Karen Kostiw's extensive background in real estate and finance allows her to uniquely understand her clients' needs and concerns in today's fast-paced market. As a former financial services executive with extensive team-building and negotiation experience, Karen has the proven ability to meet and exceed her client's goals. Karen utilizes a project management discipline to ensure all steps in the real estate transaction process move smoothly and stress free. Karen's extensive professional and personal network, which includes bankers, contractors, and design professionals, allows her to assemble the perfect team for each of her clients.

Karen enjoys building relationships through increased understanding, honesty and trust to foster inclusion in all aspects of the buying and selling process. She is an empathetic listener, responsive to her clients' inquiries and drives forward to achieve amicable solutions to real estate dilemmas.

Prior to residential real estate sales, Karen held a successful tenured position on Wall Street where she both analyzed residential mortgage debt offerings and managed client relationships.

Karen was raised on the North Fork of Long Island and has resided and worked in Manhattan since graduating college. Karen is currently living in the Chelsea neighborhood of Manhattan with her husband who is also in the real estate profession as a private lender and developer in the tri-state area. Karen currently volunteers at the NYU Career Services Center, is a New York Cares Kaplan SAT tutor, and a SIFMA Invest Write Essay Judge. She enjoys the arts, cooking, running, playing tennis in Central Park and exploring the neighborhoods and restaurants within the five boroughs.

Karen is a dual licensed salesperson in New York with Warburg and in New Jersey with Elite Realtors. She is a member of the Real Estate Board of New York (REBNY) with a board-certified designation of New York Residential Specialist (NYRS®), as well as a member of the National Association of Realtors and the Multiple Listing Service of Garden State, New Jersey and Hudson County. She is also a member of the Financial Executive Networking Group (FENG), Risk Management Association (RMA) and Society of Human Resource Managers (NY SHRM).

