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Harper J. Dimmerman

Litigation Attorney at Philadelphia, PA

5.0   184 reviews

About Harper

Learn Harper’s areas of practice.

Practice areas
  1. Litigation
    Mr. Dimmerman is a seasoned trial attorney, having handled a plethora of litigation matters, over the course of roughly the past two decades. Lawsuits have ranged from the simplest and most straightforward of disputes to complex litigation.

    18 years

  2. Real estate
    Attorney Dimmerman has been a leading Pennsylvania real estate lawyer for quite some time, with extensive experience educating other attorneys and students. He handles commercial and residential transactions and litigation.

    18 years

  3. Family
    Attorney Dimmerman has successfully handled various family law matters, such as divorce, custody, support, and Protection from Abuse.

Harper J. Dimmerman, Attorney at Law, holds the highest peer review rating with Martindale-Hubbell (AV Preeminent since 2009) and has been named a Pennsylvania Super Lawyer Rising Star on multiple occasions, amongst other honors. He is a lecturer to other attorneys, former professor in Temple University's Fox School of Business, proven entrepreneur, the author of dozens of published legal articles with a prominent ALM news source, bestselling novelist, and highly accomplished attorney.

His lectures to other attorneys have related to real estate law, title insurance and landlord-tenant subjects; he has received praise from his contemporaries, those fulfilling their educational requirements and furthering their own understanding of these complex topics. In his capacity as an adjunct professor at Temple University for a roughly decade, he taught hundreds of undergraduate business students various areas of the law, with a special emphasis on myriad real estate law subjects. In fact, his courses were a prerequisite for aspiring REALTORS, as he possesses an intense mastery over contract law and the regulations governing real estate brokerage in the Commonwealth of Pennsylvania. In 2016, he was awarded "Best Adjunct Professor of the Year for Legal Studies," an incredible honor. His time at Temple University was arguably his most rewarding endeavor to date.

Attorney Dimmerman was elected to a Mediator (ADR) post with the Greater Philadelphia Association of Realtors, due to his prominence as a real estate attorney. Over the course of fifteen years, he made significant contributions to “The Legal Intelligencer,” Pennsylvania's primary, daily resource for other attorneys in search of cutting-edge legal developments. Mr. Dimmerman has also been licensed as a REALTOR with Berkshire Hathaway on two separate occasions, where he acquired practical insight into the profession, giving him yet another edge in real estate negotiations, contract drafting and real estate litigation.

He attended Vassar College and achieved a B.A. in English Literature, and graduated cum laude from the University of Miami School of Law, where he was an Editor of the Business Law Review and won a coveted Legal Research and Writing prize. While attending law school, he interned for a notable entertainment executive and secured a coveted summer internship with a Federal Judge for the Southern District of Florida. He also served as a law clerk to a prominent Miami-based law firm while completing his Juris Doctor. Mr. Dimmerman attended The Wharton School (undergraduate, evening division) and Sophia University in Tokyo Japan, where he taught English, studied the Japanese language and business subjects. Most recently, in early 2022, he successfully completed an innovative blockchain program with MIT.

Attorney Dimmerman, along with hand-selected former associates at various intervals, has successfully represented hundreds of clients since 2004. Over the course of nearly two decades, his law firm has achieved extraordinary results for a diverse array of cooperative and sophisticated individuals and corporate entities. Top-notch attorneys have sought out his services as well, both for their own civil needs and those of their friends and loved ones. Dimmerman PC's consulting arm also assists with individuals and corporations, with value-added, bespoke solutions to difficult legal questions. Mr. Dimmerman is well-respected for his singular and highly thoughtful legal strategies and cost-benefit analyses.

Photos and videos

Licensed for 20 years
State PA
Status Active
Acquired 2002
Updated 10/01/2022
State NJ
Status Resigned Without Prejudice
Acquired 2003
Updated 11/05/2022

We have not found any instances of professional misconduct for this lawyer.

