William Mosconi, Business Attorney in Northbrook, Illinois
Over 35 years of legal practice · focused on Business, General, and Litigation · 5.0/5 rating from 2 verified client reviews
AttorneyatDefrenza Mosconi, PC
Northbrook, IL
Practicing business in Northbrook since 1991.
- 35+
- Years practicing
- 5.0 ★
- 2 client reviews
- 1
- Bar admission
Are you William Mosconi?
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Quick answer
William Mosconi is an attorney based in Northbrook, IL. The practice focuses on Business, General, and Litigation. William has over 35 years of legal experience. Currently practicing at Defrenza Mosconi, PC. Rated 5.0 out of 5 from 2 client reviews.
- Based in
- Northbrook, IL
- Experience
- over 35 years
- Known for
- Business · General · Litigation
- Handles Business, General, and Litigation matters from Northbrook, IL.
- Over 35 years of practice as a licensed attorney.
About William Mosconi: William Mosconi is an attorney based in Northbrook, IL. The practice focuses on Business, General, and Litigation. William has over 35 years of legal experience. Currently practicing at Defrenza Mosconi, PC. Rated 5.0 out of 5 from 2 client reviews.
Areas of practice
William's practice areas in Northbrook
William concentrates on business, general, litigation, personal injury, and real estate. Each area below outlines the kind of case William handles, typical outcomes to expect, and how the intake process starts.
Business
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General
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Litigation
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Personal Injury
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Real Estate
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Business cases in Northbrook, Illinois
William takes business matters in Northbrook, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before William agrees to represent you.
General cases in Northbrook, Illinois
William takes general matters in Northbrook, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before William agrees to represent you.
Litigation cases in Northbrook, Illinois
William takes litigation matters in Northbrook, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before William agrees to represent you.
Personal Injury cases in Northbrook, Illinois
William takes personal injury matters in Northbrook, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before William agrees to represent you.
Real Estate cases in Northbrook, Illinois
William takes real estate matters in Northbrook, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before William agrees to represent you.
Biography
William Mosconi, business attorney serving Northbrook
William Mosconi is an attorney based in Northbrook, IL. The practice focuses on Business, General, and Litigation. William has over 35 years of legal experience. Currently practicing at Defrenza Mosconi, PC. Rated 5.0 out of 5 from 2 client reviews. William works from Northbrook, Illinois and takes on business matters across the region.
William Mosconi is a lawyer practicing real estate, litigation, general practice and 3 other areas of law. William received a B.S. degree from Loyola University in 1987, and has been licensed for 35 years. William practices at Defrenza Mosconi, PC in Northbrook, IL.
William's approach to business cases
William Mosconi is a lawyer practicing real estate, litigation, general practice and 3 other areas of law. William received a B.S. degree from Loyola University in 1987, and has been licensed for 35 years. William practices at Defrenza Mosconi, PC in Northbrook, IL.
Clients William works with
William reviews new inquiries case-by-case for business, general, and litigation matters in Northbrook and the surrounding Illinois area.
Credentials
Credentials — where William studied and practices
John Marshall Law School
J.D. · 1991
Loyola University
B.S. · 1987
Jurisdictions
William's state bar admissions
Illinois
1991 · ACTIVE
William studied at J.D. in John Marshall Law School and B.S. in Loyola University.
Law school and academic background
William completed J.D. in John Marshall Law School and B.S. in Loyola University. Formal legal training is one signal of substantive knowledge — the day-to-day practice William runs in Illinois is where that training gets applied to real client questions.
Locations
William Mosconi's office in Northbrook
William's primary office is at 707 Skokie Blvd., Ste. 410, Northbrook, IL, 60062-2839. In-person meetings are by appointment; a phone intake usually comes first.
Defrenza Mosconi, PC
707 Skokie Blvd., Ste. 410
Northbrook, IL 60062-2839
Open in Google MapsClient feedback
Client reviews of William Mosconi — 5.0/5 rating from 2 verified client reviews
Every review below is from a verified client of William. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing business attorneys in Northbrook.
5.0
2 client reviews
Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once William Mosconi claims this profile.
Read all reviewsHiring guide
How to hire William Mosconi — what to expect in your first consultation
Working with a new business attorney should feel structured. Here's how the first two conversations with William usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
William charges for the initial consult. That fee is credited toward representation if you retain William's office.
What to bring to your first meeting
Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; William will tell you what matters and what doesn't.
Questions to ask a business attorney in Northbrook, Illinois
A short list to run through before you commit: How many business matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?
Fees & payment
Fees, payment methods, and consultation options for William
William discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in business practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every business matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. William confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
William's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many business practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about William Mosconi
How much does it cost to hire William for a business case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. William walks through the likely range during the consult so there are no surprises.
Does William offer a free consultation?
William charges for the initial consult; that fee is credited toward representation if you retain William's office. Some business attorneys offer free consults — check William's current terms during booking.
How long do business cases in Illinois typically take?
Simple business matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. William gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can William take my case if I'm outside Northbrook?
William is licensed in Illinois. Matters governed by Illinois law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — William will tell you if the case is a fit or refer you to someone closer to your court.
What should I bring to my first meeting with William?
Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. William will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is William accepting new business clients right now?
William's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.
Areas served
Business attorneys serving Northbrook, Chicago and Springfield in Illinois
William handles business matters throughout Illinois. Each city below is a direct link into the search page for verified business attorneys in that community.
More counsel
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If William's intake is full or the fit isn't right, these business attorneys in Northbrook handle similar matters. Every profile below is verified and open to consultations.