Visit my website: KarenKostiw.com


The New York Times
Karen Kostiw and her client featured in “The Hunt” https://www.nytimes.com/interactive/2020/09/24/realestate/24hunt-woodhouse.html?mtrref=undefined&assetType=REGIWALL  
Karen Kostiw comments. https://www.inman.com/2020/09/04/looking-for-a-better-deal-consider-the-condo/
The New York Times
Karen Kostiw and her client featured in “The Hunt” https://www.nytimes.com/interactive/2020/07/16/realestate/16hunt-hagstrom.html
Gill Chowdhury, Karen Kostiw, and Jeanne Byers comment. https://www.hunker.com/13727043/confusing-real-estate-terms-explained
Apartment Therapy
Karen Kostiw comments. https://www.apartmenttherapy.com/apartment-dishwashers-36712385
Brick Underground
Karen Kostiw comments. https://www.brickunderground.com/buy/buy-curious-what-new-yorkers-need-to-know-about-moving-to-weehawken
Apartment Therapy
Wendy Arriz and Karen Kostiw comment. https://www.apartmenttherapy.com/real-estate-agent-hiring-36646585
Karen Kostiw, Nicole Durosko, and Steven Gottlieb comment. Porthole Windows: They’re Not Just for Ships and Boats
Karen Kostiw comments. https://www.realtor.com/advice/buy/what-does-move-in-ready-mean/
Karen Kostiw and Nicole Durosko comment. Incorporating Dome Ceilings in Your Home’s Design
Real Estate Weekly
234 W21st St. #55 by Gannon Forrester and 225 E36th St. 8H by Karen Kostiw mentioned. DONE DEALS: Big deal on little house in Park Slope
Apartment Therapy
Broker Karen Kostiw comments. https://www.apartmenttherapy.com/landscaping-mistakes-36616688
Apartment Therapy
Karen Kostiw comments. https://www.apartmenttherapy.com/fixer-upper-real-estate-legacy-35819141
Karen Kostiw pens a column. https://www.inman.com/2019/05/10/how-to-explain-home-inspections-to-buyers/?utm_source=dailyheadlines&utm_medium=email&utm_campaign=localnewsletter&utm_content=733287_textlink_7_
Karen Kostiw comments. https://www.realtor.com/advice/buy/pros-and-cons-of-writing-a-personal-offer-letter/
Karen Kostiw comments. https://freshome.com/buying-fixer-upper-considerations/
Agents Gill Chowdhury, Karen Kostiw, and Wendy Arriz comment. https://www.brickunderground.com/buy/what-is-a-nyc-pied-a-terre-bricktionary?utm_source=Brick+Underground+Newsletter&utm_campaign=4022ac7ff4-EMAIL_CAMPAIGN_2019_03_07_08_00&utm_medium=email&utm_term=0_2fdec7634c-4022ac7ff4-85748141
Apartment Therapy
Julia Leigh Surgeon, contact of Allison Chiaramonte comments; Jennifer Weisberg, contact of Eric Mendelsohn comments; Kelly Rosen Lagrange, contact of Karen Kostiw comments. https://www.apartmenttherapy.com/open-concept-layout-mistakes-266464
Apartment Therapy
Karen Kostiw talks about how to learn about your landlord before moving in. https://www.apartmenttherapy.com/questions-to-ask-landlord-before-moving-in-264592
House Method
Alex Lavrenov and Karen Kostiw talk about things to know when paying off your mortgage early. https://housemethod.com/real-estate/paying-off-mortgage-early/
New York Times
Karen Kostiw featured. https://www.nytimes.com/2018/11/08/realestate/the-beauty-of-a-no-nothing-walk-up.html
The New York Times
Karen Kostiw helps a young, newly married couple find their perfect apartment in Yorkville. https://www.nytimes.com/2018/11/08/realestate/the-beauty-of-a-no-nothing-walk-up.html
Karen Kostiw writes a column about how to stay connected with your clients. https://www.inman.com/2018/10/10/share-a-fall-home-maintenance-checklist-for-homeowners/
Apartment Therapy
Karen Kostiw talks about plants and which landscapes make a home feel like a home. https://www.apartmenttherapy.com/front-yard-plant-tips-landscapers-263338
The Real Deal
Karen Kostiw is featured. https://www.karenkostiw.com/wp-content/uploads/2018/10/10.1.2018-TRD-Charlton-Avenue-.pdf
Wall Street Journal
The photo of Karen Kostiw’s listing in Oradell, NJ and its “For Sale” sign outside was used in a story about national home continuing to increase. http://www.wsj.com/articles/home-prices-continued-to-climb-in-march-1432645221
Mann Report Newswire
Warburg Realty®, one of Manhattan’s leading residential real estate companies, is looking to open its first Brooklyn office in 2014, announced Frederick Warburg Peters, president of Warburg Realty. The firm has also begun the redesign of… More
Press Release
Warburg Realty, one of Manhattan’s leading residential real estate companies, is looking to open its first Brooklyn office in 2014, announced Frederick Warburg Peters, president of Warburg Realty.  The firm has also begun the redesign of… More


Testimonial from Stella

Karen was way beyond a professional agent who helped me not only with going through all the progress of purchasing a house, but was also a friend to me. She could always arrange all the appointments perfectly to match my limited schedule and listened to my preferences and concerns and made recommendations based on that. She was also so experienced in negotiation, which is probably the most important step in purchasing or selling. She is definitely an awesome agent that you will be really happy to work with.

Testimonial from Russ

Karen was a very professional, diligent, and overall reliable agent when working through the process of buying my home. As it was a first home for me, there was definitely some hand-holding along the way (which was necessary). I gave her the specs as well as the area(s) I wanted to purchase my home, and she was readily available with recommendations/opinions. Not only was she able to provide apartment advice, she had a long list of preferred attorneys/architects/contractors/banks etc. for the closing process. Without her expertise, the process would have been quite a bit more stressful. I highly recommend her for any purchases within Manhattan as it was a very seamless process.

Testimonial from Eric

Karen was a great agent for a first time homebuyer in NYC. She helped me go through the process (including coop board approval) extremely quickly, I was in my lovely new apartment in no time. She is very helpful and willing to take a lot of work off my shoulders. She also helped negotiate the purchase price lower which I greatly appreciated.

