Dean Shaun Mastrangelo, Business Attorney in Syosset, New York
Over 27 years of legal practice · focused on Business, Family Law, and Formation
MemberatLaw Office of Dean Shaun Mastrangelo
Syosset, NY
Practicing business in Syosset since 1999.
- 27+
- Years practicing
- 2
- Bar admissions
Are you Dean Shaun Mastrangelo?
This profile was built from public bar records and is still unclaimed. Claim it free to control your photo, bio, and fees — and get client inquiries sent straight to you.
Quick answer
Dean Shaun Mastrangelo is a member based in Syosset, NY. The practice focuses on Business, Family Law, and Formation. Dean has over 27 years of legal experience. Currently practicing at Law Office of Dean Shaun Mastrangelo.
- Based in
- Syosset, NY
- Experience
- over 27 years
- Known for
- Business · Family Law · Formation
- Handles Business, Family Law, and Formation matters from Syosset, NY.
- Over 27 years of practice as a licensed attorney.
About Dean Shaun Mastrangelo: Dean Shaun Mastrangelo is a member based in Syosset, NY. The practice focuses on Business, Family Law, and Formation. Dean has over 27 years of legal experience. Currently practicing at Law Office of Dean Shaun Mastrangelo.
Areas of practice
Dean's practice areas in Syosset
Dean concentrates on business, family law, formation, general, and real estate. Each area below outlines the kind of case Dean handles, typical outcomes to expect, and how the intake process starts.
Business
View other Business attorneys
Family Law
View other Family Law attorneys
Formation
View other Formation attorneys
General
View other General attorneys
Real Estate
View other Real Estate attorneys
Traffic
View other Traffic attorneys
Business cases in Syosset, New York
Dean takes business matters in Syosset, New York. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Dean agrees to represent you.
Family Law cases in Syosset, New York
Dean takes family law matters in Syosset, New York. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Dean agrees to represent you.
Formation cases in Syosset, New York
Dean takes formation matters in Syosset, New York. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Dean agrees to represent you.
General cases in Syosset, New York
Dean takes general matters in Syosset, New York. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Dean agrees to represent you.
Real Estate cases in Syosset, New York
Dean takes real estate matters in Syosset, New York. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Dean agrees to represent you.
Biography
Dean Shaun Mastrangelo, business attorney serving Syosset
Dean Shaun Mastrangelo is a member based in Syosset, NY. The practice focuses on Business, Family Law, and Formation. Dean has over 27 years of legal experience. Currently practicing at Law Office of Dean Shaun Mastrangelo. Dean works from Syosset, New York and takes on business matters across the region.
Dean Shaun Mastrangelo is a lawyer practicing family, real estate, residential and 3 other areas of law. Dean received a B.A. degree from Marist College in 1992, and has been licensed for 27 years. Dean practices at Law Office of Dean Shaun Mastrangelo in Syosset, NY.
Working with Dean on a business matter
Dean Shaun Mastrangelo is a lawyer practicing family, real estate, residential and 3 other areas of law. Dean received a B.A. degree from Marist College in 1992, and has been licensed for 27 years. Dean practices at Law Office of Dean Shaun Mastrangelo in Syosset, NY.
Who Dean represents
Dean reviews new inquiries case-by-case for business, family law, and formation matters in Syosset and the surrounding New York area.
Credentials
Credentials — where Dean studied and practices
Roger Williams University
J.D. · 1998
Marist College
B.A. · 1992
Jurisdictions
Dean's state bar admissions
New York
1999 · ACTIVE
Eastern and Southern
1999 · ACTIVE
Dean studied at J.D. in Roger Williams University and B.A. in Marist College.
Law school and academic background
Dean completed J.D. in Roger Williams University and B.A. in Marist College. Formal legal training is one signal of substantive knowledge — the day-to-day practice Dean runs in New York is where that training gets applied to real client questions.
Locations
Dean Shaun Mastrangelo's office in Syosset
Dean's primary office is at 575 Underhill Blvd., Ste. 203, Syosset, NY, 11791. In-person meetings are by appointment; a phone intake usually comes first.
Law Office of Dean Shaun Mastrangelo
575 Underhill Blvd., Ste. 203
Syosset, NY 11791
Open in Google MapsClient feedback
Client reviews of Dean Shaun Mastrangelo
Dean has not yet collected verified client reviews on LawyersListed. Reviews here are all from confirmed clients; anonymous ratings are moderated out.
No reviews yet
Only verified clients who have consulted with Dean Shaun Mastrangelo can leave a review.
Schedule your consultationHiring guide
How to hire Dean Shaun Mastrangelo — what to expect in your first consultation
Working with a new business attorney should feel structured. Here's how the first two conversations with Dean usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Dean charges for the initial consult. That fee is credited toward representation if you retain Dean'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; Dean will tell you what matters and what doesn't.
Questions to ask a business attorney in Syosset, New York
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 Dean
Dean 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. Dean confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Dean'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 Dean Shaun Mastrangelo
How much does it cost to hire Dean for a business case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Dean walks through the likely range during the consult so there are no surprises.
Does Dean offer a free consultation?
Dean charges for the initial consult; that fee is credited toward representation if you retain Dean's office. Some business attorneys offer free consults — check Dean's current terms during booking.
How long do business cases in New York 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. Dean gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Dean take my case if I'm outside Syosset?
Dean is licensed in New York. Matters governed by New York law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Dean 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 Dean?
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. Dean will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Dean accepting new business clients right now?
Dean'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 Syosset and Albany in New York
Dean handles business matters throughout New York. Each city below is a direct link into the search page for verified business attorneys in that community.
More counsel
Other top-rated business attorneys in New York
If Dean's intake is full or the fit isn't right, these business attorneys in Syosset handle similar matters. Every profile below is verified and open to consultations.