Leslie Mark Gammill

san jose estate planning attorney leslie mark gammillThe firm's principal, Leslie Mark Gammill, is a Certified Specialist in Estate Planning, Probate & Trust Law, and has been working in the legal field since 1988. She began practicing law in 1999, and she opened her own law practice in August, 2013. During her career, Leslie has worked for a breadth of clients, on a wide variety of cases. Currently, Leslie's practice focuses on estate planning, probate and trust administration. In her practice, Leslie often assists clients after a loved one has passed away. Leslie helps her clients navigate the confusing and often complex rules that apply to probate and trust administration, including property transfer, asset valuation and allocation, asset sales, and tax planning. Leslie gives expert advice to her estate planning clients by drawing on her experience with estate administration. Leslie prides herself on her high ethical standards and her ability to explain the law applicable to a particular client's situation in a manner that is easily understood.



  • Juris Doctor, U.C. Hastings College of the Law 1999
    Admitted to Practice in California: December, 1999 (Bar No. 204167)
    Certified Specialist in Estate Planning, Probate & Trust Law
  • B.A., Political Science, U.C.L.A. 1993 (Magna Cum Laude)
  • California Notary Public



  • California State Bar Association
  • San Mateo County Bar Association



Our Clients Say...


"Our family hired Leslie Mark Gammill to administer a very complex estate for our uncle.  Leslie was masterful at using the whiteboard to help us understand the intricate process, the plan of action and the order in which items needed to be completed.  Leslie is a skillful attorney with strong advocacy and communication skills. Her updates were clear and concise with attention to detail.  Leslie is a wonderful and delightful professional to work with."

- Lynn B. (July 2023)


"Leslie Mark Gammill has been handling my affairs for 20 years. I have complete faith in her. She is very professional and takes a personal interest in all that she does. She has always been available whenever I needed her. She gives me a sense of security. She has become a very valued friend as well as my valued Attorney."

- CC (April, 2022)


"Any chance that I get to work with Leslie is a treat. Her knowledge of real estate law & estate planning law is comprehensive and impressive. She makes you feel like a team partner and colleague whenever doing deals together."

- Charlene M. (November, 2022)



I have worked with Leslie for many, many years. She helped create my original Trust and has been very helpful over the years on Trust-related issues. She has done an excellent job, and has always explained things very clearly. When my wife passed away several years ago the Trust worked as planned with no surprises. I recently got remarried and wanted modifications, including some requiring a court order. Leslie helped me navigate the complex set of options and we settled on an approach that met my requirements and was quickly approved by the court. I highly recommend Leslie.

- Jim M. (April, 2021)



I would highly recommend Leslie Gammill to anyone dealing with Estate and/or Probate issues. She was efficient, supportive and extremely helpful in getting me, as an absentee executor, through the California probate process. She was a great communicator and thoroughly and effectively handled every aspect of the process often going above and beyond. She is a true professional, knows her stuff and will exceed your service expectations - a perfect attorney to have on your side for what can be a complicated process.”

- Lee T. (March, 2021)



We want to thank you for your professionalism, kindness, respect and consideration. We know it is your job and way of living, but you do it from your heart with patience and understanding.  Once again, sincere thanks, God bless and we are happy that our paths had crossed.

- William & Othelia I.



Leslie Mark Gammill was a life-saver for me. A relative died unexpectedly and, as his oldest surviving relative, it fell to me to deal with the aftermath of this loss. I knew no one in California, but through a bit of very good luck and networking by a lawyer friend, Leslie became my estate lawyer to help sort everything out. And she was amazing. She guided me clearly in what it was I needed to do… what to save, what to throw. She found resources that I needed in order to clear out his apartment… movers, paper shredders, an environmental clean-up person, as well as finding a person who was willing to function as the executor to deal with the rather large mess that had been left in my lap.

She went above and beyond in her assistance to me, including taking on dealing with cars herself. I couldn’t have asked for a better lawyer, even if this hadn’t been such a difficult situation. Totally professional, kind, thoughtful, responsive to my questions and concerns…. I would recommend her without hesitation to anyone seeking a lawyer to handle estate affairs.  And, I remain eternally grateful to her.

- Mary Jane F. (Dec., 2018)



Leslie Gammill recently helped us with our estate preparation. She was not only highly competent and professional in all regards, but also warm, empathetic, and patient. Her fees was very reasonable, especially in light of how much time she spent explaining all of the provisions in our document and making sure that the documents would accomplish exactly what we wanted. She merits our highest recommendation.

- Judy & Lee R. (March, 2018)



"I just wanted to express my thanks for all of your hard work settling the estate of my late husband.  I really appreciated how you took the time to explain everything to me, and the way that you handled everything so professionally.

When I originally came to you, it was a very confusing time for me, after losing my husband so suddenly.  The way you showed respect for both me and my situation really put my mind at ease and made the whole process much easier for me.

I'm so grateful for all of your attention to the details of my case, and I'm very pleased with the results.
Thank you again, so much!"

- Rosa S.



"I have had the privilege of knowing Leslie Mark Gammill for the past 7 years, during which time I have had to engage her services for professional assistance and guidance concerning Real Estate and Trust Management matters.

She has always been easily accessible and influential in providing me with the knowledge and direction that is necessary, and she provides these in a very timely manner.

If necessary, she does not hesitate to consult with her peers in an effort to provide the best information to her clients so that there is no room for oversight or error.

Her services are cost effective and she is detailed in her thinking and fact finding.

