About
Constantine G. Tzamouranis is the founder and owner of the firm. He concentrates his practice on business, estate planning, real estate, litigation, and transactional matters. He counsels businesses, owners, and individuals. His work includes corporate planning, property matters, contracts, disputes, and long-term legal planning for many clients.
Constantine earned his J.D. from John Marshall Law School in 2000. He earned his B.S. in Commerce from DePaul University in 1995. His education supports his broad legal practice. He uses this background to guide clients through business, estate, real estate, tax, probate, and litigation matters.
Constantine has extensive experience with ordinary and complex business matters. He advises clients on business formation, operation, and succession planning. He also handles mergers, acquisitions, joint ventures, shareholder agreements, and buy-sell agreements. His work includes contract negotiations, shareholder control issues, employment matters, and the purchase or sale of businesses.
Constantine also counsels clients on estate planning and administration. He helps individuals, business owners, professionals, executives, retirees, and families. His work includes asset protection, special needs planning, and planning for the elderly. He also guides families through probate, trust administration, and post-mortem estate settlement matters.
Constantine represents owners, individuals, and developers in real estate matters. His work includes residential and commercial properties. He handles purchases, sales, developments, joint ventures, financing, and leasing. He also represents clients in litigation involving breaches of contract, business disputes, shareholder disputes, employment issues, evictions, and real property disputes.
Constantine G. Tzamouranis counsels clients in industries such as hospitality, manufacturing, medical, professional services, and real estate. He has also served as pro bono general counsel for various not-for-profit organizations. He is a member of the Illinois State Bar Association and the DuPage County Bar Association.
Law Office Affiliations
- Founder, The Law Office of Constantine G. Tzamouranis, P.C.
- Member, Illinois State Bar Association
- Member, DuPage County Bar Association
Licensed State
- Illinois
Education
- John Marshall Law School
Juris Doctor (JD) - DePaul University
Bachelor of Science (BS)
Awards & Badges


- Contracts & Agreements
- Corporate & Incorporation
- Franchise, Dealership & Partnership
- Mergers & Acquisitions
- Tax
- Venture Capital
- Probate
- Trusts
- Commercial Real Estate
- Construction & Development




