About Us
Expert Legal Representation For Your Needs
Beyond Professional Legal Representation.
Kassab Archbold O'Brien & Peifer P.C. is a focused service Law Firm, with offices located in the suburban Philadelphia community of Media, Delaware County, Pennsylvania.
For over 50 years the Firm's attorneys have represented clients throughout the Commonwealth of Pennsylvania in a variety of real estate tax, and estate matters.
Focused service law firm located in Delaware County, PA.
50 years of experience in real estate tax and estate matters.
Representing clients across Pennsylvania with expertise.
Team Members
Our Expert Attorneys
Joseph Patrick O'Brien, Esquire
Joseph O'Brien has been in practice for over 40 years at KAOP P.C. where he is Managing Partner. With an LLM in Taxation and a CPA (now inactive) Joe's concentration has always been business and tax related but has developed into the specialization in tax assessment litigation.
John Yanoshak, Esquire
John Yanoshak heads up the firm's tax and estate practice. With over 40 years of experience as a CPA and Attorney, John has resolved a variety of business and tax related issues for clients. He is an avid Philadelphia sports fan who takes the Phillies almost as seriously as he does his law practice.
Christopher Peifer, Esquire
Chris has developed his practice to be client focused working on a wide range of issues for clients from tax assessments to civil disputes. Chris analyzes each of his clients' files researching every potential solution to their legal concerns.
Expert Guidance
Get answers to common questions about real estate tax appeals, estate planning, and business law.
Custom Solutions
Learn how our tailored legal services address your specific needs and challenges.
Trusted Experience
Discover how over 40 years of legal expertise benefits our clients throughout Pennsylvania.