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Erin Thrash: Managing Three Generations of the Same Family’s Estate Plans

Most estate planning attorneys work with a client once, maybe twice, over a lifetime. Erin Thrash’s firm specifically markets having represented as many as three generations within a single client family — grandparents, parents, and children, all guided through their own estate plans by the same firm over decades. That kind of multi-generational continuity is a specific, structural claim about the firm’s longevity and client retention, not a vague marketing phrase.

Origin and Background

Erin M. Thrash earned her J.D. from Louisiana State University in 1982 and has been licensed to practice law in both Texas and Louisiana since that year — 43 years of continuous practice. She is board certified in Estate Planning and Probate Law by the Texas Board of Legal Specialization and is a Fellow of the Austin Bar Association. Her firm, Thrash, Carroll & Sanchez Law Group, has practiced in the Lake Travis area for more than 30 years. Fellow named partner Hazel A. Sanchez is also board certified in Estate Planning and Probate Law; combined, the two board-certified attorneys bring more than 60 years of experience. Michael Carroll, another firm partner, holds an undergraduate degree and J.D. from Baylor University.

Practice Concentration

The firm practices estate planning, asset protection (“defensive estate planning”), business succession planning, probate, guardianship, and trust administration, with a specific stated focus on serving multi-generational families and Texas landowners with legacy wealth. The firm’s own materials describe using “all of the tools of estate planning and defensive estate planning” to accomplish client goals, and note representing as many as three generations within individual client families. For a broader comparison of Austin estate planning practices, see our Estate Planning & Probate directory.

Notable Work / Track Record

As is standard for estate planning practices, the firm does not publish verdict or settlement figures, since transactional estate planning doesn’t generate case outcomes in the traditional sense. Awesome Attorneys is disclosing that gap rather than substituting marketing language for it. What is independently verifiable is an unusually long, documented client-retention pattern: multiple reviews describe client relationships spanning 13 to 20 years with the same firm, including families who have returned across successive life events (marriage, death of a parent, birth of children) rather than treating estate planning as a single transaction.

Client Voice

The firm’s reviews consistently emphasize longevity and thoroughness rather than one-time transactional service. One long-term client wrote: “We started using Erin Thrash and this firm back around 2010 for estate planning… in ~13 years or more, we have never felt that we have received anything other than stellar high quality guidance and service.” Another, describing tax planning work spanning nearly two decades, wrote: “We have turned to Erin and the Thrash Law Firm for all our varied tax planning & legal matters for nearly 20 years. Knowledgeable, personalized and professional.” A client who lost a parent without a will in place specifically credited the firm with guiding a confused family through the probate process. Awesome Attorneys did not identify negative reviews for this firm in the course of research; given the review platforms searched, this should be read as “none found” rather than “none exist.”

Beyond the Courtroom

The firm’s stated specialization in Texas landowner and multi-generational legacy planning reflects specific regional expertise in the Lake Travis and greater Austin area’s higher concentration of large landholdings compared to more purely urban estate planning markets.

Recognition for This Austin Estate Planning Firm

Peer-reviewed and third-party credentials: board certification in Estate Planning and Probate Law from the Texas Board of Legal Specialization for two named partners (Erin Thrash and Hazel Sanchez), and Erin Thrash’s Fellow status with the Austin Bar Association. The firm’s own materials note one attorney additionally holds a Master of Laws (LL.M.) in Taxation, a credential Awesome Attorneys notes as an added specialization in tax-sensitive estate planning beyond the base TBLS certification.

Texas Legal Backdrop

Business succession planning for landowning families — a stated firm specialty — often requires coordinating Texas’s community property and probate framework with entity-level planning tools like family limited partnerships or LLCs, since agricultural and ranch land held across generations can raise distinct valuation and division issues that a purely urban estate plan doesn’t typically encounter. Guardianship proceedings, another firm service, are governed by the Texas Estates Code and require a court finding of incapacity before a guardian can be appointed to manage a person’s affairs, with the law favoring less restrictive alternatives (like powers of attorney set up in advance) where they can adequately protect the person’s interests. None of this is legal advice; a specific succession planning or guardianship matter should be evaluated by a licensed attorney based on the actual assets and family circumstances involved.

Awesome Attorneys Assessment

The clearest, most specific differentiator here is genuine multi-generational client continuity — reviews documenting 13-to-20-year relationships and multi-generation representation within the same families — combined with dual TBLS board certification and a specific regional specialization in landowner and legacy wealth planning that fits the Lake Travis market particularly well. The honest trade-off is that a firm this specifically positioned around long-term relationships and larger landholding families may be a less natural fit for a client seeking a single, low-cost, transactional estate plan without an ongoing relationship. For a family with meaningful land, business, or multi-generational wealth-transfer planning needs — precisely the client base this firm has built its three-decade practice around — that combination of tenure, certification, and documented client retention is a strong basis for a shortlist.

Methodology and Sourcing

This profile was researched from Thrash, Carroll & Sanchez Law Group’s official website (estateplanningaustin.com), Erin Thrash’s Avvo and Cornell LII attorney profiles, the Lake Travis area business directory, and independent third-party review compilations. Client quotes are reproduced from publicly posted, attributed reviews.

Publisher Disclosure and Independence Notice

Awesome Attorneys is an independent legal directory and editorial publication. This profile was not paid for, commissioned, or reviewed by Erin Thrash or Thrash, Carroll & Sanchez Law Group prior to publication. Awesome Attorneys may in the future offer sponsored placement products to attorneys and firms, including this one, but sponsorship has no bearing on the editorial content, inclusion, or findings of this profile.