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About me

I have been practicing for 35 years. The first ten in boutique estate and tax planning firm in Manhattan where I eventually became a partner. The birth of my son gave me cause to reflect on what was important to me. My father, a NY City detective, was seldom home due to his unusual working hours. I knew that I wanted to spend time with my son so I decided to establish a practice in Farmingdale where I have been in the same office for twenty five years.

I pride myself on my responsiveness and hands on approach. All calls are promptly returned and even though I have a staff of four excellent paralegals, my clients have my cell phone number as well.

I have extensive knowledge of all aspects of real estate, including purchases and sales, co-ops and condominiums and 1031 exchanges. I also am very well versed in estate planning and administration. Our fees are reasonable and there is never a charge for a consultation.


Languages spoken: French, German

Practice areas


  1. Real Estate: 80%
    35 years, 10 thousand cases
  2. General Practice: 10%
    35 years, 2.5 thousand cases
  3. Estate Planning: 10%
    35 years, 2.5 thousand cases



Free consultation (30 minutes)

Payment types:

Cash, Check

Attorney endorsements

2 total 

Are you an attorney? Endorse this lawyer

  • Jay Warren Dankner

    I endorse this lawyer. He is disciplined, dedicated and knowledgeable. Always available and responsive to his client's needs.


    Jay Dankner Personal injury Attorney
    Relationship: Worked together on matter

  • Michael A. Kinzer

    I have known John for years. He is the 'go to' attorney regarding all real estate and mortgage lending matters, especially 'short sales'.


    Michael Kinzer Foreclosure Attorney
    Relationship: Fellow lawyer in community

Contact info

100 Broadhollow Rd
Farmingdale, NY, 11735-4813


NYDue to reregister within 30 days of birthday 198103/07/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Work experience
TitleCompany nameDuration
OwnerLaw Offices of John P. Rosenblatt1988 - Present
PartnerJoseph and Koppel1981 - 1988
Association namePosition nameDuration
Crime Stoppers of Suffolk CountyDirector and General Counsel2010 - Present
Suffolk County Council Boy Scouts of AmericaDirector2006 - Present
American Bar AssociationMember1999 - Present
Suffolk County Bar AssociationMember1988 - Present
School nameMajorDegreeGraduated
Fordham University School of LawLawJD - Juris Doctor1980
Vassar CollegePsychologyA.B.1977
Speaking engagements
Conference nameTitleDate
Continuing Legal Education ProgramThe Short Sale2008
Legal Education SeminarSuccessfully starting your own law practice1990