Atty. Jan Allison Costello

Atty. Jan Allison Costello

Jan Allison Costello is a lawyer practicing litigation, tax. Jan received a B.A. degree from Hunter College of City University of New York in 1973, and has been licensed for 32 years.

Darien Darien 32 yrs experience 32 year
Call (475) 334-0362 Book Appointment

Profile Summary

About Jan Allison Costello at a glance

Jan Allison Costello is an Associate based in Darien, Connecticut, practicing at Pierson Law Firm. They have 32+ years of legal experience, licensed to practice since 1994. Their practice focuses on tax and litigation. Admitted to practice in Connecticut (1994), New York (1995), and Florida (1998). Educated at City University of New York School of Law, Queens College (J.D., 1994) and Hunter College of City University of New York (B.A., 1973). Recognitions include CV Notable. Serands clients in Darien, CT and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Jan Allison Costello is a lawyer practicing litigation, tax
  • Jan received a B.A. degree from Hunter College of City University of New York in 1973, and has been licensed for 32 years
  • Jan practices at Pierson Law Firm in Darien, CT

Practice Areas Explained

Jan Allison Costello's Areas of Practice

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

Tax Law

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

Jan Allison Costello is one of 85,302 tax attorneys indexed nationally. Browse tax attorneys in Connecticut →

Civil Litigation

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

Jan Allison Costello is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Connecticut →

Jurisdictional Context

Why local counsel matters in Connecticut

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

Looking for additional Connecticut attorneys? Browse all attorneys in Darien or all attorneys in Connecticut.

Frequently Asked

Common questions about Jan Allison Costello

Where is Jan Allison Costello's law office located?
Jan Allison Costello's law practice is located in Darien, Connecticut. The firm is Pierson Law Firm. You can contact the office directly through this profile page.
What practice areas does Jan Allison Costello handle?
Jan Allison Costello focuses on tax, litigation. Each practice area listed reflects experience handling cases of that type in Connecticut.
How long has Jan Allison Costello practiced law?
Jan Allison Costello has 32+ years of legal experience and has been licensed since 1994.
Where did Jan Allison Costello go to law school?
Jan Allison Costello earned their education at (J.D., 1994); (B.A., 1973).
How can I contact Jan Allison Costello for a consultation?
You can contact Jan Allison 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 Jan Allison Costello received?
Jan Allison Costello's notable recognition includes: CV Notable.

Practice Areas

Education

J.D.
City University of New York School of Law, Queens College
- 1994
B.A.
Hunter College of City University of New York
- 1973

Awards

CV Notable

Bar Admissions

Connecticut
Admitted: 1994
New York
Admitted: 1995
Florida
Admitted: 1998

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