At a glance
Yonkers, Bronxville, Scarsdale, Eastchester, Tuckahoe, Somers
Working with Buyers and Sellers, Working with Rental Clients, Staging, Working with investors
MK has spent her entire professional career in real estate. Having experience ranging from valuation and portfolio analysis to advising on major commercial acquisitions and dispositions, MK realizes that every buyer and seller has unique needs. Her goal is to understand those needs and partner with her clients to make their experience seamless and satisfying.
As the Vice President of Marketing for ING Realty Partners and a Manager at PricewaterhouseCoopers, MK has developed an expertise in sales, client relations, valuation, and negotiations. A Certified Public Accountant with strong attention to detail, MK brings a unique business perspective to real estate transactions.
A 20+ year resident of Westchester, MK recently moved back from Manhattan in August of 2013. She has become an active member of the community. She serves as the board chair of the Bereavement Center of Westchester and continues to serve as a committee member for the Central Park... More
Professional Awards & Achievements
2016 Top Producer Gold Award
2017 Top Producer Platinum Award
2018 Top Producer Gold Award
2019 Top Producer Platinum Award
2020 Top 2 Agent in HL Bronxville, Top 1% of Westchester County Agents, Top 20 Agent of HL Westchester, Westchester Magazine All Star Agent, Top Producer Platinum Award
2021 #1 HL Agent in Bronxville Village, Top 1% of Westchester County Agents, Top 20 Agent of HL Westchester, Westchester Magazine All Star
Professional Associations & Designations
Member of National Association of Realtors, New York State Association of Realtors, Hudson Gateway Association of Realtors, Hudson Gateway Multiple Listing Service.
ABR ® Accredited Buyer Representative
SRES ® Senior Real Estate Specialist
Certified Public Accountant
Chair of Tree House Bereavement Center of Westchester
Board Member of LCHS
Committee member for Bronxville New Family Committee - Bronxville School
Committee member for Central Park Conservancy
Co-Chair Community Fund 3 on 3 Basket Ball Tournament
Co-Chair of Playground Partners Annual Fundraiser
Co-Chair St. Davids' School Annual Benefit
Co-Chair the Brownstone Preschool Annual Benefit
Houlihan Lawrence App for Smart Phones and Tablets
Above & Beyoned
MK is professional, detail oriented and one of the hardest working realtors you will ever meet. She goes above and beyond to research your needs as a buyer and a seller and leverage her deep knowledge of Westchester real estate. She welcomed us to the community and made sure that our family (kids and pets) had a smooth transition. Throughout our time in Bronxville, MK was always a resource for us for any needs and is one of the reasons we miss Bronxville so much (moved out of state for work). We were so impressed with her business acumen and knowledge of the area that we used MK to both buy and sell our home. We have and will continue to refer people to MK without hesitation knowing that they will be in truly capable hands.
- October 4, 2021
MK did a terrific job staging and recommending renovations before bringing my house to market. She patiently worked through all the details with me, and had a great personal touch making each room of the house shine to its fullest. I’d been trying to sell for years with no real action, but MK got me my asking price the first week it was on. She’s absolutely stellar!
- March 31, 2022
Leader of the Pack in Bronxville
Easily one of the top, if not the top, agent in Westchester and leader of the pack in Bronxville. MK is incredibly astute, driven, and exceptionally well-versed in all matters relating to buying and selling homes (outclassing the competition in this regard). We experienced her acumen on simultaneous sale/buy of existing/new homes, and we simply would not have garnered best price on both transactions. We also required tax advice on very complicated matters - she was able to address our questions, but more importantly, refer us to the appropriate professionals when required. Her network is extensive, and she utilizes it exceptionally. Recommend MK with no hesitation or reservations to anyone looking for a successful real estate outcome in Westchester County and Bronxville. Absolute top notch agent and a wonderful person on top of it all.
Jeremy & Alli W.
- July 21, 2022
Enthusiastically recommend MK!
We hired MK specifically because of her reputation for honesty and hard work, and we found that she is most deserving of that reputation. MK is thoughtful, extremely diligent, and she knows EVERYTHING there is to know about Bronxville real estate and the Bronxville community. She was kind and respectful of our thoughts and opinions, while earnest and persistent in telling us her professional judgments. She went above and beyond in every way, going so far as to bring over some of her own furniture to stage part of our outside space. I highly and enthusiastically recommend MK!
- October 4, 2021
MK is a Pro
MK is a pro. In addition to being so pleasant to deal with, she has a depth of knowledge over a broad array of topics that is invaluable. MK developed a great sense of our needs and wants in finding a home and adeptly handled a number of unique challenges that we faced with regard to the home we ultimately purchased. From financial and tax questions to renovation and design questions, she had thoughtful and well researched answers. But the most impressive aspect of working with MK is how much she cares. I know it's a little cliched, but she really did go above and beyond for us and her concern and conscientiousness were truly genuine. I have no hesitation whatsoever in recommending her and am happy to provide further details if requested
- February 15, 2019
Attentive and Dedicated
Working with MK was an absolute pleasure!!! She was so attentive and dedicated to the sale of our home. She was very responsive and timely with any questions that needed addressing during the process and was knowledgeable about issues that would arise with an older home such as ours. I highly recommend her to anyone in need of a real estate agent
- February 15, 2019
From Staging to Closing
MK recently oversaw the sale of my apartment in Bronxville. Everything was extremely well taken care of from staging to closing. I would highly recommend MK to anyone looking for an agent in the Bronxville area!
