In June 2016, long-time California attorney, Kate Kostrzewa, founded KDK Legal – a Half Moon Bay law firm focused exclusively on Estate Planning, Estate Administration and Probate Proceedings. Kate has lived on the San Mateo County coast for over 20 years. She is pleased to put many years of legal experience to work for clients in her local community and beyond. 

Kate trained as a tax attorney while attending UCLA Law School. She began her career in 1990 in the Tax Department at Brobeck, Phleger and Harrison in Palo Alto.  She then spent 20 years as a civil litigator in San Mateo County working primarily on employment, business, real estate, municipal law and probate matters. Kate also maintained an Estate Planning practice.  Now a mom with a child in the Cabrillo Unified School District, Kate has moved on from the demanding and high stress world of civil litigation. She has returned full-time to her tax law roots by opening her own law firm specializing in Estate Planning, Estate Administration and Probate.



KDK Legal’s mission is to provide clients with reasonably priced, high quality legal work.  Kate’s work is informed by thoughtful and thorough analysis of the law and the relevant facts.  Kate then develops individualized solutions to meet each client’s unique needs. 


Kate’s motto is “Professional, Polite and Persuasive”. Kate’s commitent to this practice approach enables her to provide KDK Legal’s Estate Planning clients with comprehensive legal services based on current best practices. The approach is effective when dealing with opposing counsel or when convincing a court to side with a client’s position. 


Kate has served her clients and her community for over 25 years.  If you are looking for an attorney to assist you with your own estate, or the estate of a loved one, contact Kate today!


If you are looking for a trusted advisor or excellent representation, look no further, as Kate Kostrzewa is your advocate. At first, an estate plan appeared to be a daunting task involving very difficult decisions. Thankfully, Kate patiently and methodically guided me along the way. Most importantly, she explained why I needed to do certain things to have the desired outcome and explained what the ramifications would be if I did not. Her ability to keep me calm and focused was extremely helpful. Throughout the whole process, I knew that I was in the right hands and am so happy I decided to seek her services.


Montara, CA

I’d been putting off creating a living trust and finally got myself motivated to get it done. I wanted to stay local so I contacted Kate Kostrzewa of KDK Legal for an appointment. Kate made the entire process easy and painless. She gave me direction on what documents I needed to bring with me and asked all of the right questions. I now have a trust in place and feel confident that my family will not have to fight the legal system and the various estate laws once the time comes. Kate is a consummate professional and I’d recommend her in a heartbeat.

Pescadero, CA