Katherine Sullivan Callahan, Probate Attorney in Houston, Texas
Over 43 years of legal practice · focused on Probate, Real Estate, and Trusts
Houston, TX
Practicing probate in Houston since 1983.
- 43+
- Years practicing
- 1
- Bar admission
Practices in
Are you Katherine Sullivan Callahan?
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Quick answer
Katherine Sullivan Callahan is an attorney based in Houston, TX. The practice focuses on Probate, Real Estate, and Trusts. Katherine has over 43 years of legal experience.
- Based in
- Houston, TX
- Experience
- over 43 years
- Known for
- Probate · Real Estate · Trusts
- Handles Probate, Real Estate, and Trusts matters from Houston, TX.
- Over 43 years of practice as a licensed attorney.
About Katherine Sullivan Callahan: Katherine Sullivan Callahan is an attorney based in Houston, TX. The practice focuses on Probate, Real Estate, and Trusts. Katherine has over 43 years of legal experience.
Areas of practice
Practice areas handled by Katherine Sullivan Callahan
Katherine concentrates on probate, real estate, and trusts. Each area below outlines the kind of case Katherine handles, typical outcomes to expect, and how the intake process starts.
Probate
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Real Estate
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Trusts
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Probate cases in Houston, Texas
Katherine takes probate matters in Houston, Texas. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Katherine agrees to represent you.
Real Estate cases in Houston, Texas
Katherine takes real estate matters in Houston, Texas. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Katherine agrees to represent you.
Trusts cases in Houston, Texas
Katherine takes trusts matters in Houston, Texas. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Katherine agrees to represent you.
Biography
About Katherine Sullivan Callahan — Over 43 years of Texas probate experience
Katherine Sullivan Callahan is an attorney based in Houston, TX. The practice focuses on Probate, Real Estate, and Trusts. Katherine has over 43 years of legal experience.
Ms. Katherine Sullivan Callahan is a lawyer practicing real estate, wills-trusts-probate. Katherine Sullivan received a B.A. degree from University of Notre Dame in 1975, and has been licensed for 43 years. Katherine Sullivan practices in Houston, TX.
How Katherine handles probate matters
Ms. Katherine Sullivan Callahan is a lawyer practicing real estate, wills-trusts-probate. Katherine Sullivan received a B.A. degree from University of Notre Dame in 1975, and has been licensed for 43 years. Katherine Sullivan practices in Houston, TX.
The kind of cases Katherine takes
Katherine reviews new inquiries case-by-case for probate, real estate, and trusts matters in Houston and the surrounding Texas area.
Credentials
Katherine Sullivan Callahan's legal education and bar admissions
University of Houston Law Center
J.D. · 1983
University of Notre Dame
B.A. English · 1975
Jurisdictions
Katherine's state bar admissions
Texas Texas Southern
1983 · ACTIVE
Katherine studied at J.D. in University of Houston Law Center and B.A. English in University of Notre Dame.
Law school and academic background
Katherine completed J.D. in University of Houston Law Center and B.A. English in University of Notre Dame. Formal legal training is one signal of substantive knowledge — the day-to-day practice Katherine runs in Texas is where that training gets applied to real client questions.
Locations
Katherine Sullivan Callahan's office in Houston
Katherine's primary office is at 1019 Congress Avenue 15th Floor, Houston, TX, 77002. In-person meetings are by appointment; a phone intake usually comes first.
Client feedback
Client reviews of Katherine Sullivan Callahan
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Schedule your consultationHiring guide
How to hire Katherine Sullivan Callahan — what to expect in your first consultation
Working with a new probate attorney should feel structured. Here's how the first two conversations with Katherine usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Katherine charges for the initial consult. That fee is credited toward representation if you retain Katherine's office.
What to bring to your first meeting
Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; Katherine will tell you what matters and what doesn't.
Questions to ask a probate attorney in Houston, Texas
A short list to run through before you commit: How many probate matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?
Fees & payment
Fees, payment methods, and consultation options for Katherine
Katherine discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in probate practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every probate matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. Katherine confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Katherine's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many probate practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about Katherine Sullivan Callahan
How much does it cost to hire Katherine for a probate case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Katherine walks through the likely range during the consult so there are no surprises.
Does Katherine offer a free consultation?
Katherine charges for the initial consult; that fee is credited toward representation if you retain Katherine's office. Some probate attorneys offer free consults — check Katherine's current terms during booking.
How long do probate cases in Texas typically take?
Simple probate matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. Katherine gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Katherine take my case if I'm outside Houston?
Katherine is licensed in Texas. Matters governed by Texas law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Katherine will tell you if the case is a fit or refer you to someone closer to your court.
What should I bring to my first meeting with Katherine?
Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. Katherine will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Katherine accepting new probate clients right now?
Katherine's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.
Areas served
Probate attorneys serving Houston, Dallas and Austin in Texas
Katherine handles probate matters throughout Texas. Each city below is a direct link into the search page for verified probate attorneys in that community.
More counsel
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If Katherine's intake is full or the fit isn't right, these probate attorneys in Houston handle similar matters. Every profile below is verified and open to consultations.





