John Mammano
Mobile: 571-331-8557


About John

John believes that as an advocate of his clients and as a caring member of the community, it is his responsibility to provide the highest standard of service, market expertise, and professionalism. John is fully committed to assisting buyers and sellers in achieving their personal real estate goals.

John is a top performing real estate agent who successfully works with his clients to help them achieve their personal real estate goals.  Whether working with first time buyers and sellers or seasoned luxury clients, John stands by his real estate mantra for all clients “Excellent Representation. My Duty – Your Right” For him, this is a pledge to provide the highest level of service and guidance while turning the challenges of purchasing or selling real estate into a hassle free experience. 

My Story: I acquired my dedication of hard work and entrepreneurial spirit from my parents.  Growing up I was involved in my family’s construction and real estate investment businesses and learned from an early age that hard work, smart business decisions and loving your job are the ingredients for success. Today, these are the foundation of my own business. I vividly remember my first real estate purchase and what an exciting experience it was!  Since the days of enjoying my first home I have purchased several properties including investments and those needing renovation. Renovation projects are just one of my many side interests I enjoy while finding the highest potential in properties.  

My Business:  My business is primarily from  referrals and repeat clients. Living in Washington for over 17 years, I have an outstanding track record with the clients I’ve represented over the years. My reputation is known for market knowledge, attention to detail and stellar negotiating skills.  With my many years of experience, I understand the importance of exceptional customer satisfaction and going the extra mile. I pride myself on being an attentive listener too.  

I hold a Bachelor of Arts degree in Political Science and a minor in Business Administration from Arizona State University. With my strong background from corporate industry, I bring to the table many years of experience in Finance and Project Management which have honed my ability to smoothly handle complex transactions. 

On a Personal Note:  I have an eclectic array of interests spanning from equestrian events, architecture, reading, renovating homes, design to international travel.  Among my favorite travel hot spots are Prague, Buenos Aires and Budapest Hungary. Awesome history, architecture and of course the food!  I am also a big animal lover and contribute monthly to The Humane Society. 

My City Favorites:

  • Coffee House: Tryst in Adams Morgan.
  • Building: The atrium of the National Building Museum.
  • Spot: Jogging on the Mall early in the morning.

 Professional Affiliations:

  • National Associations of Realtors (NAR)
  • Great Capital Area Association of Realtors (GCAAR)
  • National Associations of Realtors (NAR) GREEN Designation.
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