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Estate Planning Law Firm

We are an estate planning law firm that helps people protect their legacy through legal planning for their family, property and businesses.

Estate planning is more than just a compilation of forms. It is a way for us to honor life, care for the sick or disabled, and to protect our clients’ wishes after death.  We recommend estate planning to anyone seeking peace of mind and control over an uncertain future.

We strive to provide the utmost care and loyalty to our community by helping others put together a trust or will plan to save their loved ones time and money in the event of death or incapacitation.  While we cannot predict the future, we analyze the unique family structure and assets of each client to make sure they are protected no matter what they face. 

Innovative Solutions

We use technology to make our process as easy and time efficient as possible.  You don’t have to put off planning because we help you get organized.

Quality Services

All legal services are performed by an attorney.  Our firm treats every client with the highest level of care and attention.

Affordable Results

We believe that high-quality legal services should not equal high rates. Our virtual services allow us to save on expensive overhead and time.  We pass those savings onto our client.

Meet our Superstar Team!

Jennifer Jancosek, Esq.

Jennifer Jancosek, Esq.

Founder and Principal Attorney

Jennifer Jancosek is principal attorney at Jancosek Law. She founded the Firm to assist Californian’s with protecting their property and families in the event of death, illness or an emergency.  

Jennifer has over 15 years of experience in various corporate, government and administrative positions along with 6 years of experience in the legal field.  Jennifer attended Purdue University where she received a Bachelor of Arts in Law and Society and Forensic Sciences in 2009. After graduation, Jennifer moved to Chicago, Illinois and worked at a boutique investment-banking firm before attending the John Marshall Law School where she graduated with a J.D.  Jennifer served as a licensed law clerk at the Cook County States Attorney’s Office in the Felony Trial Division from 2012-2014. During this clerkship, Jennifer litigated numerous motions and bench trials in favor of the state. After arriving in Los Angeles in 2014, Jennifer worked as a law clerk for a multidisciplinary firm performing civil transactional services including: family law, estate planning, disputes, consumer protection and intellectual property.

Supporting the local community is always a priority for Jennifer and in the past she has volunteered as a Tutor with Wilshire Crest Elementary through the Reading Partners program.  In addition to tutoring, she provided pro-bono services at the Stanley Mosk Courthouse through the Los Angeles County Bar Association’s Domestic Violence Clinic.

Jennifer is active in the legal community and is a member of the Los Angeles County Bar AssociationCalifornia Women Lawyer’s Association and the Women Lawyer’s Association of Los Angeles, Los Angeles Intellectual Property Law Association and the San Fernando Vally Bar Association.

Jennifer resides in Sherman Oaks, CA with her husband and three pets.  She spends her time outside of the legal and business world reading, loving all things Star Wars and exploring the great outdoors of the golden state with her dog Lola.

To learn more about Jennifer’s work and education experience, view her LinkedIn profile.

William H. Dietz

William H. Dietz

Associate Attorney

William H. Dietz, Esq. is an Associate Attorney at Jancosek Law.  He focuses his practice on Estate Planning and Intellectual Property protection. William has worked with clients ranging from families and small business owners to corporations and commercial property owners.

William joined Jancosek Law during his first year of Law School, serving as a Law Clerk and Notary Public while attending Southwestern Law School in Los Angeles.  He has experience with a variety of matters, including estate planning, contracts, copyrights, trademarks and entertainment.

William graduated from Purdue University with a Bachelor of Science degree in Neurobiology and Physiology, with minors in Psychology and Forensic Science.  Thereafter, he spent seven years in the Bio-Medical industry, where he managed research laboratories in Chicago and Los Angeles, and co-authored 7 publications along the way.  In May 2019, William graduated cum laude from Southwestern Law School, with his Juris Doctor degree, and became the first student to graduate with dual concentrations in Technology Law and Entrepreneurship as well as Entertainment and Media Law.

While attending Southwestern, William earned numerous “Exceptional Achievement” and “Excellence for the Future” awards in Criminal Law, Community Property, Intellectual Property Licensing, Patent Law, and Music Publishing. He served as a Federal Civil Procedure Teaching Assistant, a Dean’s Fellow, Editor-In-Chief of the Southwestern Law Review, and helped modest-means clients as an active member of Southwestern’s Entertainment & the Arts Legal Clinic.  His first legal article, “Protecting our Genetic Code: Recruiting Copyright Where Patents Have Failed,” was published by the Southwestern Law Review in Spring 2019.

