Atty. Diane Julia Klein

Atty. Diane Julia Klein

Diane Julia Klein is a lawyer practicing estate planning, taxation. Diane has been licensed for 27 years.

Ontario Ontario 27 yrs experience 27 year
Call (840) 256-4252 Book Appointment

Profile Summary

About Diane Julia Klein at a glance

Diane Julia Klein is a estate planning and tax attorney based in Ontario, California. They have 27+ years of legal experience, licensed to practice since 1999. Admitted to practice in California (1999). Serands clients in Ontario, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Diane Julia Klein is a lawyer practicing estate planning, taxation
  • Diane has been licensed for 27 years
  • Diane practices in Ontario, CA

Practice Areas Explained

Diane Julia Klein's Areas of Practice

Each practice area below reflects the types of cases Diane Julia Klein handles, with a brief overview of what that area of law covers.

Estate Planning & Probate

An estate planning attorney prepares wills, trusts, powers of attorney, and healthcare directives to protect your family and pass on your assets.

Diane Julia Klein is one of 226,536 estate planning attorneys indexed nationally. Browse estate planning attorneys in California →

Tax Law

Tax attorneys handle IRS audits, tax debt, international tax, estate planning, and tax court litigation.

Diane Julia Klein is one of 85,302 tax attorneys indexed nationally. Browse tax attorneys in California →

Jurisdictional Context

Why local counsel matters in California

Practicing law in California. Legal matters in California are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Ontario are typically filed in the local municipal court or the appropriate California state district court, depending on subject matter and amount in controversy. An attorney licensed in California brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in California courts without local counsel or pro hac vice admission.

Looking for additional California attorneys? Browse all attorneys in Ontario or all attorneys in California.

Frequently Asked

Common questions about Diane Julia Klein

Where is Diane Julia Klein's law office located?
Diane Julia Klein's law practice is located in Ontario, California. You can contact the office directly through this profile page.
What practice areas does Diane Julia Klein handle?
Diane Julia Klein focuses on estate planning, tax. Each practice area listed reflects experience handling cases of that type in California.
How long has Diane Julia Klein practiced law?
Diane Julia Klein has 27+ years of legal experience and has been licensed since 1999.
How can I contact Diane Julia Klein for a consultation?
You can contact Diane Julia Klein directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Practice Areas

Bar Admissions

California
Admitted: 1999

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