Testimonial from Kim

Karen is the best! Being new to the buying process, Karen graciously walked me through each step from the beginning to the closing. I wanted to see as many co-ops as I could to get a better understanding of what I wanted with what was available on the market. Karen’s knowledge and experience in Manhattan realty really helped me filter my list. She also made viewing appointments fast and organized them in the most efficient way so I could maximize my time. She gave me great advice throughout the process and was available 24/7 with answers to any questions I had. She was always very informative, endlessly helpful and a joy to work with throughout this process. She has great recommendations for everything from lawyers to contractors and has great intel about interior design. If you want a broker who goes above and beyond to help you purchase the perfect apartment, I would highly recommend Karen.

Testimonial from Joan & Ed

Selling an apartment in the highly competitive NYC market is a challenge. Karen understood our requirements and became our 24/7 person. She guided us through the process of obtaining painting, and floor contractors as well as plumbers, window washers, etc. Karen was with us from the initial showing through the recent closing. If we were to purchase again in the city, Karen is our go-to-person. Highly recommend her.

Testimonial from Carl and Amy

Karen was very responsive and helpful throughout the home purchase process for my wife and I. She was readily available to chat when needed, took care of answering our questions (or pointing us in the right direction to another resource where applicable), and helped to keep our best interests in mind from beginning to end.

Testimonial from JB and Erica

Karen completely changed my opinion of brokers. She is incredibly professional, mentored us through the process, is formal in a pleasant but warm way, and I’m going to make all of my friends go to her. She was a project manager, negotiator, and a therapist for us every day. Midway through the process, someone casually mentioned that Karen rarely does transactions as “small” as ours – literally had no idea. I always felt like Karen’s highest priority. She immediately responded to all communication, dealt with my first time anxiety, had all of our paperwork done *early*, and never once slipped up. I never thought I would be able to own a beautiful 2 bed in the Upper East Side, and I’m frankly still surprised. There is no way we could have done this without Karen – would recommend her endlessly. I’ll certainly be calling her when it’s time to move into something larger.

Testimonial from Christa

Purchasing property in New York City is a tough endeavor, let alone for someone out of town. Having a real estate agent is just not enough to navigate the obstacles that seemingly arise at every corner. In today’s world you need an agent, advisor, mentor and all-around real estate guru to guide you through the process. Basically, that is Karen all wrapped-up in one. She is amazingly patient yet aggressive when needed, hands on, but not pushy, and goes above and beyond of what is expected of a traditional real estate agent. From locating the perfect apartment, to negotiating a great deal and recommending the perfect attorney, to taking care of the finishing details such as installation of custom closets and designer blinds, Karen made my arrival a seamless journey. So, if you are looking for a modern real estate agent, one that anticipates rather than reacts, then Karen should be your first call.

Testimonial from Juhanh

“Karen was absolutely the greatest. It was a difficult time for my family and I, dealing with the passing of my sister. The process of handling her estate was not an easy task especially with traveling back and forth from Atlanta to New York. We needed someone patient and understanding, someone we could trust and that’s exactly what we got from Karen. Karen was always professional and stayed diligent in her business. As we were getting the property ready, Karen was there through the entire process, from beginning to end. She was focused and aimed at getting the best price possible. After the property was listed, it wasn’t very long before we had a buyer. I have to say that we believe Karen was an angel sent from God. The process was stressful at times, but Karen kept things in perceptive for us. Always on top of things and keeping us well informed. My family and I couldn’t have done it without Karen and we can’t thank her enough, she is highly recommended. Helen, Joi & The Pitts Family”

Testimonial from Edgar and Carmen Romero

In October of 2014, my father was diagnosed with a severe medical condition. He passed away in May 2015. I started looking for options for my mother to deal with her real estate holdings, holdings that she and my father had built up over many years through hard work and perseverance. The true American Dream for Cuban immigrants who came to this country with NOTHING. In the search for someone to help, the only person that stepped up and took a chance with the older widow and her son was Karen. She was patient, supportive, knowledgeable and compassionate at one of the worst and sensitive times of our lives. To that end, she found the perfect fit for us, and worked (and continues to do so) on every aspect of our deal through its eventual closing and rental. She was a Godsend to us. We don’t know what we would have done without her during that difficult time. She is not our realtor. She is a trusted friend. You could not go wrong with Karen on your side.

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