John J. Duffy

John J. Duffy, Construction Attorney in Woodland Hills, California

Over 46 years of legal practice · focused on Construction, Education, and Employment · 5.0/5 rating from 1 verified client review

PartneratGrayduffy Llp

Woodland Hills, CA

Practicing construction in Woodland Hills since 1980.

46+
Years practicing
5.0 ★
1 client review
3
Bar admissions

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Quick answer

John J. Duffy is a partner based in Woodland Hills, CA. The practice focuses on Construction, Education, and Employment. John has over 46 years of legal experience. Currently practicing at Grayduffy Llp. Rated 5.0 out of 5 from 1 client review.

Based in
Woodland Hills, CA
Experience
over 46 years
Known for
Construction · Education · Employment
  • Handles Construction, Education, and Employment matters from Woodland Hills, CA.
  • Over 46 years of practice as a licensed attorney.
  • Recognized with AV Preeminent.

About John J. Duffy: John J. Duffy is a partner based in Woodland Hills, CA. The practice focuses on Construction, Education, and Employment. John has over 46 years of legal experience. Currently practicing at Grayduffy Llp. Rated 5.0 out of 5 from 1 client review.

Areas of practice

Legal matters John takes on

John concentrates on construction, education, employment, general, and insurance. Each area below outlines the kind of case John handles, typical outcomes to expect, and how the intake process starts.

Construction cases in Woodland Hills, California

John takes construction matters in Woodland Hills, 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 John agrees to represent you.

Education cases in Woodland Hills, California

John takes education matters in Woodland Hills, 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 John agrees to represent you.

Employment cases in Woodland Hills, California

John takes employment matters in Woodland Hills, 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 John agrees to represent you.

General cases in Woodland Hills, California

John takes general matters in Woodland Hills, 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 John agrees to represent you.

Insurance cases in Woodland Hills, California

John takes insurance matters in Woodland Hills, 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 John agrees to represent you.

Biography

Meet John J. Duffy — construction lawyer in Woodland Hills

John J. Duffy is a partner based in Woodland Hills, CA. The practice focuses on Construction, Education, and Employment. John has over 46 years of legal experience. Currently practicing at Grayduffy Llp. Rated 5.0 out of 5 from 1 client review.

John Duffy, co-founder of Gray•Duffy, LLP, has a practice which covers a broad spectrum of civil litigation matters, including insurance, construction defect, education, medical and legal malpractice, and employment law. He has extensive trial and litigation experience, representing clients in more than 50 jury trials, and in hundreds of hearings and arbitrations. Mr. Duffy also serves as a mediator assisting parties in privately resolving their disputes.

Most recently, Mr. Duffy has successfully defended business owners, property owners and individuals in various civil lawsuits in State and Federal Court arising out of serious personal injuries and property damage claims. As a former high school teacher, he also has unique familiarity with education law, having previously represented the Los Angeles Unified School District as well as numerous private schools.

Mr. Duffy obtained his Juris Doctorate from Southwestern University School of Law in Los Angeles and received his undergraduate degree from the University of Notre Dame completing a double major in Political Science and Economics. While attending law school, he received practical trial experience with the Los Angeles County District Attorney's office trying cases. Prior to attending law school, Mr. Duffy served in the U.S. Army. He is also a native of New Jersey.

He is admitted to practice law in California and was previously admitted in New Jersey. He is also admitted to the United States District Court, Central District of California and the U.S. District Court for the District of New Jersey.

Mr. Duffy teaches Insurance Law at Ventura College of Law.

Mr. Duffy conducts mediations and arbitrations for the Los Angeles Superior Court, and serves as a Judge Pro Tem in the Los Angeles Superior Court. He regularly participates on industry panels and speaks on subjects including risk management and other insurance litigation topics.

John's approach to construction cases

John Duffy, co-founder of Gray•Duffy, LLP, has a practice which covers a broad spectrum of civil litigation matters, including insurance, construction defect, education, medical and legal malpractice, and employment law. He has extensive trial and litigation experience, representing clients in more than 50 jury trials, and in hundreds of hearings and arbitrations. Mr. Duffy also serves as a…

Clients John works with

John reviews new inquiries case-by-case for construction, education, and employment matters in Woodland Hills and the surrounding California area.

Credentials

Education, bar admissions, and languages

  • Southwestern University

    J.D. · 1979

  • University of Notre Dame

    B.A. · 1973

Jurisdictions

John's state bar admissions

  • New Jersey

    1982 · ACTIVE

  • U.S. District Court,

    1982 · ACTIVE

  • California

    1980 · ACTIVE

John studied at J.D. in Southwestern University and B.A. in University of Notre Dame.

Law school and academic background

John completed J.D. in Southwestern University and B.A. in University of Notre Dame. Formal legal training is one signal of substantive knowledge — the day-to-day practice John runs in California is where that training gets applied to real client questions.

Recognition

Recognition and thought leadership

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

  • AV Preeminent

Legal awards and honors

AV Preeminent.

Affiliations

John's professional memberships and bar associations

  • San Fernando Valley Bar Association, Los Angeles County Bar Association, State Bar of California, Association of Southern California Defense Counsel

    membership

Locations

John J. Duffy's office in Woodland Hills

John's primary office is at 21700 Oxnard Street, Suite 1950, Woodland Hills, CA, 91436. In-person meetings are by appointment; a phone intake usually comes first.

Main office

Grayduffy Llp

21700 Oxnard Street, Suite 1950

Woodland Hills, CA 91436

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Client feedback

Client reviews of John J. Duffy — 5.0/5 rating from 1 verified client review

Every review below is from a verified client of John. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing construction attorneys in Woodland Hills.

5.0

1 client review

Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once John J. Duffy claims this profile.

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Hiring guide

How to hire John J. Duffy — what to expect in your first consultation

Working with a new construction attorney should feel structured. Here's how the first two conversations with John usually go, from the moment you request a consult to the day representation begins.

Consultation formats and pricing

John charges for the initial consult. That fee is credited toward representation if you retain John'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; John will tell you what matters and what doesn't.

Questions to ask a construction attorney in Woodland Hills, California

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 John

John 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. John confirms the model in the engagement letter before any work starts.

Payment methods and payment plans

John'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 John J. Duffy

  • How much does it cost to hire John for a construction case?

    Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. John walks through the likely range during the consult so there are no surprises.

  • Does John offer a free consultation?

    John charges for the initial consult; that fee is credited toward representation if you retain John's office. Some construction attorneys offer free consults — check John's current terms during booking.

  • How long do construction cases in California 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. John gives a realistic estimate for your facts at the consult — vague answers here are a red flag.

  • Can John take my case if I'm outside Woodland Hills?

    John 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 — John 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 John?

    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. John will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.

  • Is John accepting new construction clients right now?

    John'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 Woodland Hills, Los Angeles and San Francisco in California

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

More counsel

If John's intake is full or the fit isn't right, these construction attorneys in Woodland Hills handle similar matters. Every profile below is verified and open to consultations.