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Mark was not only knowledgeable and prepared on every aspect of the buying process, but he was a master negotiator on getting me the deal that I wanted. As a bonus, he used his designer skills to show me the potential that the property held that was overlooked by others; after closing, he helped with the design process and he was right on target with all of his ideas. In the end, the finished home was exactly what I had hoped it to be. I found Mark an experienced and talented professional.

Michael Klein

I have dealt with Mark Shannon when I put up my Upper East Side apartment for sale. He proved to be the most professional agent I could have hoped for. He paid attention to every detail, produced the best brochure and made sure that the apartment was in super shape when he was showing it to potential buyers. Not only did he succeed in selling the apartment but also was he incredibly helpful in being by my side during the very difficult moving process. Sorting out 35 years of my life and making the apartment spotless for the final inspection. He did more than I ever expected and I could not recommend using anybody more than Mark if I had another property to sell or was asked for advice.

Thierry Millerand
East 78th Street NY. NY

We worked with Mark Shannon as our realtor from March 2012 to May 2013. We appreciate his professionalism, attention to details as well as accessibility. In our search for a new home in the city, Mark knew the right questions to ask. Mark always gave us ample time and space to decide on each property, and we never felt pressured or unassisted in making a decision. Mark has an extensive network in the city. We also found our attorney, mortgage broker and contractor with his help. All of which provided excellent service. We are thankful to have had Mark as our realtor, and would recommend his service to our friends and family.

Cindy and Jason

Mark Shannon is a true Real Estate professional and we definitely can recommend him in every way. We feel very fortunate to have had the opportunity to work with him.

Thanks to Mark's high energy and hard work, we have recently been able to close two multi- million $ deals in Manhattan. Everybody knows that Real Estate deals can take a very long time and become more complicated than we would like them to be. Our deals were indeed difficult, but instead of being discouraged, Mark was very pleasant, cool and always target oriented. He patiently guided us through every stage, from the initial presentation to negotiation and finally closing.

Integrity is Mark's strength and he really focuses at the interest of his clients. Instead of swiftly pushing through just any offer, Mark actually helped us to walk away from some deals that in the end would have been problematic. We were well assisted, both as sellers and buyers and it is not an exaggeration to say that Mark saved us millions through his diligent work.

Eileen and Bo Lindstrand

As Board President of my Village Co-op I was impressed by not only Mark’s complete knowledge of the building’s history and character, but also how smoothly he has guided shareholders in the process of selling a unit and helping potential shareholders purchase a unit. His professionalism is exemplary. BHG

Mark staged our apartment and sold it at one open house. Dr. L.J.

Robyn D.
“Carolyn and Paul are a rare find in Manhattan real estate.”
People ask me all the time how we managed to sell our apartment in such a short time in such a terrible economy for such a great price.  My answer is simple, amazing brokers.  Carolyn and Paul are a rare find in Manhattan real estate.  After you meet with them you may be asking yourself (as I did) “Is this couple too good to be true?”  You are getting the best of both worlds with the Zwebens: Paul’s encyclopedic knowledge of New York real estate and Carolyn’s savvy marketing (flowers, champagne, and music at every open house).  Did I mention they are honest, trustworthy and nice?  If you want to work with a broker that keeps you up at night worrying, undersells your property, never answers your calls and makes you wonder if he/she has forgotten about your apartment entirely, then don’t work with Carolyn and Paul.  However, I suspect you will choose otherwise and you will be happier and richer for it.

Lilly F.
“You will most certainly run out of words to express your gratitude and praise for the Zwebens”
I have not experienced nor have I heard about anybody better than Carolyn and Paul Zweben.  They are superlative in each and every aspect of the process.  From the first minute you sit down with them to discuss apartments to the second you sign your last document at the closing, you will find nothing to criticize and will most certainly run out of words to express your gratitude and praise for them. 

David S.
“If you don’t use Paul and Carolyn Zweben you aren’t going to get the best deal you can.”
The most important part of any business relationship is trust, and Paul and Carolyn have earned and kept mine through the sale of my condo and the purchase of my girlfriend’s co-op.  If you don’t use Paul and Carolyn Zweben you aren’t going to get the best deal you can. And, you’ll miss you out on dealing with two of the most honest, upstanding, loyal and caring business folks I have ever met in my life.

Ian D.
“It is not an overstatement to say that Paul and Carolyn were indispensable to us.”
As first-time homebuyers, Carolyn and Paul educated us on the Manhattan real estate market and helped to ensure that we got the most for our money.  They provided advice and support from the moment we decided to place a bid through closing.  And they were always two steps ahead of the game.  It is not an overstatement to say that Paul and Carolyn were indispensable to us.  Carolyn and Paul are outstanding.  I would not hesitate for a moment to work with them again, on either side of a transaction.



At Douglas Elliman Real Estate

1995 Broadway

New York, NY 10023

Office: 212.769.6537




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