and served as Secretary of the organization. Martha also graduated with a Bachelor of Arts degree in Political Science from the University of California, Berkeley. At UC Berkeley, Martha was President of the Black Pre-Law Society and a member of Phi Alpha Delta. Martha’s enthusiasm for family law stems from her passion for justice and gender equity.

Previously, she has worked as an extern for the Superior Court of California, as a legal researcher at the University of Michigan Business School, and as a legal assistant for the Law Office of William Spain. Martha has also been an entrepreneur, specializing in college and graduate school admission consulting.

Martha grew up in the Bay Area, and currently lives in Alameda County. Martha speaks French fluently. Her hobbies include watching cooking shows, reading, traveling, trying new restaurants, and spending quality time with family and friends.

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Walnut Creek Main Office

1990 N. California BLVd.
Suite 1020
Walnut Creek, CA 94596

San Jose Office

SAN JOSE, CA 94607

Santa Monica Office

1620 26th Street

Oakland Office

66 Franklin Street
Suite 300
Oakland, CA 94607


Toll Free

(833) 695-2922

Culver City Office


San Francisco Office

95 Third Street
2nd Floor
San Francisco, CA 94103

Truckee Office

12242 Business Park Drive
Suite 19
Truckee, CA 96161

Irvine Office

17875 Von Karman Ave
Suites 150 and 250
Irvine, CA 92614