Atty. Mary E. Costigan

Atty. Mary E. Costigan

Ms. Mary E.

Portland Portland 25 Years Experience 25 year

Profile Summary

About Mary E. Costigan at a glance

Mary E. Costigan is a Shareholder based in Portland, Maine, practicing at Bernstein Shur. They have 25+ years of legal experience, licensed to practice since 2001. Their practice focuses on business, zoning, and energy. Admitted to practice in Maine State of New Jersey U.S. District Court, District of Maine (2001). Educated at Vermont Law School (J.D., 1997) and University of Delaware (B.A. Vermont, 1994). Active member of MEMBERSHIPS Maine State Bar Association. Serves clients in Portland, ME and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Ms. Mary E. Costigan is a lawyer practicing energy, land use & environmental, municipal & governmental services and 2 other areas of law
  • Mary received a B.A. degree from University of Delaware in 1994, and has been licensed for 25 years
  • Mary practices at Bernstein Shur in Portland, ME

Practice Areas Explained

Mary E. Costigan's Areas of Practice

Each practice area below reflects the types of cases Mary E. Costigan handles, with a brief overview of what that area of law covers.

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

Mary E. Costigan is one of 452,854 business attorneys indexed nationally. Browse business attorneys in Maine →

Land Use & Zoning

Mary E. Costigan is one of 36,102 zoning attorneys indexed nationally. Browse zoning attorneys in Maine →

Energy & Utilities Law

Energy attorneys for oil & gas, renewables, utility regulation, and energy sector transactions.

Mary E. Costigan is one of 32,699 energy attorneys indexed nationally. Browse energy attorneys in Maine →

Jurisdictional Context

Why local counsel matters in Maine

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

Looking for additional Maine attorneys? Browse all attorneys in Portland or all attorneys in Maine.

Frequently Asked

Common questions about Mary E. Costigan

Where is Mary E. Costigan's law office located?
Mary E. Costigan's law practice is located in Portland, Maine. The firm is Bernstein Shur. You can contact the office directly through this profile page.
What practice areas does Mary E. Costigan handle?
Mary E. Costigan focuses on business, zoning, energy. Each practice area listed reflects experience handling cases of that type in Maine.
How long has Mary E. Costigan practiced law?
Mary E. Costigan has 25+ years of legal experience and has been licensed since 2001.
Where did Mary E. Costigan go to law school?
Mary E. Costigan earned their education at (J.D., 1997); (B.A. Vermont, 1994).
How can I contact Mary E. Costigan for a consultation?
You can contact Mary E. Costigan 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.
Vermont Law School
- 1997
B.A. Vermont
University of Delaware
- 1994

Bar Admissions

Maine State of New Jersey U.S. District Court, District of Maine
Admitted: 2001

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