Atty. John Mansour

Atty. John Mansour

John Mansour is a lawyer practicing business, construction & development, civil litigation and 2 other areas of law. John received a B.A. degree from University of California at Irvine in 1996, and has been licensed for 27 years.

Rancho Cucamonga Rancho Cucamonga 27 yrs experience 27 year
Call (840) 256-4123 Book Appointment

Business & More Attorney · Serving Rancho Cucamonga, CA · 27+ Years Experience

Profile Summary

About John Mansour at a Glance

John Mansour is a Member based in Rancho Cucamonga, California, practicing at Mansour Law Group. They have 27+ years of legal experience, licensed to practice since 1999. Their practice focuses on business, real estate, bankruptcy, and litigation. Admitted to practice in California (1999). Educated at University of San Diego School of Law (J.D., 1999) and University of California at Irvine (B.A., 1996). Active member of Education Chair, 2000-2002, State Bar of California Building Industry Association Rancho Cucamonga Chamber of Commerce Upland Chamber of Commerce Orange County Bar Association. Serves clients in Rancho Cucamonga, CA and the surrounding metropolitan area.

Verified attorney profile · Updated October 2026

About John Mansour

  • John Mansour is a lawyer practicing business, construction & development, civil litigation and 2 other areas of law
  • John received a B.A. degree from University of California at Irvine in 1996, and has been licensed for 27 years
  • John practices at Mansour Law Group in Rancho Cucamonga, CA

Practice Areas Explained

John Mansour's Areas of Legal Practice

Each practice area below reflects the types of cases John Mansour handles, with a practical overview of what that area of law involves and how it may apply to your situation in Rancho Cucamonga.

Business & Corporate Law in Rancho Cucamonga

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

John Mansour is one of 497,491 business attorneys indexed nationally. Browse business attorneys in California →

Real Estate Law in Rancho Cucamonga

Real estate attorneys handle home purchases, sales, commercial transactions, title disputes, and landlord-tenant matters.

John Mansour is one of 313,729 real estate attorneys indexed nationally. Browse real estate attorneys in California →

Bankruptcy & Debt in Rancho Cucamonga

A bankruptcy attorney can help you eliminate debt, stop creditor harassment, and protect your home through Chapter 7 or Chapter 13.

John Mansour is one of 104,458 bankruptcy attorneys indexed nationally. Browse bankruptcy attorneys in California →

Civil Litigation in Rancho Cucamonga

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

John Mansour is one of 450,751 litigation attorneys indexed nationally. Browse litigation attorneys in California →

Jurisdictional Context

Why Local Counsel Matters in Rancho Cucamonga

Practicing law in California. Legal matters in California are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Rancho Cucamonga are typically filed in the local municipal court or the appropriate California state district court, depending on subject matter and amount in controversy. An attorney licensed in California brings working knowledge of local procedural deadlines, judicial practices in this venue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in California courts without local counsel or pro hac vice admission.

Rancho Cucamonga Courts and Legal Process

Choosing a Rancho Cucamonga-based attorney means your counsel already knows the local docketing timelines, preferred filing formats, and how individual judges typically rule on procedural motions — details that only come from practicing in this jurisdiction day after day. That local familiarity can translate to better strategy, faster filings, and fewer costly surprises.

Looking for additional California attorneys? Browse all attorneys in Rancho Cucamonga or all attorneys in California.

Frequently Asked

Common Questions About John Mansour

Where is John Mansour's law office located?
John Mansour's law practice is located in Rancho Cucamonga, California. The firm is Mansour Law Group. You can contact the office directly through this profile page.
What practice areas does John Mansour handle?
John Mansour focuses on business, real estate, bankruptcy, litigation. Each practice area listed reflects experience handling cases of that type in California.
How long has John Mansour practiced law?
John Mansour has 27+ years of legal experience and has been licensed since 1999.
Where did John Mansour go to law school?
John Mansour earned their education at (J.D., 1999); (B.A., 1996).
How can I contact John Mansour for a consultation?
You can contact John Mansour directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Professional Profile

Why Clients in Rancho Cucamonga Choose John Mansour

Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish John Mansour's practice in the field of business, real estate, bankruptcy, and litigation.

Decade-Tested Legal Experience

John Mansour brings 27+ years of hands-on legal practice — enough to have navigated the recurring fact patterns, procedural traps, and negotiation dynamics that shape case outcomes.

Broad Practice Area Coverage

Covering business, real estate, and bankruptcy, John Mansour can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.

Local Presence in Rancho Cucamonga

A Rancho Cucamonga-based practice means John Mansour attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.

Case Types

Common Legal Issues John Mansour Handles in Rancho Cucamonga

Below is a representative sample of the types of matters John Mansour has experience with under California law. If your situation involves one of these case categories, this attorney may be well positioned to help you understand your options.

Business formation and structure
Business
Contract drafting and review
Business
Partnership disputes
Business
Merger and acquisition support
Business
Residential property transactions
Real Estate
Commercial lease disputes
Real Estate
Title and deed issues
Real Estate
Landlord-tenant conflicts
Real Estate
Chapter 7 liquidation
Bankruptcy
Chapter 13 repayment plans
Bankruptcy
Debt negotiation
Bankruptcy
Creditor harassment defense
Bankruptcy

This list is illustrative, not exhaustive. Contact John Mansour directly to discuss the specifics of your situation.

Search Reference

How People Find John Mansour Online

Prospective clients searching for legal help in Rancho Cucamonga commonly use a combination of the attorney's name and their specific legal need. The following search terms frequently lead people to this profile and to attorneys like John Mansour.

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If any of the above matches what you searched for, you've found the right profile. Use the contact options at the top of this page to get in touch with John Mansour directly.

John Mansour's Practice Areas & Specializations

Education & Law School Background

J.D.
University of San Diego School of Law
- 1999
B.A.
University of California at Irvine
- 1996

Bar Admissions & Licensed Jurisdictions

California
Admitted: 1999

Client Reviews & Ratings — John Mansour

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