She has gone beyond the call of duty to assist her clients with the information that they need, so that their experience will be fundamentally easy and smooth.

I therefore have no hesitation in recommending her highly for the service that she provides to the public and would be honored to engage her services again in the future if it becomes necessary."

 - Angelica E.



"Our relationship with Leslie began with the passing of our brother. As we live out of state, we needed an attorney who could handle the estate as smoothly as possible. Leslie was recommended to us and she was the perfect attorney for our needs. Leslie took all of the stress and worry away by providing us with complete and thorough details of each step of the process in a very timely manner. She was always there for us.

Her knowledge of probate matters and her compassion makes her an excellent attorney for estate planning. It was truly a pleasure to work with someone who is so trustworthy. We highly recommend Leslie to anyone for pre or post estate issues"

- Larry P.



“Words cannot express how grateful I am to Leslie Mark Gammill for her sincere compassion and legal assistance during a life changing time in my life.

Leslie's level of expertise and professionalism surpassed my expectations. No matter the time, or the importance of my questions, every phone call and e-mail was promptly and personally returned. As each different issue arose Leslie was there with me giving practical advice and necessary information to allow me to make some very difficult, but informed, decisions. She never lost her patience, despite my frequent and overwhelming inquiries.

I am extremely pleased with the end result of my year-long legal battles with family and I would highly recommend Leslie to anyone without any hesitation."

- Lori H.



"We have had the pleasure of working with Leslie Mark Gammill on two separate occasions. Our first experience involved creating a trust for my elderly uncle and the second was to bring my parents’ very outdated trust up to date. From the beginning, Leslie listened to our concerns, pinpointed our needs and came up with answers. Leslie demonstrated her impressive scope of expertise developing customized solutions in an array of difficult areas with precision. She was meticulous in her attention to detail and when she didn’t have immediate answers to our questions, she made sure she researched extensively for the right answers. She was very supportive throughout the entire process, explained each and every page of the documents in detail and set everyone’s mind at ease. We have no doubt she will be just as supportive when we need her."

- Lori K.



"I am pleased to say that Leslie Mark Gammill has been our family's attorney for over 15 years. She has advised, created, amended and administrated multiple trusts for a complex family, which is not an easy achievement.  It can be a strange thing to plan for when you are no longer here or to facilitate a trust of a loved one you've just lost. However, given our experience with Leslie we now cannot imagine doing any of this without her. We are grateful for her compassion, ease of communication, experience with estate issues along with her sound judgment and reassuring guidance. She is professional and ethical. She listens to her clients' needs and undoubtedly understands the challenges that can arise while administrating a trust during difficult times. Her proactive approach to estate planning along with her extensive experience can remedy potential issues long before they arise while making an arduous process as smooth as possible.

We don't know what life has in store for us, but I am completely confidant and reassured knowing Leslie is in our corner and just a phone call away. It is my great pleasure to highly recommend Leslie Mark Gammill for any and all estate planning, probate and trust administration."

- Jill M.




Our Colleagues Say...


To Whom it May Concern,

We are residential realtors serving San Mateo and Santa Clara Counties. We recently concluded an extremely complicated escrow in which we had the distinct pleasure of collaborating with Leslie Mark Gammill, Law offices of Leslie Mark Gammill, for the benefit of our mutual client. Leslie’s vast understanding of the probate and Guardian ad litem process made a most challenging real estate transaction seem far easier than it would have been without her involvement. She also very subtly turned the transaction into a fast-paced educational experience with significant future value to us as realtors. She demonstrated unbelievable compassion for our client while also being willing to have those hard-to conduct reality based conversations with the client. Her ability to quickly grasp the ever-changing landscape and the typical nuisances of the real estate business allowed for a very easy to navigate communication process.

For anyone seeking estate-planning consultation or in need of trust administration, probate or conservatorship legal services, we most heartedly recommend the law offices of Leslie Mark Gammill. You will quickly realize you made the right decision and be most happy you did. Should you wish to conduct a personal conversation relative to our experience with Leslie, please simply ask her for our contact information.

- Bob & Kat Bedbury, Bedbury Realtors in association with Today Sotheby’s International Realty



"I have known Leslie Mark Gammill for over 15 years and have never hesitated refering my clients who are in need of Estate Planning, Trust Administration or Probate services. Leslie is a reputable, knowledgeable and trustworthy Attorney.   

Recently, a good family friend needed her professional help due to the unexpected death of her spouse. There was no will and Leslie not only came to her but was able provide in-depth and up-to-date knowledge of current probate laws specific to her situation. Leslie has shown she's professional, compassionate and a great listener. She was able to explain the probate process and answer questions in a way that made everyone involved feel at ease.  

I cannot say enough complimentary things about Leslie. Not only do I like her as a person, I wouldn't hesitate putting my name behind hers and referring all my future clients, friends and family members to her."

- Jaime Gonzalez, Broker/Owner, RE/MAX MID-PENINSULA



"Leslie is an outstanding trust attorney in every way. In our initial meeting, she was the best listener and understood our specific needs. She was also an excellent teacher in helping understand the steps needed in creating our trust. When presenting the draft, she took the time to make sure we comprehended the contents of the material. Today, we got our estate planning binder. It was incredibly organized and comprehensive. Leslie is beyond excellent and I would highly recommend her to anyone in need of a specialist in estate planning, probate and trust law."

- Jeff Holman, Today Sotheby's International Realty



2542 S. Bascom Ave., Suite 295
Campbell, CA 95008
New Phone: (408) 898-2100
New Fax: (408) 898-2122
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