William is an active member of the Los Angeles Intellectual Property Law Association. In his free time, he enjoys travelling, gardening, and spoiling his pets.

For more information on William’s credentials, visit his Linked-In profile.

Legal Services

We are a full-service estate planning law firm serving retirees, parents with minor children and all members of our community seeking to plan for their loved ones.  Contact our office today to learn more about how we tailor our services to meet your unique needs.


The living trust is an document that allows a person’s estate to avoid the cost and time of probate court, maintains privacy for their final wishes and provides control in how their property will be administered.  When a person dies, their assets are essentially “frozen” until someone, usually a family member, files a case in the probate court to have the property transferred to the next of kin under CA law.  This court process can take 1-3 years, with a price tag of $40,000-$100,000+ to complete.  With a living trust, you can avoid having your family and loved ones deal with the stress, time and cost of going through the courts.  


A will is a legal document that allows you to provide specific instructions for distribution of your assets and can be used to pre-select guardians, if you have children. 

In California, if you die without a will, your assets will pass through the laws of “intestate” under the Probate Code.  The intestate laws determine who will inherit your property based on surviving heirs and family members.

Most people do not want the laws of the State to determine who should inherit their assets.  If you die without a will, and your only remaining heir is a brother you never liked, then that person will inherit everything you have left behind!  If you want to select who will own your assets once you die, then you should get a will in place immediately.


Unexpected situations can arise at any time. Therefore, it’s important for all adults to have protections in place, not just the elderly.

An Advance Medical Directive, also known as a living will, allows you to give instructions for your doctor or caregiver if you fall into a coma or become terminally ill, seriously injured, or mentally incapacitated. It also gives you the option to appoint someone else to make decisions on your behalf if you become incapacitated. The directive can help to avoid unnecessary suffering, relieve your caregivers of heavy decision-making burdens, and prevent any disagreement about your wishes during a time of potential crisis or grief.


A Power of Attorney is a legal document where you (the “principle”), give another person (the “agent” or “attorney-in-fact”) the legal authority to act on your behalf in regards to financial matters.

Depending on your wishes, the agent’s power may be broad or limited to specific actions under certain conditions. You can grant your agent control over all financial decisions and matters, or the power can be limited to a single transaction or circumstance. Since the POA only affects your rights, you are in sole control of how much power is transferred.  

This document can help your loved ones manage your property and assets in an event where you are incapacitated and unable to care for yourself.

How Does COVID-19 Affect my Estate Plan?

Since the COVID-19 outbreak began earlier this year, many people have been lying awake at night wondering what the future will hold. As our daily lives continue to effected, people who already have estate planning documents may find themselves questioning whether their plan needs to be updated due to the increased chance of a medical emergency.

What is an Advance Medical Directive?

Unexpected situations can arise at any time. Therefore, it’s important for all adults to have protections in place, not just the elderly. An Advance Medical Directive allows you to give instructions for your doctor or caregiver if you fall into a coma or become terminally ill, seriously injured, or mentally incapacitated.

What Happens to My Estate Plan if I Get a Divorce?

When life changes, it is important to remember to get your estate planning documents updated. A divorce is no exception to this rule. The marital settlement agreement, which is required to finalize a divorce in California, will generally void most joint living trusts and wills between spouses.

What Happens if I Die Without a Will?

A will is a document that gives legal power to your wishes and desires after you pass.  It allows you the power to reach from beyond the grave and bind your heirs to uphold your decisions and wishes as clearly laid out on paper. 

What is a Durable Power of Attorney?

A Power of Attorney is a legal document where you (the “principle”), give another person (the “agent” or “attorney-in-fact”) the legal authority to act on your behalf.

Schedule an Initial Call Now


Jancosek Law is an estate planning law firm that provides virtual estate planning legal services throughout the state of California.  We provide mobile services to assist our clients in signing theirs wills and trusts throughout the Los Angeles County area.

Our goal is to make working with an attorney easy and accessible.

Call us at (818) 806-8089 to schedule an appointment or fill out our form below to discuss your free estate planning strategy session with Jennifer.

Mailing Address
15030 Ventura Blvd.
Sherman Oaks, CA