Atty. William Sidney Caspari

Atty. William Sidney Caspari

William Sidney Caspari is a lawyer practicing professional malpractice, litigation, privacy law and 5 other areas of law. William received a B.A. degree from University of California at Los Angeles in 1975, and has been licensed for 41 years.

San Francisco San Francisco 41 yrs experience 41 year
Call (628) 218-5282 Book Appointment

Profile Summary

About William Sidney Caspari at a glance

William Sidney Caspari is a Member based in San Francisco, California, practicing at William S Caspari. They have 41+ years of legal experience, licensed to practice since 1985. Their practice focuses on business, real estate, construction, litigation, and internet. Admitted to practice in California (1985) and U.S. District Court, Northern, Central and Eastern Districts of California and U.S. Court of Appeals (1985). Educated at Boalt Hall School of Law, University of California (J.D., 1985) and University of California at Los Angeles (B.A., 1975). Recognitions include BV Distinguished. Active member of State Bar of California. Serands clients in San Francisco, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William Sidney Caspari is a lawyer practicing professional malpractice, litigation, privacy law and 5 other areas of law
  • William received a B.A. degree from University of California at Los Angeles in 1975, and has been licensed for 41 years
  • William practices at William S. Caspari in San Francisco, CA

Practice Areas Explained

William Sidney Caspari's Areas of Practice

Each practice area below reflects the types of cases William Sidney Caspari handles, with a brief overview of what that area of law covers.

Business & Corporate Law

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

William Sidney Caspari is one of 501,317 business attorneys indexed nationally. Browse business attorneys in California →

Real Estate Law

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

William Sidney Caspari is one of 316,149 real estate attorneys indexed nationally. Browse real estate attorneys in California →

Construction Law

William Sidney Caspari is one of 40,689 construction attorneys indexed nationally. Browse construction attorneys in California →

Civil Litigation

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

William Sidney Caspari is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in California →

Internet & Cyber Law

Internet and cyber lawyers for data breaches, online defamation, privacy law, and cybersecurity matters.

William Sidney Caspari is one of 17,958 internet attorneys indexed nationally. Browse internet attorneys in California →

Jurisdictional Context

Why local counsel matters in California

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 San Francisco 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 andnue, 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.

Looking for additional California attorneys? Browse all attorneys in San Francisco or all attorneys in California.

Frequently Asked

Common questions about William Sidney Caspari

Where is William Sidney Caspari's law office located?
William Sidney Caspari's law practice is located in San Francisco, California. The firm is William S Caspari. You can contact the office directly through this profile page.
What practice areas does William Sidney Caspari handle?
William Sidney Caspari focuses on business, real estate, construction, litigation, internet. Each practice area listed reflects experience handling cases of that type in California.
How long has William Sidney Caspari practiced law?
William Sidney Caspari has 41+ years of legal experience and has been licensed since 1985.
Where did William Sidney Caspari go to law school?
William Sidney Caspari earned their education at (J.D., 1985); (B.A., 1975).
How can I contact William Sidney Caspari for a consultation?
You can contact William Sidney Caspari 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.
What awards or recognition has William Sidney Caspari received?
William Sidney Caspari's notable recognition includes: BV Distinguished.

Education

J.D.
Boalt Hall School of Law, University of California
- 1985
B.A.
University of California at Los Angeles
- 1975

Awards

BV Distinguished

Bar Admissions

California
Admitted: 1985
U.S. District Court, Northern, Central and Eastern Districts of California and U.S. Court of Appeals
Admitted: 1985

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