Contact Chicago Attorney John O’Leary

Handling Construction Law, Condominium Law, Real Estate Development & Commercial Leasing

Chicago attorney John O’Leary and the team at O’Leary Law Firm are ready to help you now with your construction, condominium, commercial leasing and real estate development law questions or legal matters of all size and scale.

We invite out-of-state contractors and developers who are facing legal issues within Illinois to contact us for assistance.

We offer multiple ways to reach us:

Call Us:  (312) 782-8807

When you call, we respond promptly. We are always happy to answer your legal questions, and look forward to speaking with you about your situation.

Contact Us by Email

Fill out and submit the contact form on each page of our site, and we will get back to you directly.

Visit Our Chicago Law Firm

The O’Leary Law Firm is conveniently located in Chicago’s Loop business district.

O’Leary Law Firm
20 North Clark Street
Suite 600
Chicago, Illinois 60602

Phone: (312) 782.8807

Public Parking Garages

  1. Washington-Madison-Wells Self Park located at 172 West Madison Street 312-704-0068
  2. 201 West Madison Street Self Park 312-960-0700
  3. 120 North La Salle Street Parking – Valet Parking (enter on Wells Street) 312-407-0207
  4. Monroe & Wells Garage 183 West Monroe Street – Valet Parking 312-236-3949
  5. Government Center Self Park – 181 North Clark Street (Clark and Lake ) 312-750-0991
  6. Several parking garages are located in the Millennium Park, Grant Park North, Grant Park South and East Monroe Street area. For rates, directions and other information please visit or call 312-616-0600.

Public Transportation

Our office at 20 North Clark Street, between Washington and Madison, is conveniently located to public transportation. Visit for details.

Map and Directions

How May We Help You?

Legal construction and real estate problems can be difficult to navigate without an experienced Chicago attorney who knows the way. Whether you need to enforce mechanics liens for outstanding balances, litigate a condo association case, or negotiate a real estate development deal, we are here to assist you.

At the O’Leary Law Firm, our clients come first. We take pride in our reputation for superior legal representation. To our clients in Chicago and throughout Illinois, we provide experienced legal counsel regarding construction law, real estate development, commercial leasing, and condominium law matters.

Be sure to check our Resources.

For Construction and Real Estate Problem Resolution or Litigation

Call: (312) 782-8807