- September 3, 2021
Invaluable Guidance and Advice
I had the pleasure of working with Mary Karen O'Shaughnessy for the recent sale of my co-op. Her professionalism, patience and dedication in walking me through this stressful process was a great comfort to me. Her guidance and advice were invaluable. I would highly recommend MK as a realtor. Her pleasant personality is an added plus !
- July 4, 2021
Top Notch Negotiating Skills
MK was absolutely amazing. She has a wonderful knowledge of the area, top notch negotiating skills and is incredibly professional. MK really listened to all our wants and needs and found us the perfect house in a great neighborhood. I would recommend MK to anyone looking for a house.
- February 15, 2019
It was an absolute pleasure working with Mary Karen and Andrea. I met them completely by accident while looking at a new property, and was immediately impressed by their candor, knowledge of the local area and willingness to go right to work. Within a day of meeting them, they provided me multiple listings that met my desires, and more importantly for someone like myself, they were clear to point out all the pros and cons associated with buying each one. Before meeting Mary Karen and Andrea, my experience with real estate agents was distinctly negative. My experience after meeting them, however, was distinctly positive. I can’t say enough about how much I appreciated their prompt, friendly and honest service throughout the process of buying my new place. I highly recommend them to anyone looking for a place to buy or rent in lower New York.
- March 16, 2016
MK is a pro. In addition to being so pleasant to deal with, she has a depth of knowledge over a broad array of topics that is invaluable. MK developed a great sense of our needs and wants in finding a home and adeptly handled a number of unique challenges that we faced with regard to the home we ultimately purchased. From financial and tax questions to renovation and design questions, she had thoughtful and well researched answers. But the most impressive aspect of working with MK is how much she cares. I know it's a little cliched, but she really did go above and beyond for us and her concern and conscientiousness were truly genuine. I have no hesitation whatsoever in recommending her and am happy to provide further details if requested.
- August 10, 2018
Highly Likely to Recommend
MK is very personable and put in an extraordinary effort to help find the right home for us at the right price. We always felt that she was providing the absolute best information, both macro and micro, which in turn enabled us to make a confident decision either way. There was no unnecessary pressure ever, she spent as much time as we needed throughout the process.
- July 24, 2018
The Whole Process was Seamless
MK is wonderful! She was very helpful in the selling of our home. She went above and beyond with utmost professionalism and genuine care making the whole process seamless, timely, and easy. She is very attentive to details, responsive, efficient, and very knowledgeable of the area and market. We highly recommend MK as a realtor who is not only dedicated but truly a pleasure to work with.
- January 21, 2016
An Absolute Pleasure
Working with MK was an absolute pleasure!!! She was so attentive and dedicated to the sale of our home. She was very responsive and timely with any questions that needed addressing during the process and was knowledgeable about issues that would arise with an older home such as ours. I highly recommend her to anyone in need of a real estate agent.
- August 10, 2018
MK & Andrea are Amazing
MK and Andrea are amazing. We have moved many times in the last 10 years and have NEVER had an agent team as effective. Kind, knowledgable, honest, transparent, connected, thoughtful, and funny are just some of the words that come to mind when recalling our time with MK and Andrea shopping for a home in Bronxville. They gave us the inside scoop on every home, neighborhood, restaurant, church and sport. MK and Andrea are fantastic at matching clients with a great home and helping them negotiate, but they are also much more. They are ambassadors, fellow parents, trusted advisors and friends. We simply cannot recommend them enough!
- August 10, 2018
Proactive and Full of Ideas
"Over the years, we have worked with a number of good real estate agents on both sides of the transaction, but none better than Andrea and MK. We had planned on interviewing several agents to list our home, but after meeting Andrea and MK and seeing their preparation and approach, we hired them on the spot. They were professionals from that point forward--organized, knowlegeable, accessible, proactive and full of ideas to sell our home. And, most importantly, they are nice people. They began as our agents and, several months later, became our friends."
Robert & Simone Gadossy
- May 12, 2017
Professional from Start to Finish
Thank you again for your help in the sale of my apartment. You were very professional from start to finish in staging, photographing, listing and the actual sale process. I appreciated your responsiveness and guidance throughout this process that ended with multiple favorable offers above asking.
- June 4, 2017
Profession Approach v. Pushy
We met MK at an open house an immediately were impressed by her knowledge of the area, willingness to get information on listings, local resources and attention to detail. Her approach is professional versus pushy. She has a great sense of urgency, was always available for questions and expertly guided us through our first time NY state purchase. We will use MK again should we need to list our house or purchase another. We would highly recommend MK to anyone in need of a realtor.
- November 12, 2015
Available & Supportive Every Step of the Way
We had a terrific experience working with MK! She is incredibly friendly, patient, and responsive. MK really listened to us and quickly grasped what we were looking for. She was always available to us and supportive every step of the way. MK was a pleasure to work with and I'd recommend her to anyone - but especially those looking to relocate from NYC. She helped us to find our ideal home in Westchester and we couldn't be happier!
- October 22, 2015
Sincere Care & Kindness
While I was desperate to find a rental apartment, and did not hear back from other agents, MK helped me very kindly and persistently until I secured a place. After I signed the lease, due to an uninformed problem from the landlord's part, my moving-in had to be postponed. MK followed up the issue very seriously until it got resolved. She definitely went above and beyond her duties and showed sincere care and kindness.
- July 28, 2015
MK is in the Top 1%
I have worked with a lot of Real Estate professionals and I was blown away by MK's level of dedication and attentiveness. She was always on top of everything and went above and beyond every step of the way. Trust me, 95% of the RE agents out there are terrible, lazy, unmotivated and just not good at their jobs. MK is in the top 1%. A rare find. Hire her today, seriously, you will thank me.
- July 22, 2015