Atty. William A. Costello

Atty. William A. Costello

William A. Costello is a lawyer.

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Profile Summary

About William A. Costello at a glance

William A. Costello is an attorney based in Falmouth, Massachusetts. Admitted to practice in Massachusetts (1942). Serands clients in Falmouth, MA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William A. Costello is a lawyer
  • William has been licensed for 84 years
  • William practices in Falmouth, MA

Jurisdictional Context

Why local counsel matters in Massachusetts

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

Looking for additional Massachusetts attorneys? Browse all attorneys in Falmouth or all attorneys in Massachusetts.

Frequently Asked

Common questions about William A. Costello

Where is William A. Costello's law office located?
William A. Costello's law practice is located in Falmouth, Massachusetts. You can contact the office directly through this profile page.
How can I contact William A. Costello for a consultation?
You can contact William A. 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.

Bar Admissions

Massachusetts
Admitted: 1942

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