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Experienced Legal Advocacy in Chicagoland
The Peter Delongis Law Offices has provided clients with over 35 years of legal experience in state and federal court systems. Our firm specializes in commercial litigation, family law, personal injury, and criminal defense, representing individuals, families, and businesses throughout the Chicagoland area. With a focus on aggressive advocacy and client-centered service, we prioritize timely resolutions while maintaining approachability and accessibility.

Our team combines decades of litigation expertise with a commitment to affordable, efficient representation, distinguishing us from oversized firms that often over-bill and prolong cases. We serve DuPage, Cook, Will, and Kane Counties, offering free initial consultations to assess cases and guide clients through the legal process.
Services
Commercial Litigation Family Law Personal Injury Criminal Defense Breach of Contract
Highlights and features
  • We offer over 35 years of litigation experience in state and federal courts.
  • Our firm handles complex cases against large Chicago law firms.
  • Free initial consultations provide honest case assessments.
  • A former felony prosecutor leads our criminal defense practice.
  • We serve DuPage, Cook, Will, and Kane Counties with local expertise.
Services
Commercial Litigation
We handle complex commercial disputes including breach of contract, business fraud, and real estate litigation. Our firm represents clients in arbitration, mediation, and court proceedings against large law firms. With decades of experience, we provide cost-effective solutions for high-value cases in DuPage and Cook Counties.
Family Law
Our family law practice covers divorce, child custody, and property division. We offer compassionate yet aggressive representation to protect client interests. We prioritize timely resolutions while guiding clients through emotionally challenging legal processes in Kane and Will Counties.
Personal Injury
We advocate for clients injured in car accidents, medical malpractice, and construction incidents. Our firm secures compensation for medical expenses and lost wages. With a track record of high-dollar judgments, we handle cases from slip-and-falls to wrongful death in Chicagoland.
Criminal Defense
Our criminal defense team represents clients facing felony and misdemeanor charges. A former prosecutor leads our practice, focusing on charge reduction and dismissal. We protect client rights in cases ranging from DUIs to white-collar crimes across Illinois.
Breach of Contract
We resolve breach of contract disputes through negotiation or litigation. Our firm analyzes agreements, identifies breaches, and pursues damages or contract enforcement. We handle cases involving business agreements, non-compete clauses, and construction contracts in Northern Illinois.
People
Peter M. DeLongis
Founding Partner
With over 35 years of litigation experience, Peter M. DeLongis specializes in commercial litigation, family law, and criminal defense. A former felony prosecutor, he provides aggressive advocacy for clients in Chicagoland.
Joseph L. Ponsetto
Of Counsel
Joseph L. Ponsetto supports the firm's litigation and legal strategy efforts. His practice focuses on complex legal matters requiring detailed analysis and courtroom preparation in Illinois.
Questions
What areas of law do you specialize in?
We specialize in commercial litigation, family law, personal injury, criminal defense, and breach of contract cases.
Do you offer free consultations?
Yes, we provide free initial consultations to review your case and discuss legal options.
Which counties do you serve?
We serve DuPage, Cook, Kane, and Will Counties, as well as the broader Chicagoland area.
How much experience do you have?
Our firm offers over 35 years of litigation experience in state and federal courts.
Can you handle complex commercial disputes?
Yes, we routinely handle complex commercial litigation against large law firms in high-value cases.
What is your approach to family law cases?
We combine compassionate guidance with aggressive representation to resolve family law matters efficiently.