Atty. Irene Costas

Atty. Irene Costas

Irene Costas is a lawyer practicing family, estate planning, civil litigation and 2 other areas of law. Irene received a B.A. degree from Fontbonne College, and has been licensed for 18 years.

Clayton Clayton 18 yrs experience 18 year
Call (314) 925-7579 Book Appointment

Profile Summary

About Irene Costas at a glance

Irene Costas is an Associate based in Clayton, Missouri, practicing at Kayira, LLP. They have 18+ years of legal experience, licensed to practice since 2008. Their practice focuses on probate, family law, estate planning, business, and litigation. Admitted to practice in Missouri (2008). Educated at St. Louis University School of Law (J.D., 2008) and Fontbonne College B.A. St. Louis University Masters in Public Health (—). Active member of The Missouri Bar American Bar Association. Serands clients in Clayton, MO and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Irene Costas is a lawyer practicing family, estate planning, civil litigation and 2 other areas of law
  • Irene received a B.A. degree from Fontbonne College, and has been licensed for 18 years
  • Irene practices at Kayira, LLP in Clayton, MO

Practice Areas Explained

Irene Costas's Areas of Practice

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

Probate

Irene Costas is one of 128,014 probate attorneys indexed nationally. Browse probate attorneys in Missouri →

Family Law

Family law attorneys handle divorce, child custody, child support, adoption, prenups, and protective orders. Find verified family lawyers near you.

Irene Costas is one of 187,066 family law attorneys indexed nationally. Browse family law attorneys in Missouri →

Estate Planning & Probate

An estate planning attorney prepares wills, trusts, powers of attorney, and healthcare directives to protect your family and pass on your assets.

Irene Costas is one of 226,536 estate planning attorneys indexed nationally. Browse estate planning attorneys in Missouri →

Business & Corporate Law

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

Irene Costas is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Missouri →

Civil Litigation

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

Irene Costas is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Missouri →

Jurisdictional Context

Why local counsel matters in Missouri

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

Looking for additional Missouri attorneys? Browse all attorneys in Clayton or all attorneys in Missouri.

Frequently Asked

Common questions about Irene Costas

Where is Irene Costas's law office located?
Irene Costas's law practice is located in Clayton, Missouri. The firm is Kayira, LLP. You can contact the office directly through this profile page.
What practice areas does Irene Costas handle?
Irene Costas focuses on probate, family law, estate planning, business, litigation. Each practice area listed reflects experience handling cases of that type in Missouri.
How long has Irene Costas practiced law?
Irene Costas has 18+ years of legal experience and has been licensed since 2008.
Where did Irene Costas go to law school?
Irene Costas earned their education at (J.D., 2008); (—).
How can I contact Irene Costas for a consultation?
You can contact Irene Costas 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.
St. Louis University School of Law
- 2008
Fontbonne College B.A. St. Louis University Masters in Public Health
- In Progress

Bar Admissions

Missouri
Admitted: 2008

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