Atty. Mark Costello

Atty. Mark Costello

Mark Costello is a lawyer practicing probate & trust, insurance defense, real property and 1 other area of law. Mark received a B.A. degree from Arizona State University in 2013, and has been licensed for 9 years.

Deerfield Beach Deerfield Beach 9 Years Experience 9 year

Profile Summary

About Mark Costello at a glance

Mark Costello is an Attorney based in Deerfield Beach, Florida, practicing at Chartwell Law. They have 9+ years of legal experience, licensed to practice since 2017. Their practice focuses on trusts, probate, real estate, tax, and insurance. Admitted to practice in Florida (2017) and New York (2021). Educated at Arizona State University (B.A. English, 2013). Serves clients in Deerfield Beach, FL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark Costello is a lawyer practicing probate & trust, insurance defense, real property and 1 other area of law
  • Mark received a B.A. degree from Arizona State University in 2013, and has been licensed for 9 years
  • Mark practices at Chartwell Law in Deerfield Beach, FL

Practice Areas Explained

Mark Costello's Areas of Practice

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

Trusts

Mark Costello is one of 94,411 trusts attorneys indexed nationally. Browse trusts attorneys in Florida →

Probate

Mark Costello is one of 115,645 probate attorneys indexed nationally. Browse probate attorneys in Florida →

Real Estate Law

Real estate attorneys handle home purchases, sales, commercial transactions, title disputes, and landlord-tenant matters.

Mark Costello is one of 286,061 real estate attorneys indexed nationally. Browse real estate attorneys in Florida →

Tax Law

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

Mark Costello is one of 77,130 tax attorneys indexed nationally. Browse tax attorneys in Florida →

Insurance Law

Insurance attorneys for coverage disputes, bad faith claims, denied claims, and policy disputes.

Mark Costello is one of 109,871 insurance attorneys indexed nationally. Browse insurance attorneys in Florida →

Jurisdictional Context

Why local counsel matters in Florida

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

Looking for additional Florida attorneys? Browse all attorneys in Deerfield Beach or all attorneys in Florida.

Frequently Asked

Common questions about Mark Costello

Where is Mark Costello's law office located?
Mark Costello's law practice is located in Deerfield Beach, Florida. The firm is Chartwell Law. You can contact the office directly through this profile page.
What practice areas does Mark Costello handle?
Mark Costello focuses on trusts, probate, real estate, tax, insurance. Each practice area listed reflects experience handling cases of that type in Florida.
How long has Mark Costello practiced law?
Mark Costello has 9+ years of legal experience and has been licensed since 2017.
Where did Mark Costello go to law school?
Mark Costello earned their education at (B.A. English, 2013).
How can I contact Mark Costello for a consultation?
You can contact Mark 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.

Education

B.A. English
Arizona State University
- 2013

Bar Admissions

Florida
Admitted: 2017
New York
Admitted: 2021

Reviews

These reviews belong to platform users; they do not constitute advertisement or promotion for the attorney. Opinions are published for informational purposes only.

No reviews yet.