
David Nathan Mallenbaum, Business Attorney in Philadelphia, Pennsylvania
Over 42 years of legal practice · focused on Business and Real Estate
ShareholderatLedgewood, a Professional Corporation
Philadelphia, PA
Practicing business in Philadelphia since 1984.
- 42+
- Years practicing
- 2
- Bar admissions
Practices in
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Quick answer
David Nathan Mallenbaum is a shareholder based in Philadelphia, PA. The practice focuses on Business and Real Estate. David has over 42 years of legal experience. Currently practicing at Ledgewood, a Professional Corporation.
- Based in
- Philadelphia, PA
- Experience
- over 42 years
- Known for
- Business · Real Estate
- Handles Business and Real Estate matters from Philadelphia, PA.
- Over 42 years of practice as a licensed attorney.
About David Nathan Mallenbaum: David Nathan Mallenbaum is a shareholder based in Philadelphia, PA. The practice focuses on Business and Real Estate. David has over 42 years of legal experience. Currently practicing at Ledgewood, a Professional Corporation.
Areas of practice
David's practice areas in Philadelphia
David concentrates on business and real estate. Each area below outlines the kind of case David handles, typical outcomes to expect, and how the intake process starts.
Business cases in Philadelphia, Pennsylvania
David takes business matters in Philadelphia, Pennsylvania. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before David agrees to represent you.
Real Estate cases in Philadelphia, Pennsylvania
David takes real estate matters in Philadelphia, Pennsylvania. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before David agrees to represent you.
Biography
David Nathan Mallenbaum, business attorney serving Philadelphia
David Nathan Mallenbaum is a shareholder based in Philadelphia, PA. The practice focuses on Business and Real Estate. David has over 42 years of legal experience. Currently practicing at Ledgewood, a Professional Corporation. David works from Philadelphia, Pennsylvania and takes on business matters across the region.
David Nathan Mallenbaum is a lawyer practicing commercial, commercial transactions, real estate finance and 2 other areas of law. David received a B.A. degree from Harvard University in 1979, and has been licensed for 42 years. David practices at Ledgewood, a Professional Corporation in Philadelphia, PA.
David's approach to business cases
David Nathan Mallenbaum is a lawyer practicing commercial, commercial transactions, real estate finance and 2 other areas of law. David received a B.A. degree from Harvard University in 1979, and has been licensed for 42 years. David practices at Ledgewood, a Professional Corporation in Philadelphia, PA.
The kind of cases David takes
David reviews new inquiries case-by-case for business and real estate matters in Philadelphia and the surrounding Pennsylvania area.
Credentials
Credentials — where David studied and practices
Columbia University School of Law
J.D. · 1983
Harvard University
B.A. · 1979
Jurisdictions
David's state bar admissions
Pennsylvania
2007 · ACTIVE
New York
1984 · ACTIVE
David studied at J.D. in Columbia University School of Law and B.A. in Harvard University.
Law school and academic background
David completed J.D. in Columbia University School of Law and B.A. in Harvard University. Formal legal training is one signal of substantive knowledge — the day-to-day practice David runs in Pennsylvania is where that training gets applied to real client questions.
Locations
David Nathan Mallenbaum's office in Philadelphia
David's primary office is at Two Commerce Square, 2001 Market Street, Suite 3400, Philadelphia, PA, 19103. In-person meetings are by appointment; a phone intake usually comes first.
Ledgewood, a Professional Corporation
Two Commerce Square, 2001 Market Street, Suite 3400
Philadelphia, PA 19103
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Schedule your consultationHiring guide
How to hire David Nathan Mallenbaum — what to expect in your first consultation
Working with a new business attorney should feel structured. Here's how the first two conversations with David usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
David charges for the initial consult. That fee is credited toward representation if you retain David'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; David will tell you what matters and what doesn't.
Questions to ask a business attorney in Philadelphia, Pennsylvania
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 David
David 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. David confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
David'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 David Nathan Mallenbaum
How much does it cost to hire David for a business case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. David walks through the likely range during the consult so there are no surprises.
Does David offer a free consultation?
David charges for the initial consult; that fee is credited toward representation if you retain David's office. Some business attorneys offer free consults — check David's current terms during booking.
How long do business cases in Pennsylvania 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. David gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can David take my case if I'm outside Philadelphia?
David is licensed in Pennsylvania. Matters governed by Pennsylvania law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — David 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 David?
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. David will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is David accepting new business clients right now?
David'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 Philadelphia, Pittsburgh and Harrisburg in Pennsylvania
David handles business matters throughout Pennsylvania. Each city below is a direct link into the search page for verified business attorneys in that community.
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