William S. "Bill" Thomas, Construction Attorney in St Louis, Missouri
Gausnell, O'Keefe & Thomas LLC
St Louis, MO
Trusted construction attorney serving St Louis.
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Quick answer
William S. "Bill" Thomas is an attorney based in St. Louis, MISSOURI. The practice focuses on Construction. Currently practicing at Gausnell, O'Keefe & Thomas LLC.
- Based in
- St. Louis, MISSOURI
- Experience
- attorney
- Known for
- Construction
- Handles Construction matters from St. Louis, MISSOURI.
- Recognized with Lawyer of the Year — Construction Law (St. Louis) (2025).
About William S. "Bill" Thomas: William S. "Bill" Thomas is an attorney based in St. Louis, MISSOURI. The practice focuses on Construction. Currently practicing at Gausnell, O'Keefe & Thomas LLC.
Areas of practice
Legal matters William takes on
William concentrates on construction. Each area below outlines the kind of case William handles, typical outcomes to expect, and how the intake process starts.
Construction cases in St Louis, Missouri
William takes construction matters in St Louis, Missouri. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before William agrees to represent you.
Biography
Meet William S. "Bill" Thomas — construction lawyer in St Louis
William S. "Bill" Thomas is an attorney based in St. Louis, MISSOURI. The practice focuses on Construction. Currently practicing at Gausnell, O'Keefe & Thomas LLC.
William S. Thomas is one of the firm’s many experienced trial lawyers. His practice is diverse, with an emphasis in complex litigation. He has tried cases in a number of difficult venues, from the City of St. Louis, Missouri, to Madison and St. Clair Counties, in Illinois, and Federal Court in East St. Louis and St. Louis. He was lead trial counsel in one of the longest civil jury trials in St. Louis County history, which lasted 100 trial days. In addition to his trial practice, Bill is actively involved in a number of professional organizations. He is a former president of the Lawyers Association of St. Louis, the local trial bar. He is active in the Defense Research Institute, (DRI), serving on its Products Liability Committee, and that committee’s Building Products and Power Tool Specialized Litigation Groups, where he has spoken at DRI conferences. He is active in the DRI’s Construction Committee, and Professional Liability Committee, where he serves on their Design Professional Subcommittees. He has authored a number of articles for the DRI’s monthly publication, For the Defense. He is an extensive author and speaker on a number of topics from products liability to construction law issues.
How William handles construction matters
William S. Thomas is one of the firm’s many experienced trial lawyers. His practice is diverse, with an emphasis in complex litigation. He has tried cases in a number of difficult venues, from the City of St. Louis, Missouri, to Madison and St. Clair Counties, in Illinois, and Federal Court in East St. Louis and St. Louis. He was lead trial counsel in one of the longest civil jury trials in St.…
The kind of cases William takes
William reviews new inquiries case-by-case for construction matters in St Louis and the surrounding Missouri area.
Credentials
Education, bar admissions, and languages
Saint Louis University
JD · 1994
University of Notre Dame
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Jurisdictions
William's state bar admissions
Missouri, Missouri
ACTIVE
Illinois, Illinois
ACTIVE
William studied at JD in Saint Louis University and — in University of Notre Dame.
Law school and academic background
William completed JD in Saint Louis University and — in University of Notre Dame. Formal legal training is one signal of substantive knowledge — the day-to-day practice William runs in Missouri is where that training gets applied to real client questions.
Recognition
Recognition and thought leadership
William has received 10 formal recognitions from bar associations, industry bodies, and peer-review services.
Lawyer of the Year — Construction Law (St. Louis)
2025
Lawyer of the Year — Construction Law (St. Louis)
2023
Lawyer of the Year — Litigation - Construction (St. Louis)
2022
Best Lawyers in America — Construction Law
2026
Best Lawyers in America — Litigation - Construction
2026
Best Lawyers in America — Additional Areas of Practice:
2026
Best Lawyers in America — Litigation - Environmental
2026
Best Lawyers in America — Medical Malpractice Law - Defendants
2026
Best Lawyers in America — Product Liability Litigation - Defendants
2026
Best Lawyers in America — Professional Malpractice Law - Defendants
2026
Legal awards and honors
Lawyer of the Year — Construction Law (St. Louis) (2025). Lawyer of the Year — Construction Law (St. Louis) (2023). Lawyer of the Year — Litigation - Construction (St. Louis) (2022). Best Lawyers in America — Construction Law (2026). Best Lawyers in America — Litigation - Construction (2026). Best Lawyers in America — Additional Areas of Practice: (2026).
Locations
William S. "Bill" Thomas's office in St. Louis
William's primary office is at 1717 Park Avenue, St. Louis, Missouri, 63104. In-person meetings are by appointment; a phone intake usually comes first.
Gausnell, O'Keefe & Thomas LLC
1717 Park Avenue
St. Louis, Missouri 63104
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Schedule your consultationHiring guide
How to hire William S. "Bill" Thomas — what to expect in your first consultation
Working with a new construction attorney should feel structured. Here's how the first two conversations with William usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
William charges for the initial consult. That fee is credited toward representation if you retain William'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; William will tell you what matters and what doesn't.
Questions to ask a construction attorney in St Louis, Missouri
A short list to run through before you commit: How many construction 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 William
William discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in construction practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every construction 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. William confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
William's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many construction practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about William S. "Bill" Thomas
How much does it cost to hire William for a construction case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. William walks through the likely range during the consult so there are no surprises.
Does William offer a free consultation?
William charges for the initial consult; that fee is credited toward representation if you retain William's office. Some construction attorneys offer free consults — check William's current terms during booking.
How long do construction cases in Missouri typically take?
Simple construction 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. William gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can William take my case if I'm outside St Louis?
William is licensed in Missouri. Matters governed by Missouri law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — William 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 William?
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. William will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is William accepting new construction clients right now?
William's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.
Areas served
Construction attorneys serving St Louis, Jefferson City and Kansas City in Missouri
William handles construction matters throughout Missouri. Each city below is a direct link into the search page for verified construction attorneys in that community.
More counsel
Other top-rated construction attorneys in Missouri
If William's intake is full or the fit isn't right, these construction attorneys in St Louis handle similar matters. Every profile below is verified and open to consultations.





