JD

Jonathan D. Warren, Litigation Attorney in the United States

Over 26 years of legal practice · focused on Litigation, Tax Litigation, and Wills

AssociateatWarren Tettensor

Practicing litigation since 2000.

26+
Years practicing
1
Bar admission

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Quick answer

Jonathan D. Warren is an associate based in Calgary, AB. The practice focuses on Litigation, Tax Litigation, and Wills. Jonathan has over 26 years of legal experience. Currently practicing at Warren Tettensor.

Based in
Calgary, AB
Experience
over 26 years
Known for
Litigation · Tax Litigation · Wills
  • Handles Litigation, Tax Litigation, and Wills matters from Calgary, AB.
  • Over 26 years of practice as a licensed attorney.

About Jonathan D. Warren: Jonathan D. Warren is an associate based in Calgary, AB. The practice focuses on Litigation, Tax Litigation, and Wills. Jonathan has over 26 years of legal experience. Currently practicing at Warren Tettensor.

Areas of practice

Practice areas handled by Jonathan D. Warren

Jonathan concentrates on litigation, tax litigation, and wills. Each area below outlines the kind of case Jonathan handles, typical outcomes to expect, and how the intake process starts.

Litigation cases nationwide

Jonathan takes litigation matters nationwide. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Jonathan agrees to represent you.

Tax Litigation cases nationwide

Jonathan takes tax litigation matters nationwide. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Jonathan agrees to represent you.

Wills cases nationwide

Jonathan takes wills matters nationwide. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Jonathan agrees to represent you.

Biography

About Jonathan D. Warren — Over 26 years of the U.S. litigation experience

Jonathan D. Warren is an associate based in Calgary, AB. The practice focuses on Litigation, Tax Litigation, and Wills. Jonathan has over 26 years of legal experience. Currently practicing at Warren Tettensor.

Jonathan D. Warren is a lawyer practicing civil litigation, tax litigation, wills. Jonathan D. received a B.S.C. degree from University of Calgary in 1996, and has been licensed for 26 years. Jonathan D. practices at Warren Tettensor in Calgary, AB.

How Jonathan handles litigation matters

Jonathan D. Warren is a lawyer practicing civil litigation, tax litigation, wills. Jonathan D. received a B.S.C. degree from University of Calgary in 1996, and has been licensed for 26 years. Jonathan D. practices at Warren Tettensor in Calgary, AB.

Who Jonathan represents

Jonathan reviews new inquiries case-by-case for litigation, tax litigation, and wills matters in the United States.

Credentials

Jonathan D. Warren's legal education and bar admissions

  • University of Alberta

    LL.B. · 1999

  • University of Calgary

    B.S.C. · 1996

Jurisdictions

Jonathan's state bar admissions

  • Alberta

    2000 · ACTIVE

Jonathan studied at LL.B. in University of Alberta and B.S.C. in University of Calgary.

Law school and academic background

Jonathan completed LL.B. in University of Alberta and B.S.C. in University of Calgary. Formal legal training is one signal of substantive knowledge — the day-to-day practice Jonathan runs in the state is where that training gets applied to real client questions.

Locations

Jonathan D. Warren's office in Calgary

Jonathan's primary office is at 1413 2nd St., S.W., Calgary, AB, T2R 0W7. In-person meetings are by appointment; a phone intake usually comes first.

Main office

Warren Tettensor

1413 2nd St., S.W.

Calgary, AB T2R 0W7

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Client feedback

Client reviews of Jonathan D. Warren

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Hiring guide

How to hire Jonathan D. Warren — what to expect in your first consultation

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

Consultation formats and pricing

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

Questions to ask a litigation attorney in your state

A short list to run through before you commit: How many litigation 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 Jonathan

Jonathan discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in litigation practice — ask which fits.

Hourly rates, contingency fees, and flat-fee options

Every litigation 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. Jonathan confirms the model in the engagement letter before any work starts.

Payment methods and payment plans

Jonathan's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many litigation practices work with clients on structured schedules.

Frequently asked

Frequently asked questions about Jonathan D. Warren

  • How much does it cost to hire Jonathan for a litigation case?

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

  • Does Jonathan offer a free consultation?

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

  • How long do litigation cases in this state typically take?

    Simple litigation 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. Jonathan gives a realistic estimate for your facts at the consult — vague answers here are a red flag.

  • Can Jonathan take my case if I'm outside the area?

    Jonathan evaluates matters case by case. If the venue is outside Jonathan's regular jurisdictions, the intake call will confirm whether direct representation or a referral makes more sense.

  • What should I bring to my first meeting with Jonathan?

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

  • Is Jonathan accepting new litigation clients right now?

    Jonathan's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.