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Mary K. Piasta

Estate planning Attorney at Sonoma, CA

5.0   3 reviews

also known as Mary K. Piasta-Valluzzo

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About Mary

Learn Mary’s areas of practice.

Practice areas
  1. Estate planning
    A good attorney will also adjust your estate plan so that it minimizes taxes and eliminates court costs and interference. You can create a legally binding document that ensures that you have control of your finances, taxes, and medical plans.

  2. Elder law
    Elder law attorneys and elder care lawyers deal with issues related to elderly and disabled people. They write wills, answer tax questions, and plan strategies for obtaining disability, Social Security, Medicaid, and Medicare payments.

  3. Trusts
    Search Results Featured snippet from the web Image result for why hire a trust attorney The work involved in setting up a trust is far more complicated than simply creating a will.

  4. Wills and living wills
    A Will attorney can assist you and your family with Drafting the Will; Assisting your family to ensure your wishes are carried out; Aiding in any legal proceedings should the need arise.

  5. Real estate
    A real estate attorney can stop or mitigate a foreclosure, defend you if a real estate transaction goes wrong, or represent you as a tenant or as a landlord in cases of property damage.

From real estate to estate planning, Mary provides peace of mind to her clients through proactive representation. As such, she has helped companies both aged and new. Her clients include businesses of all sizes from the growing food business to multi-generational wineries and vineyard management companies.

Loving helping individuals and families, she provides full spectrum of advice to her clients enabling local clients to meet their goals be it building a business or maximizing their estates for future generations.

Having been involved in complex litigation for thirteen years including the top real estate jury verdict in the state for 2014, she counsels clients on the issues faced there.

Desiring to preserve Sonoma's historic nature, she is a board member of the Sonoma Valley League for Historic Preservation. Committed to children's issues, sits on the boards of the Kenwood Education Foundation and the Ama Foundation. She has served on the Sonoma Community Service and Environment Commission as well as the board of the Sonoma Valley Mother's Club.

An Alum of the Governor Gray Davis Administration, she aided the First Lady. She earned degrees from UC Davis and USF School of Law. During law school, she clerked at Cotchett, Pitre & Simon (now Cotchette, Pitre & McCarthy). In her spare time, she lobbied successfully for policies affecting the rights of children at the UN Women's Commission.

She and her husband feel blessed to call Sonoma Valley home, where they live with their two sons and pet tortoise.

Photos and videos

Licensed for 19 years
State CA
Status Active
Acquired 2003
Updated 11/30/2022

We have not found any instances of professional misconduct for this lawyer.

Contact Mary

Similar lawyers nearby

Haeuser, Valluzzo & Piasta LLP
466 First Street East
Sonoma, CA, 95476


5.0 / 5.0
  3 customer reviews
5 Star
4 Star
3 Star
2 Star
1 Star
Posted by Meredith | April 6, 2018
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
Law services with a smile
Mary is such a pleasure to work with and she has helped me grow my business over the last few years with solid advice and legal help. Running my small business that is customer service oriented requires needing assistance in rewriting contracts, down to addressing individual concerns as they pop up. Her positive attitude and warmth combined with her willingness and availability to help has been a piece of mind. I always recommend her to others!
Read less
Posted by Ramie | March 23, 2018
This review is from a person who hired this attorney.
| Hired Attorney
Highly Recommend!
Mary is action-oriented, honest, and warm. She has helped us in many facets of starting a new business from Estate Planning to Contract Negotiation and more. She has continually provided us with clear direction, honest feedback, and things we should consider. Her warmth makes her easy to work with and her professionalism makes her a valuable person to work with.
Read less
Posted by Laura | March 22, 2018
This review is from a person who hired this attorney.
| Hired Attorney
Everything from Business to Personal Law
Mary has helped me on a range of different projects. Mainly, she was masterful at setting up business contracts and licenses. She researched and compiled contracts specific to my profession. As a client, I appreciate the way she brings her expertise to bear on tough issues. She is always available to offer advice as well as diving in to solve unforeseeable circumstances. If you're looking for an advocate, Mary is the attorney for you!
Read less


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Contact for Details


AVVO RATING 7.9 (Very Good)


  • University of San Francisco School of Law
  • JD - Juris Doctor
  • 2003
  • University of California - Davis
  • BA - Bachelor of Arts
  • 1999


  • Sonoma Valley League for Historic Preservation
  • Board Member
  • 2017 - Present
  • Kenwood Education Foundation
  • 2017 - Present
  • Sonoma County Bar Association
  • N/A
  • Ama Foundation
  • Board Member
  • N/A
View all associations

Languages Spoken

  • English

Honors and Awards

  • Sonoma Star
  • Valley of the Moon
  • 2018


  • Aspatore Book publication
  • Inside the Minds: Elder Law
  • 2015

Speaking Engagements

  • Estate Planning
  • Tools for Life
  • 2020

Attorney endorsements

Received (1)
Given (1)
Endorse Mary
Litigation Attorney | May 15
Relationship: Worked together on matter
"Mary and I have worked together on an inter-state collection matter. The underlying case is very complicated, and I am very impressed with your skill, knowledge, and ability to keep focus on the big picture. I am sure her clients love working with Mary, as she is easy to work with, and down-to-earth. I wholeheartedly endorse her."
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Avvo Contributions

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Sonoma Estate planning Lawyer Mary K. Piasta
Mary K. Piasta
Estate planning Attorney
Sonoma, CA
Licensed for 19 years