Keystone Law Group, P.C.

Keystone Law Group, P.C.

Keystone Law Group is a California law firm that primarily focuses on probate, trust & estate litigation & administration. Our attorneys establish personal relationships with our clients to ensure that even the most complex issues can be solved.

Firm Overview

Headquartered in Los Angeles and located in the south Financial District of San Francisco, Keystone Law Group, P.C. focuses on handling legal matters related to probates, trusts, and estates. We understand the legal system can be complex, which is why our attorneys commit themselves to providing effective advice and representation for our clients. At Keystone, our team represents a wide range of individuals, including trustees, executors, beneficiaries, heirs, administrators, guardians and conservators. So whether you have a dispute regarding one's inheritance or you feel an executor is acting in bad faith, our estate planning lawyers are here to help. Contact our firm today for more information on our services and we can begin discussing your rights and options.

Main Office

San Francisco Office
135 Main Street
9th Floor
San Francisco CA 94105


(415) 855-2000


(415) 855-3000


Free Initial Consultation?

Yes, please mention you found us on Nolo

Services Offered For Fixed Fees?

Yes, please call for consultation

Hourly Rates

Varies By Attorney

Office Information

Office Hours

8:30 a.m. - 5:30 p.m.

Office Manager

Biana Kerendian

Emergency After Hours


Other Offices

Main Office
11300 West Olympic Blvd.
Los Angeles


The act of managing one's estate after they have passed can prove to be difficult, especially when disputes arise. By seeking the help of a probate litigation attorney, you can rest assured that your best interests are fully and fairly represented.

When a loved one passes, it is not uncommon for disagreements to arise regarding the management of their estate. Because of this, the legal process can become quite complicated. With the help of a qualified probate attorney, you can begin taking the right steps toward obtaining the resolution you need. At Keystone Law Group, P.C., we make it our mission to effectively represent the rights and interests of our clients. Whether your situation involves disputes regarding asset division, a will's legality, or an executor's status, our probate litigation lawyers have the experience needed to help resolve your case. Don't endure these complex issues on your own, contact our law office today and we can begin discussing the details of your case.

How did your firm decide on the primary area of practice(s)?

The Principal attorney, Shawn had a background in trust and estate preparation and then went on to manage, supervise and litigate hundreds of probate, trusts and estate matters, including trusts and estates valued in excess of $50 million. His passion for this field of law led to his desire to create a law practice dedicated to providing focused and efficient legal services in the probate, trusts and estates fields of law.

What experience or education distinguishes your lawyers from others?

As a specialist in Estate Planning, Probate, and Trusts Law certified by the State Bar of California, Board of Legal Specialization, founder Shawn S. Kerenidan sets himself apart from other lawyers by making his clients his priority and catering to their every need and interest. The remaining Keystone attorneys further strengthen the firm by broadening their knowledge and staying current with the evolving laws, rules, and procedures of estate planning. By doing this, the entire Keystone Law Group, P.C. team is adequately equipped with the experience needed to handle even the most difficult of legal matters. Having gained respect and recognition from surrounding attorneys and judges, we have quickly established ourselves as one of the most distinguished probate litigation firms in California.

What distinguishes your law firm from others?

By focusing on a single area of practice, our attorneys are able to provide our clients with the attention and dedication they deserve. With each case we are given, we provide a personal approach so our client's needs and interests are fully addressed. Losing a loved one is hard enough, but when disputes arise regarding their estate, we want to help our clients find a quick and effective solution so they are not left with an overwhelming burden.

Shawn Kerendian

Keystone Law Group, P.C.

Shawn S. Kerendian is the founder and Principal of Keystone Law Group, P.C. Shawn started his legal career working on high net worth estates at one of the largest and most prestigious estate planning firms in Los Angeles. He then joined a litigation firm and headed the firm's expansion to include a Probate, Trusts and Estates division. As the supervising attorney of that division, Shawn managed, supervised and litigated hundreds of probate, trusts and estate matters, including trusts and estates valued in excess of $50 million. As a result of his desire to create a law practice dedicated to providing focused and efficient legal services in the probate, trusts and estates fields of law, Shawn founded Keystone Law Group, P.C.

Shawn has represented trustees, beneficiaries, heirs, executors, administrators, corporations, non-profit organizations, conservators and guardians in this focused field of law.As an experienced litigator, Shawn is comfortable handling all stages of litigation, including discovery, mediation, law and motion and trials, and has appeared before judges throughout Los Angeles, Orange, Riverside, and San Bernardino counties on matters related to probate, trusts and estates.

Timothy Barteau

Keystone Law Group, P.C.

Timothy D. F. Barteau is a Senior Associate at Keystone Law Group, P.C. based out of the San Francisco office. A career litigator, Tim has over a decade of experience before State and Federal Courts, litigating civil and trust and estate matters. Tim now focuses exclusively on the complex field of probate law, and primarily on trust, estate and conservatorship litigation and administration. Tim represents clients throughout California, including San Francisco and the surrounding counties, in a range of capacities, including as trustees, beneficiaries, executors, creditors, heirs, conservators and conservatees.

Tim was admitted to practice in California in 2004. His early career was spent litigating complex civil matters, many of which involved potential verdicts in the millions of dollars. Tim went on to spearhead the development of the estate planning and trust and estate administration and litigation department for his prior firm, while maintaining an emphasis in litigation. Tim is comfortable handling all stages of litigation, including discovery, mediation, law and motion and trials. Moreover, Tim has extensive planning, drafting and administration experience, which he is able to bring to bear to provide Keystone clients with comprehensive and effective representation.

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