William J. O'Brien II, Business Attorney in Philadelphia, Pennsylvania
Over 44 years of legal practice · focused on Business, Estate Planning, and Litigation · 5.0/5 rating from 1 verified client review
MemberatWilliam J. O'Brien, II
Philadelphia, PA
Practicing business in Philadelphia since 1982.
- 44+
- Years practicing
- 5.0 ★
- 1 client review
- 3
- Bar admissions
Are you William J. O'Brien II?
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Quick answer
William J. O'Brien II is a member based in Philadelphia, PA. The practice focuses on Business, Estate Planning, and Litigation. William has over 44 years of legal experience. Currently practicing at William J. O'Brien, II. Rated 5.0 out of 5 from 1 client review.
- Based in
- Philadelphia, PA
- Experience
- over 44 years
- Known for
- Business · Estate Planning · Litigation
- Handles Business, Estate Planning, and Litigation matters from Philadelphia, PA.
- Over 44 years of practice as a licensed attorney.
- Recognized with AV Preeminent.
About William J. O'Brien II: William J. O'Brien II is a member based in Philadelphia, PA. The practice focuses on Business, Estate Planning, and Litigation. William has over 44 years of legal experience. Currently practicing at William J. O'Brien, II. Rated 5.0 out of 5 from 1 client review.
Areas of practice
Practice areas handled by William J. O'Brien II
William concentrates on business, estate planning, litigation, probate, and real estate. Each area below outlines the kind of case William handles, typical outcomes to expect, and how the intake process starts.
Business
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Estate Planning
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Litigation
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Probate
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Real Estate
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Securities
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Consumer
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Business cases in Philadelphia, Pennsylvania
William takes business matters in Philadelphia, Pennsylvania. 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.
Estate Planning cases in Philadelphia, Pennsylvania
William takes estate planning matters in Philadelphia, Pennsylvania. 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.
Litigation cases in Philadelphia, Pennsylvania
William takes litigation matters in Philadelphia, Pennsylvania. 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 Philadelphia, Pennsylvania
William takes probate matters in Philadelphia, Pennsylvania. 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.
Real Estate cases in Philadelphia, Pennsylvania
William takes real estate matters in Philadelphia, Pennsylvania. 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
About William J. O'Brien II — Over 44 years of Pennsylvania business experience
William J. O'Brien II is a member based in Philadelphia, PA. The practice focuses on Business, Estate Planning, and Litigation. William has over 44 years of legal experience. Currently practicing at William J. O'Brien, II. Rated 5.0 out of 5 from 1 client review.
William J. O'Brien II is a lawyer practicing real estate law, banking, probate and 3 other areas of law. William received a B.A. degree from Merrimack College in 1976, and has been licensed for 44 years. William practices at William J. O'Brien, II in Philadelphia, PA.
How William handles business matters
William J. O'Brien II is a lawyer practicing real estate law, banking, probate and 3 other areas of law. William received a B.A. degree from Merrimack College in 1976, and has been licensed for 44 years. William practices at William J. O'Brien, II in Philadelphia, PA.
The kind of cases William takes
William reviews new inquiries case-by-case for business, estate planning, and litigation matters in Philadelphia and the surrounding Pennsylvania area.
Credentials
William J. O'Brien II's legal education and bar admissions
Delaware Law School of Widener University
J.D. · 1981
Merrimack College
B.A. · 1976
Jurisdictions
William's state bar admissions
U.S. Supreme Court
1986 · ACTIVE
U.S. District Court,
1983 · ACTIVE
Pennsylvania
1982 · ACTIVE
William studied at J.D. in Delaware Law School of Widener University and B.A. in Merrimack College.
Law school and academic background
William completed J.D. in Delaware Law School of Widener University and B.A. in Merrimack College. Formal legal training is one signal of substantive knowledge — the day-to-day practice William runs in Pennsylvania is where that training gets applied to real client questions.
Recognition
Awards, publications, and recognition of William J. O'Brien II
William has received 1 formal recognition from bar associations, industry bodies, and peer-review services.
AV Preeminent
Legal awards and honors
AV Preeminent.
Affiliations
William's professional memberships and bar associations
Philadelphia (Member: Municipal, Zoning and Real Property Committees) and Philadelphia (Member, Real Property Section) Bar Associations
membership
Locations
William J. O'Brien II's office in Philadelphia
William's primary office is at 4322 Main St., Philadelphia, PA, 19127. In-person meetings are by appointment; a phone intake usually comes first.
Client feedback
Client reviews of William J. O'Brien II — 5.0/5 rating from 1 verified client review
Every review below is from a verified client of William. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing business attorneys in Philadelphia.
5.0
1 client review
Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once William J. O'Brien II claims this profile.
Read all reviewsHiring guide
How to hire William J. O'Brien II — what to expect in your first consultation
Working with a new business 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 business attorney in Philadelphia, Pennsylvania
A short list to run through before you commit: How many business 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 business practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every business 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 business practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about William J. O'Brien II
How much does it cost to hire William for a business 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 business attorneys offer free consults — check William's current terms during booking.
How long do business cases in Pennsylvania typically take?
Simple business 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 Philadelphia?
William is licensed in Pennsylvania. Matters governed by Pennsylvania 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 business 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
Business attorneys serving Philadelphia, Pittsburgh and Harrisburg in Pennsylvania
William handles business matters throughout Pennsylvania. Each city below is a direct link into the search page for verified business attorneys in that community.
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