Atty. Douglas John Antonio

Atty. Douglas John Antonio

Douglas John Antonio is a lawyer practicing affordable housing and community development, federal income taxation, partnership and 1 other area of law. Douglas John received a B.S. degree from University of Maryland in 1977, and has been licensed for 46 years.

Chicago Chicago 46 Years Experience 46 year
Call (312) 535-4941

Profile Summary

About Douglas John Antonio at a glance

Douglas John Antonio is a Partner based in Chicago, Illinois, practicing at Sugar Felsenthal Grais & Helsinger LLP. They have 46+ years of legal experience, licensed to practice since 1980. Their practice focuses on business, real estate, and tax. Admitted to practice in Maryland (1980), District of Columbia (1981), Missouri (1983), and Illinois U.S. Tax Court, U.S. Court of Federal Claims and U.S. Supreme Court (1984). Educated at Georgetown University (LL.M. Taxation, 1983) and University of Maryland (B.S. University, 1977). Recognitions include AV Preeminent. Serves clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Douglas John Antonio is a lawyer practicing affordable housing and community development, federal income taxation, partnership and 1 other area of law
  • Douglas John received a B.S. degree from University of Maryland in 1977, and has been licensed for 46 years
  • Douglas John practices at Sugar Felsenthal Grais & Helsinger LLP in Chicago, IL

Practice Areas Explained

Douglas John Antonio's Areas of Practice

Each practice area below reflects the types of cases Douglas John Antonio 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.

Douglas John Antonio is one of 452,854 business attorneys indexed nationally. Browse business attorneys in Illinois →

Real Estate Law

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

Douglas John Antonio is one of 286,061 real estate attorneys indexed nationally. Browse real estate attorneys in Illinois →

Tax Law

Tax attorneys handle IRS audits, tax debt, international tax, estate planning, and tax court litigation.

Douglas John Antonio is one of 77,130 tax attorneys indexed nationally. Browse tax attorneys in Illinois →

Jurisdictional Context

Why local counsel matters in Illinois

Practicing law in Illinois. Legal matters in Illinois are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Chicago are typically filed in the local municipal court or the appropriate Illinois state district court, depending on subject matter and amount in controversy. An attorney licensed in Illinois 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 Illinois courts without local counsel or pro hac vice admission.

Looking for additional Illinois attorneys? Browse all attorneys in Chicago or all attorneys in Illinois.

Frequently Asked

Common questions about Douglas John Antonio

Where is Douglas John Antonio's law office located?
Douglas John Antonio's law practice is located in Chicago, Illinois. The firm is Sugar Felsenthal Grais & Helsinger LLP. You can contact the office directly through this profile page.
What practice areas does Douglas John Antonio handle?
Douglas John Antonio focuses on business, real estate, tax. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has Douglas John Antonio practiced law?
Douglas John Antonio has 46+ years of legal experience and has been licensed since 1980.
Where did Douglas John Antonio go to law school?
Douglas John Antonio earned their education at (LL.M. Taxation, 1983); (B.S. University, 1977).
How can I contact Douglas John Antonio for a consultation?
You can contact Douglas John Antonio 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 Douglas John Antonio received?
Douglas John Antonio's notable recognition includes: AV Preeminent.

Education

LL.M. Taxation
Georgetown University
- 1983
B.S. University
University of Maryland
- 1977

Awards

AV Preeminent

Bar Admissions

Maryland
Admitted: 1980
District of Columbia
Admitted: 1981
Missouri
Admitted: 1983
Illinois U.S. Tax Court, U.S. Court of Federal Claims and U.S. Supreme Court
Admitted: 1984

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