William Robert Ahern III, Business Attorney in Irvine, California
Over 28 years of legal practice · focused on Business, Real Estate, and Tax
PartneratAllen Matkins Leck Gamble Mallory And Natsis Llp
Irvine, CA
Practicing business in Irvine since 1998.
- 28+
- Years practicing
- 3
- Bar admissions
Practices in
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Quick answer
William Robert Ahern III is a partner based in Irvine, CA. The practice focuses on Business, Real Estate, and Tax. William has over 28 years of legal experience. Currently practicing at Allen Matkins Leck Gamble Mallory And Natsis Llp.
- Based in
- Irvine, CA
- Experience
- over 28 years
- Known for
- Business · Real Estate · Tax
- Handles Business, Real Estate, and Tax matters from Irvine, CA.
- Over 28 years of practice as a licensed attorney.
About William Robert Ahern III: William Robert Ahern III is a partner based in Irvine, CA. The practice focuses on Business, Real Estate, and Tax. William has over 28 years of legal experience. Currently practicing at Allen Matkins Leck Gamble Mallory And Natsis Llp.
Areas of practice
William's practice areas in Irvine
William concentrates on business, real estate, and tax. 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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Real Estate
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Tax
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Business cases in Irvine, California
William takes business matters in Irvine, 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.
Real Estate cases in Irvine, California
William takes real estate matters in Irvine, 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.
Tax cases in Irvine, California
William takes tax matters in Irvine, 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 Robert Ahern III, business attorney serving Irvine
William Robert Ahern III is a partner based in Irvine, CA. The practice focuses on Business, Real Estate, and Tax. William has over 28 years of legal experience. Currently practicing at Allen Matkins Leck Gamble Mallory And Natsis Llp. William works from Irvine, California and takes on business matters across the region.
William Robert Ahern III is a lawyer practicing tax & joint venture, business law, taxation and 1 other area of law. William received a B.A. degree from The Ohio State University in 1992, and has been licensed for 28 years. William practices at Allen Matkins Leck Gamble Mallory & Natsis LLP in Irvine, CA.
Working with William on a business matter
William Robert Ahern III is a lawyer practicing tax & joint venture, business law, taxation and 1 other area of law. William received a B.A. degree from The Ohio State University in 1992, and has been licensed for 28 years. William practices at Allen Matkins Leck Gamble Mallory & Natsis LLP in Irvine, CA.
Clients William works with
William reviews new inquiries case-by-case for business, real estate, and tax matters in Irvine and the surrounding California area.
Credentials
Credentials — where William studied and practices
New York University School of Law
LL.M. Taxation · 1998
The Ohio State University
B.A. Economics · 1992
Jurisdictions
William's state bar admissions
New York
2024 · ACTIVE
Ohio
1998 · ACTIVE
California
1998 · ACTIVE
William studied at LL.M. Taxation in New York University School of Law and B.A. Economics in The Ohio State University.
Law school and academic background
William completed LL.M. Taxation in New York University School of Law and B.A. Economics in The Ohio State 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.
Locations
William Robert Ahern III's office in Irvine
William's primary office is at 1900 Main Street, 5th Floor, Irvine, CA, 92614-7321. In-person meetings are by appointment; a phone intake usually comes first.
Allen Matkins Leck Gamble Mallory And Natsis Llp
1900 Main Street, 5th Floor
Irvine, CA 92614-7321
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Schedule your consultationHiring guide
How to hire William Robert Ahern III — 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 Irvine, 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 Robert Ahern III
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 Irvine?
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 Irvine, 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.
- Irvine6,831 attorneys
- Los Angeles39,975 attorneys
- San Francisco26,380 attorneys
- San Diego16,903 attorneys
- Sacramento10,561 attorneys
- Oakland5,709 attorneys
- San Jose5,009 attorneys
- Palo Alto4,084 attorneys
- Beverly Hills3,348 attorneys
- Newport Beach3,106 attorneys
- Pasadena2,894 attorneys
- Santa Monica2,756 attorneys
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