Atty. Joseph L. Costello

Atty. Joseph L. Costello

Joseph L. Costello is a lawyer practicing admiralty law, maritime law, international law and 2 other areas of law.

Sonoma Sonoma 56 yrs experience 56 year
Call (415) 450-6685 Book Appointment

Profile Summary

About Joseph L. Costello at a glance

Joseph L. Costello is a Member based in Sonoma, California, practicing at Joseph L. Castello Attorney at Law. They have 56+ years of legal experience, licensed to practice since 1970. Their practice focuses on personal injury, workers comp, maritime, and international. Admitted to practice in Virgin Islands (1970) and California (1984). Educated at University of Louisville (J.D., 1970) and University of Steubenville (B.S., 1966). Active member of State Bar of California. Serands clients in Sonoma, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Joseph L. Costello is a lawyer practicing admiralty law, maritime law, international law and 2 other areas of law
  • Joseph received a B.S. degree from University of Steubenville in 1966, and has been licensed for 56 years
  • Joseph practices at Joseph L. Castello Attorney at Law in Sonoma, CA

Practice Areas Explained

Joseph L. Costello's Areas of Practice

Each practice area below reflects the types of cases Joseph L. Costello handles, with a brief overview of what that area of law covers.

Personal Injury

Personal injury attorneys help accident victims recover compensation for medical bills, lost wages, and pain & suffering. Most work on contingency — no fee unless you win.

Joseph L. Costello is one of 264,852 personal injury attorneys indexed nationally. Browse personal injury attorneys in California →

Workers Compensation

Workers compensation lawyers help injured workers get medical care, lost wages, and disability benefits. Free consult, no fee unless you win.

Joseph L. Costello is one of 55,389 workers comp attorneys indexed nationally. Browse workers comp attorneys in California →

Maritime & Admiralty Law

Maritime attorneys for Jones Act claims, longshore injury, cruise ship cases, and offshore matters.

Joseph L. Costello is one of 11,568 maritime attorneys indexed nationally. Browse maritime attorneys in California →

International Law

International law attorneys for cross-border transactions, trade, foreign investment, and treaties.

Joseph L. Costello is one of 40,133 international attorneys indexed nationally. Browse international 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 Sonoma 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 Sonoma or all attorneys in California.

Frequently Asked

Common questions about Joseph L. Costello

Where is Joseph L. Costello's law office located?
Joseph L. Costello's law practice is located in Sonoma, California. The firm is Joseph L. Castello Attorney at Law. You can contact the office directly through this profile page.
What practice areas does Joseph L. Costello handle?
Joseph L. Costello focuses on personal injury, workers comp, maritime, international. Each practice area listed reflects experience handling cases of that type in California.
How long has Joseph L. Costello practiced law?
Joseph L. Costello has 56+ years of legal experience and has been licensed since 1970.
Where did Joseph L. Costello go to law school?
Joseph L. Costello earned their education at (J.D., 1970); (B.S., 1966).
How can I contact Joseph L. Costello for a consultation?
You can contact Joseph L. Costello 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.

Education

J.D.
University of Louisville
- 1970
B.S.
University of Steubenville
- 1966

Bar Admissions

Virgin Islands
Admitted: 1970
California
Admitted: 1984

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