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Flagg Law Group, P.C. is a law firm specializing in general business law, corporate counsel services, tax issues, probate, estate planning, and asset protection for high net worth individuals, entrepreneurs, and businesses. We look forward to working with you.





Estate planning is the act of preparing for the transfer of a person's wealth and assets after his or her death. Assets, life insurance, pensions, real estate, cars, personal belongings, and debts are all part of one's estate. In many instances, tax planning is involved in estate planning.

Flagg Law Group, P.C.
17110 Dallas Pkwy, Ste. 210, Dallas, Texas 75248
Tel: (972) 248-4111
Fax: (972) 248-7378


Probate is the legal process of proving a will is valid and thereafter administering the estate of a deceased person according to the terms of the will. It includes dealting with creditors of the deceased and addressing any disputed issues.


Asset protection is a type of planning intended to protect one's assets from creditor claims. Individuals and business entities use asset protection techniques to limit creditors' access to certain valuable assets, while operating within the bounds of debtor-creditor law.


Business law encompasses all of the laws that dictate how to form, run, buy, manage and close or sell any type of business. 


Federal. State and local governments have legal authority to collect taxes. Often, taxpayers want to challenge the amount of tax due or need assistaince in negotiating a payment plan.
Client Testimonials

Professional and Dedicated

I have been a client of Flagg Law Group for 12 plus years. Brett and his staff have completed many legal matters for me over the years.


From legal advice to creating corporations and LLCs and preparing wills, I have found Brett to be professional and dedicated to his work, always completing my legal issues in a timely manner. I really appreciate all of his help over the years.

Kevin J. Deering

Venture Pools, Inc.

Highest Integrity

I find Brett to be of highest integrity, and has a calm that is helpful when we work through difficult or potentially volatile negotiations.  Brett is good at transaction work and contracts. Several of my clients use Brett and I will continue to recommend him.

Bob Williaford

Titanium Strategies

Highest Regard

Having a decade-long professional relationship with Flagg Law Group is an asset to our firm and clients. Knowing that clients will be in the hands of a trusted and wise group such as Brett and his team makes them our "go-to firm" for family estate planning. We hold them in the highest regard.

Michelle Brennan Hall
CAP, Founder

Brennan Wealth Advisors, LLC




Our goal is to provide a pleasant and satisfying experience for our clients while successfully fulfilling their legal needs. We hope our clients notice a positive difference between their dealings with our firm and their experiences with other lawyers.


Flagg Law Group, P.C.

17110 Dallas Pkwy, Ste. 210, Dallas, Texas 75248

Tel: (972) 248-4111

Fax: (972) 248-7378

We are committed to excellence in all we do. We strive to be innovative and passionate about continuous improvement in the following ways:


Client contacts:     From the time a client enters the office or calls, we will be warm, courteous, organized and professional.


Work Product:      We strive to make all final work product look attractive and be accurate and without error.


Responsiveness:    We will attempt to return all calls promptly, but in no event later than the following business day. All work will be completed timely and, when possible, prior to the deadline we have established with the client. We strive to over deliver on promises made to our clients.


Office Environment: Our offices are organized, attractive, and clean. You will notice a friendly, team-oriented office environment, with all staff working toward the singular goal of providing the highest quality services to our clients.


Efficiency: We strive for efficiency in the use of our time and resources to the benefit of our clients. In an effort to benefit our clients, we look for ways to reduce expenses without sacrificing quality.





Born and raised in Dallas, Mr. Flagg currently resides in Frisco with his wife Lisa. He has a son who graduated from the United States Military Academy at West Point, served as an officer in the Army for 8 years, and is currently pursuing an MBA at Harvard University. His daughter is currently completing her PhD from the University of St. Andrews in Scotland.


Baylor University
Bachelor of Business Administration (BBA)(1981)

Baylor University Law School
Juris Doctorate (JD)(1983)

Georgetown University School of Law
Master of Laws in Taxation (LLM)(1984)


Flagg Law Group, P.C.
President and Owner (1996-present)

Dallas, Texas

A law firm specializing in general business law, corporate counsel services, probate, estate planning, and asset protection planning for high net worth individuals, entrepreneurs, and businesses.

Gardere & Wynne
Partner (1993-1996) (Associate (1989-1993)

Dallas, Texas

A large law firm providing general legal services.

Brice & Mankoff, Attorneys
Associate (1985-1989)

Dallas, Texas

A law firm specializing in tax and corporate law.

Payne and Vendig, P.C.
Associate (1984-1985)

Dallas, Texas

A law firm providing general business legal services.


Board Positions, Professional Affirmations and Other Leadership Responsibilities

Texas Bar Association

Frisco Chamber of Commerce
Member and former Board of Directors

Trinity Christian Academy, Addison, Texas
Former Member, Board of Trustees (2000-2008); Chairman (2004-2006)

Baptist Church Loan Corporation, Dallas, Texas
Former Board of Directors (1999-2006)

e3 Partners Ministry, Plano, Texas
Member, Board of Directors (2011-present)

Stonebriar Community Church, Frisco, Texas
Elder (2019-present)

Texas Mutual Insurance Company, Austin, Texas
Appointed by Governor Greg Abbott (June 2019 - present)

Brett B. Flagg

Heritage Auction Galleries
Dallas, Texas 

​Star Medical Specialties, Inc.            
Dallas, Texas

​Bonded Lightning Protection Systems, Ltd.
Argyle, Texas

​Pacheco Koch Engineers, Inc.  
Dallas, Texas

Retirement Advisors of America
Dallas, Texas

Brennan Financial Services
Dallas, Texas

Sky Ranches, Inc. 
Van, Texas

Venture Pools
Plano, Texas 



17110 N. Dallas Pkwy

Suite 210

Dallas, Texas 75248
Tel:  972-248-4111

Fax: 972-248-7378​

For any general inquiries, please fill in the following contact form:

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