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William Charles O'Neill, Business Attorney in Costa Mesa, California

Over 19 years of legal practice · focused on Business, Construction, and Employment · 4.9/5 rating from 13 verified client reviews

PartneratRoss Wersching And Wolcott Llp

Costa Mesa, CA

Practicing business in Costa Mesa since 2007.

19+
Years practicing
4.9 ★
13 client reviews
1
Bar admission

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Quick answer

William Charles O'Neill is a partner based in Costa Mesa, CA. The practice focuses on Business, Construction, and Employment. William has over 19 years of legal experience. Currently practicing at Ross Wersching And Wolcott Llp. Rated 4.9 out of 5 from 13 client reviews.

Based in
Costa Mesa, CA
Experience
over 19 years
Known for
Business · Construction · Employment
  • Handles Business, Construction, and Employment matters from Costa Mesa, CA.
  • Over 19 years of practice as a licensed attorney.
  • Recognized with AV Preeminent.

About William Charles O'Neill: William Charles O'Neill is a partner based in Costa Mesa, CA. The practice focuses on Business, Construction, and Employment. William has over 19 years of legal experience. Currently practicing at Ross Wersching And Wolcott Llp. Rated 4.9 out of 5 from 13 client reviews.

Areas of practice

William's practice areas in Costa Mesa

William concentrates on business, construction, employment, entertainment, and litigation. Each area below outlines the kind of case William handles, typical outcomes to expect, and how the intake process starts.

Business cases in Costa Mesa, California

William takes business matters in Costa Mesa, California. 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.

Construction cases in Costa Mesa, California

William takes construction matters in Costa Mesa, California. 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.

Employment cases in Costa Mesa, California

William takes employment matters in Costa Mesa, California. 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.

Entertainment cases in Costa Mesa, California

William takes entertainment matters in Costa Mesa, California. 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 Costa Mesa, California

William takes litigation matters in Costa Mesa, California. 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 Charles O'Neill, business attorney serving Costa Mesa

William Charles O'Neill is a partner based in Costa Mesa, CA. The practice focuses on Business, Construction, and Employment. William has over 19 years of legal experience. Currently practicing at Ross Wersching And Wolcott Llp. Rated 4.9 out of 5 from 13 client reviews. William works from Costa Mesa, California and takes on business matters across the region.

William Charles O'Neill is a lawyer practicing litigation/trial practice, banking and financial services litigation, business litigation and 5 other areas of law. William received a B.A. degree from Stanford University in 2004, and has been licensed for 19 years. William practices at Ross Wersching & Wolcott LLP in Costa Mesa, CA.

William's approach to business cases

William Charles O'Neill is a lawyer practicing litigation/trial practice, banking and financial services litigation, business litigation and 5 other areas of law. William received a B.A. degree from Stanford University in 2004, and has been licensed for 19 years. William practices at Ross Wersching & Wolcott LLP in Costa Mesa, CA.

The kind of cases William takes

William reviews new inquiries case-by-case for business, construction, and employment matters in Costa Mesa and the surrounding California area.

Credentials

Credentials — where William studied and practices

  • Hastings College of the Law, University of California

    J.D. · 2007

  • Stanford University

    B.A. History · 2004

Jurisdictions

William's state bar admissions

  • California U.S. Dist

    2007 · ACTIVE

William studied at J.D. in Hastings College of the Law, University of California and B.A. History in Stanford University.

Law school and academic background

William completed J.D. in Hastings College of the Law, University of California and B.A. History in Stanford University. Formal legal training is one signal of substantive knowledge — the day-to-day practice William runs in California is where that training gets applied to real client questions.

Recognition

William's legal honors and published work

William has received 1 formal recognition from bar associations, industry bodies, and peer-review services.

  • AV Preeminent

Legal awards and honors

AV Preeminent.

Locations

William Charles O'Neill's office in Costa Mesa

William's primary office is at Bldg. S, 3151 Airway Ave., Costa Mesa, CA, 92626. In-person meetings are by appointment; a phone intake usually comes first.

Main office

Ross Wersching And Wolcott Llp

Bldg. S, 3151 Airway Ave.

Costa Mesa, CA 92626

Open in Google Maps

Client feedback

Client reviews of William Charles O'Neill — 4.9/5 rating from 13 verified client reviews

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 Costa Mesa.

4.9

13 client reviews

Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once William Charles O'Neill claims this profile.

Read all reviews

Hiring guide

How to hire William Charles O'Neill — 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 Costa Mesa, California

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 Charles O'Neill

  • 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 California 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 Costa Mesa?

    William is licensed in California. Matters governed by California 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 Costa Mesa, Los Angeles and San Francisco in California

William handles business matters throughout California. Each city below is a direct link into the search page for verified business attorneys in that community.

More counsel

If William's intake is full or the fit isn't right, these business attorneys in Costa Mesa handle similar matters. Every profile below is verified and open to consultations.