Contact Harper

Dimmerman PC
1835 Market Street
Suite 2626
Philadelphia, PA, 19103


5.0 / 5.0
  184 customer reviews
Posted by anonymous | February 27, 2019
This review is from a person who hired this attorney.
| Hired Attorney
A true justicee hunter
I was stupid enough to sign a real estate contract to buy a new construction new construction. Builder attitude changed after deposit was paid. Even with the contract against me, Harper helped me talk the builder into making changes to the contract to address my concerns. I learned my lessons the hard way, which was unnecessarily time consuming and stressful. I will wholeheartedly recommend Harper to family and friends looking into any real estate transactions.
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Posted by Michael L | February 1, 2019
This review is from a person who hired this attorney.
| Hired Attorney
Harper Dimmerman is a class act start to finish.I agreed to an initial quote.The next day I received an email. upon research of my case, less than half the funds were needed . A very honest man. Mr.Dimmerman takes his responsibilities very seriously.He works very hard in a timely fashion. He tells you like it is, may not be what you want to hear but he is very pragmatic man.I was between a rock & a hard place & he helped me.I Highly recommend this man!!Thank You Mr.Dimmerman Michale
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Posted by Jorge A | January 15, 2019
This review is from a person who hired this attorney.
| Hired Attorney
One of the best lawyer I have encountered
I have had the privilege of hiring Mr Dimmerman as an attorney on a very complicated Real Estate litigation Not only I found a very honest and fair individual, I found a dedicated knowledgeable lawyer who always kept my best interest and unique needs at the forefront. I highly recommend Harper to anyone seeking a real professional legal representation
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Posted by Myimyi | January 1, 2019
This review is from a person who hired this attorney.
| Hired Attorney
The best Attorney on the East Coast
Thank you so much Mr. Dimmerman for everything you did for me. This attorney is just amazing. Not only did he get back to personally each and every time he was able to settle my case quickly and get my assignment fee owed to me. Thanks again
Posted by Jim Dattilo | December 13, 2018
This review is from a person who hired this attorney.
| Hired Attorney
Responsive, professional, and expert.
Mr. Dimmerman provided guidance on a matter with my condominium. Throughout the time he counseled me, he was responsive and highly professional. It is clear he understands all aspects of real estate law. With that matter behind me, I will be using him in the near future to help with developing contracts for my business.
Posted by Tor-montsho Green | January 2, 2017
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
Mr. Dimmerman was very helpful in directing me in the right direction. His quick response showed me his passion and compassion he has for others. Thank You
Posted by Umut | July 16, 2015
He is the best
I called him in a short notice about a leasing problem that I have and he responded right away. He gives you all the options and walk you through each step. He called the management office for me even though he did not officially represented me and made a deal for me. I highly recommend him for anyone looking for an attorney. He simply is the best
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Posted by Paul | March 28, 2015
Helpful and Honest
Harper helped me realize there was an easier way to deal with my issue and explained what steps I should take going forward. His advice will certainly save me time, money, and aggravation. Very knowledgeable and up front about what to expect. I would highly recommend this professional .
Posted by Frank | March 16, 2015
A lawyer with fierce passion for the law and high compassion for those he defends!
After my first consultation I knew I wanted Harper Dimmerman to represent me. My case was very serious and involved the coordination of several attorneys. Mr. Dimmerman made me feel confident that he could coordinate everyone (which he did) as well as trying to lessen my load by explaining everything to me at my pace. I was impressed with his compassion in my case and also his passion for the law. I would not hesitate to recommend Mr. Dimmerman to my friends and family. It is not every attorney who is so responsive to his client’s needs and in such an expedient fashion. I am in his debt.
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Posted by anonymous | March 6, 2015
Helpful Consultation
I called Mr. Dimmerman about an issue I am having with my neighbors to repair a shared structure. After explaining the situation, he ran down a number of options and why they would or would not have been a good idea. This included him not being hired as a lawyers. In addition he gave some advice to think about that regarded things outside of legal process including how my neighbors may react to a lawsuit and what a relationship may look like with them in the future.
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Posted by Lynda Steiner | February 19, 2015
Immediate response with good information
I sent Harper a message about my problem and within 2 minutes my phone rang! Although he does not practice in my area, and could not represent me, he gave me some very valuable information and was very helpful! I traditionally don't have such good luck with attorneys, so what a refreshing and surprising experience! Thank you so much!
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Posted by Mohammad | December 19, 2014
Extremely satisfied with the patience, advice and sincerity
I called Harper for my issue with lawsuits which is expected to come. Harper listened to it patiently and without any intention to be hired, he advised me and directed me to right location and right place to start my process. I liked the fact that he wasn't avoiding me even knowing that the I am not living in the same area, rather he advised me thoroughly and directed me to the right place. I highly recommend to work with him.
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Posted by Chris | December 19, 2014
HR Officer
Harper was responsive to my emails and phone calls. He arranged an appointment the same week of initial contact. Harper provided us with guidance for us to make a sound decision. We appreciated the consultation as it showed us the path to remediate our issues. I was very pleased with our first contact and learned some information I would not have found on my own.
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Posted by David | November 16, 2014
A+ Attorney - Highly Reccomended
Working with Harper has been such a pleasure. He is very professional, but at the same time, gets connected with you on a comfortable, personal level. He listens, is extremely reasonable, and understandable. His research is exceptional. He kept me posted on all information he collected in a wonderful timely manner. His quick response time was something I have never experienced before. He was very prompt and kept me in the loop at all times. He was extremely knowledgeable with law and court procedure/operations. You can tell he takes much pride in his work. He is confident and intelligent in his field. I would highly recommend Mr. Harper Dimmerman.
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Posted by Chris | July 30, 2014
Harper is Responsive and Reliable
Harper is always eager to help and very knowledgeable. Any time I've needed to contact Harper for his expertise on a real estate issue he has been very responsive, practical and easy to understand. Harper lays out the facts and makes sure I know what all my options are. He is forthright and honest and truly wants to see that his clients get the best service. Thanks Harper!
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Posted by William | July 30, 2014
Very responsive and helpful!
I've worked with many attorneys, and Harper was very responsive, able to address my issue (a landlord-tenant problem) and went above and beyond to follow up and check whether there were alternatives to the ones he presented. I would recommend him without hesitation.
Posted by Carlo | July 26, 2014
Superior service and delivers results
I have used Harper Dimmerman, Esq. for a business partnership agreement and our family has used Mr. Dimmerman's services for a complex real estate matter involving separation of title on an out-of-state vacation property, as well as in a challenge to a residential property valuation involving several city agencies. In all three instances, we have found Mr. Dimmerman to be a strong, determined and effective attorney who delivered the exact results we needed. He is unique among attorneys in smaller practices we have seen, in that he provides individualized attention and service, and takes the time to understand each matter fully in order to recommend the best strategy for success. He is extremely organized and very accessible by telephone and email. I was also impressed that he has chaired bar association committees and is a frequent speaker on new developments in the law. We were extremely pleased with our outcomes and would not hesitate to recommend him for any legal need.
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Posted by Stacey | July 20, 2014
Harper Dimmerman, excellent attorney
Harper Dimmerman is an excellent attorney and I highly recommend hiring him to anyone that is in need of representation for any real estate legal matter. My family had a problem with a deed in trust that was initiated many years ago. Mr. Dimmerman reviewed the deed and clearly explained all of the possible options, in layman’s terms, to correct the problem. Additionally, he quickly responded to our issue and made us feel like we were his most important clients. Due to his thorough and knowledgeable representation, we were able to make a decision that best suited our needs. If you have a real estate issue and you want an attorney that is experienced, unpretentious, and will provide you with the best representation, you should retain the services of Harper Dimmerman. My family was more than satisfied with our experience.
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Posted by Debra | June 20, 2014
Today I sought the advice of Mr. Harper Dimmerman regarding a mortgage matter. Mr. Dimmerman was very professional and well versed in the intricate points which this subject encompasses. Mr. Dimmerman listened patiently and responded with a kind firmness. The advice that Mr. Dimmerman rendered during this conversation will be forever invaluable.
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Posted by Steve | May 22, 2014
very pleased, would recommend
I hired Mr. Dimmerman for a commercial real estate matter. He was very responsive from beginning to end --- if there were 10 stars available on the 5-star scale here, I would put a 10. The process was handled very efficiently. He clearly understood my priorities and took care of things with that in mind. As a self-employed single-member business owner, I am definitely a "small fry" in the scope of things, but he dealt with me with great professionalism and diligence.
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  • Retainer Sometimes
Payment methods
Cash, Check, Credit Card


