Atty. Gregory Thomas Costello

Atty. Gregory Thomas Costello

Gregory Thomas Costello is a lawyer practicing environmental law, environmental litigation. Gregory received a B.A. degree from University of Virginia in 1980, and has been licensed for 41 years.

Seattle Seattle 41 yrs experience 41 year
Call (206) 905-4789 Book Appointment

Profile Summary

About Gregory Thomas Costello at a glance

Gregory Thomas Costello is a Western Envir. Law Ctr. based in Seattle, Washington. They have 41+ years of legal experience, licensed to practice since 1985. Their practice focuses on litigation and environmental. Admitted to practice in Colorado (1985) and Washington (1986). Educated at University of Colorado at Boulder (J.D., 1985) and University of Virginia (B.A., 1980). Recognitions include AV Preeminent. Serands clients in Seattle, WA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Gregory Thomas Costello is a lawyer practicing environmental law, environmental litigation
  • Gregory received a B.A. degree from University of Virginia in 1980, and has been licensed for 41 years
  • Gregory practices in Seattle, WA

Practice Areas Explained

Gregory Thomas Costello's Areas of Practice

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

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

Gregory Thomas Costello is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Washington →

Environmental Law

Environmental attorneys for regulatory compliance, contamination, land use, and natural resource law.

Gregory Thomas Costello is one of 56,434 environmental attorneys indexed nationally. Browse environmental attorneys in Washington →

Jurisdictional Context

Why local counsel matters in Washington

Practicing law in Washington. Legal matters in Washington are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Seattle are typically filed in the local municipal court or the appropriate Washington state district court, depending on subject matter and amount in controversy. An attorney licensed in Washington 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 Washington courts without local counsel or pro hac vice admission.

Looking for additional Washington attorneys? Browse all attorneys in Seattle or all attorneys in Washington.

Frequently Asked

Common questions about Gregory Thomas Costello

Where is Gregory Thomas Costello's law office located?
Gregory Thomas Costello's law practice is located in Seattle, Washington. You can contact the office directly through this profile page.
What practice areas does Gregory Thomas Costello handle?
Gregory Thomas Costello focuses on litigation, environmental. Each practice area listed reflects experience handling cases of that type in Washington.
How long has Gregory Thomas Costello practiced law?
Gregory Thomas Costello has 41+ years of legal experience and has been licensed since 1985.
Where did Gregory Thomas Costello go to law school?
Gregory Thomas Costello earned their education at (J.D., 1985); (B.A., 1980).
How can I contact Gregory Thomas Costello for a consultation?
You can contact Gregory Thomas 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.
What awards or recognition has Gregory Thomas Costello received?
Gregory Thomas Costello's notable recognition includes: AV Preeminent.

Education

J.D.
University of Colorado at Boulder
- 1985
B.A.
University of Virginia
- 1980

Awards

AV Preeminent

Bar Admissions

Colorado
Admitted: 1985
Washington
Admitted: 1986

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