
William C. Trevillian, Sr., Criminal Defense Attorney in Severn, Maryland
Over 46 years of legal practice · focused on Criminal Defense, DUI/DWI, and Family Law
Managing PartneratLaw Offices of William C. Trevillian, P.A.
Severn, MD
Practicing criminal defense in Severn since 1980.
- 46+
- Years practicing
- 2
- Bar admissions
Practices in
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Quick answer
William C. Trevillian, Sr. is a managing partner based in Severn, MD. The practice focuses on Criminal Defense, DUI/DWI, and Family Law. William has over 46 years of legal experience. Currently practicing at Law Offices of William C. Trevillian, P.A..
- Based in
- Severn, MD
- Experience
- over 46 years
- Known for
- Criminal Defense · DUI/DWI · Family Law
- Handles Criminal Defense, DUI/DWI, and Family Law matters from Severn, MD.
- Over 46 years of practice as a licensed attorney.
About William C. Trevillian, Sr.: William C. Trevillian, Sr. is a managing partner based in Severn, MD. The practice focuses on Criminal Defense, DUI/DWI, and Family Law. William has over 46 years of legal experience. Currently practicing at Law Offices of William C. Trevillian, P.A..
Areas of practice
William's practice areas in Severn
William concentrates on criminal defense, dui/dwi, family law, and probate. Each area below outlines the kind of case William handles, typical outcomes to expect, and how the intake process starts.
Criminal Defense
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DUI/DWI
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Family Law
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Probate
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Criminal Defense cases in Severn, Maryland
William takes criminal defense matters in Severn, Maryland. 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.
DUI/DWI cases in Severn, Maryland
William takes dui/dwi matters in Severn, Maryland. 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.
Family Law cases in Severn, Maryland
William takes family law matters in Severn, Maryland. 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.
Probate cases in Severn, Maryland
William takes probate matters in Severn, Maryland. 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
William C. Trevillian, Sr., criminal defense attorney serving Severn
William C. Trevillian, Sr. is a managing partner based in Severn, MD. The practice focuses on Criminal Defense, DUI/DWI, and Family Law. William has over 46 years of legal experience. Currently practicing at Law Offices of William C. Trevillian, P.A.. William works from Severn, Maryland and takes on criminal defense matters across the region.
How William handles criminal defense matters
Mr. William C. Trevillian, Sr. practices at Law Offices of William C. Trevillian, P.A. Read Full Bio
Who William represents
William reviews new inquiries case-by-case for criminal defense, dui/dwi, and family law matters in Severn and the surrounding Maryland area.
Credentials
Credentials — where William studied and practices
University of Baltimore
J.D. · 1979
University of Baltimore
B.S. · 1977
Jurisdictions
William's state bar admissions
U.S. District Court,
1990 · ACTIVE
Maryland
1980 · ACTIVE
William studied at J.D. in University of Baltimore and B.S. in University of Baltimore.
Law school and academic background
William completed J.D. in University of Baltimore and B.S. in University of Baltimore. Formal legal training is one signal of substantive knowledge — the day-to-day practice William runs in Maryland is where that training gets applied to real client questions.
Locations
William C. Trevillian, Sr.'s office in Severn
William's primary office is at 7865 Quarterfield Road, Severn, MD, 21144. In-person meetings are by appointment; a phone intake usually comes first.
Law Offices of William C. Trevillian, P.A.
7865 Quarterfield Road
Severn, MD 21144
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Schedule your consultationHiring guide
How to hire William C. Trevillian, Sr. — what to expect in your first consultation
Working with a new criminal defense 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 criminal defense attorney in Severn, Maryland
A short list to run through before you commit: How many criminal defense 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 criminal defense practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every criminal defense 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 criminal defense practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about William C. Trevillian, Sr.
How much does it cost to hire William for a criminal defense 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 criminal defense attorneys offer free consults — check William's current terms during booking.
How long do criminal defense cases in Maryland typically take?
Simple criminal defense 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 Severn?
William is licensed in Maryland. Matters governed by Maryland 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 criminal defense 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
Criminal Defense attorneys serving Severn, Baltimore and Annapolis in Maryland
William handles criminal defense matters throughout Maryland. Each city below is a direct link into the search page for verified criminal defense attorneys in that community.
More counsel
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