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 yrs experience 9 year
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Insurance Defense & More Attorney · Serving Deerfield Beach, FL · 9+ Years Experience

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 October 2026

About 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
  • Mark practices at Chartwell Law in Deerfield Beach, FL

Practice Areas Explained

Mark Costello's Areas of Legal Practice

Each practice area below reflects the types of cases Mark Costello handles, with a practical overview of what that area of law involves and how it may apply to your situation in Deerfield Beach.

Trusts in Deerfield Beach

Mark Costello is one of 103,428 trusts attorneys indexed nationally. Browse trusts attorneys in Florida →

Probate in Deerfield Beach

Mark Costello is one of 127,041 probate attorneys indexed nationally. Browse probate attorneys in Florida →

Real Estate Law in Deerfield Beach

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

Mark Costello is one of 313,729 real estate attorneys indexed nationally. Browse real estate attorneys in Florida →

Tax Law in Deerfield Beach

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

Mark Costello is one of 84,606 tax attorneys indexed nationally. Browse tax attorneys in Florida →

Insurance Law in Deerfield Beach

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

Mark Costello is one of 120,903 insurance attorneys indexed nationally. Browse insurance attorneys in Florida →

Jurisdictional Context

Why Local Counsel Matters in Deerfield Beach

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.

Deerfield Beach Courts and Legal Process

Choosing a Deerfield Beach-based attorney means your counsel already knows the local docketing timelines, preferred filing formats, and how individual judges typically rule on procedural motions — details that only come from practicing in this jurisdiction day after day. That local familiarity can translate to better strategy, faster filings, and fewer costly surprises.

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.

Professional Profile

Why Clients in Deerfield Beach Choose Mark Costello

Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish Mark Costello's practice in the field of trusts, probate, real estate, tax, and insurance.

9+ Years of Legal Practice

With 9 years in the profession, Mark Costello has developed the procedural fluency and courtroom instincts that come from handling real cases under real deadlines.

Multi-State Bar Admission

Licensed in Florida and New York, Mark Costello can represent clients in cases that span state lines or require counsel in multiple jurisdictions.

Broad Practice Area Coverage

Covering trusts, probate, and real estate, Mark Costello can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.

Local Presence in Deerfield Beach

A Deerfield Beach-based practice means Mark Costello attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.

Case Types

Common Legal Issues Mark Costello Handles in Deerfield Beach

Below is a representative sample of the types of matters Mark Costello has experience with under Florida law. If your situation involves one of these case categories, this attorney may be well positioned to help you understand your options.

Residential property transactions
Real Estate
Commercial lease disputes
Real Estate
Title and deed issues
Real Estate
Landlord-tenant conflicts
Real Estate
IRS audit representation
Tax
Tax lien and levy defense
Tax
Offer in compromise
Tax
Business tax planning
Tax

This list is illustrative, not exhaustive. Contact Mark Costello directly to discuss the specifics of your situation.

Search Reference

How People Find Mark Costello Online

Prospective clients searching for legal help in Deerfield Beach commonly use a combination of the attorney's name and their specific legal need. The following search terms frequently lead people to this profile and to attorneys like Mark Costello.

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If any of the above matches what you searched for, you've found the right profile. Use the contact options at the top of this page to get in touch with Mark Costello directly.

Mark Costello's Practice Areas & Specializations

Education & Law School Background

B.A. English
Arizona State University
- 2013

Bar Admissions & Licensed Jurisdictions

Florida
Admitted: 2017
New York
Admitted: 2021

Client Reviews & Ratings — Mark Costello

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