AVVO RATING 9.3 (Superb)

Work Experience

  • Principal
  • Dimmerman PC
  • 2004 - Present
  • Adjunct Professor
  • Temple University
  • 2009 - 2021


  • University of Miami School of Law
  • JD - Juris Doctor, cum laude
  • 1999
  • Vassar College
  • BA - Bachelor of Arts
  • 1994

Legal Cases

  • Details on Request


  • Philadelphia Bar Association
  • Co-Chair of the Solo and Small Firm Committee
  • 2004 - 2009

Languages Spoken

  • English


  • Best Adjunct Professor of the Year for Legal Studies
  • Temple University
  • 2016


Speaking Engagements

  • Title Law Boot Camp
  • Ethics
  • 2019

Attorney endorsements

Received (7)
Given (13)
Real estate Attorney | Feb 04
Relationship: Worked together on matter
"Excellent, informative, highly recommended."
Lawsuits and disputes Attorney | Jul 23
Relationship: Worked together on matter
"Harper is a professional, dedicated, and hard working counselor. I highly recommend him."
Lawsuits and disputes Attorney | Jul 18
Relationship: Worked together on matter
"I endorse this lawyer. Mr. Dimmerman excels at all qualities one looks for in an attorney. He was thorough, highly competent, and his communications regarding the case were very prompt. This is in addition to the fact that he achieved all we could ask from from the case. I would recommend him wholeheartedly."
Lawsuits and disputes Attorney | Apr 12
Relationship: Fellow lawyer in community
"I endorse this lawyer. I am an attorney in Atlanta, Georgia and Harper helped me with a legal matter. I cannot stress how helpful he was. A credit to the profession."
Real estate Attorney | Apr 04
Relationship: Fellow lawyer in community
"I endorse this lawyer."
Real estate Attorney | Apr 13
Relationship: Fellow lawyer in community
"I endorse this lawyer because not only does Harper Dimmerman possess superior legal skills, but he makes sure that his clients are at ease with their situation. Harper represents his clients with energy and enthusiasm. He truly cares about providing his clients with a positive experience throughout their legal matter."
Real estate Attorney | Dec 19
Relationship: Fellow lawyer in community
"Excellent lawyer."
View more endorsements
Criminal defense
Civil rights
Commercial real estate
Bankruptcy and debt
Intellectual property
Workers compensation
Personal injury
Estate planning