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Justine Mangione

Agent

    Bio

    A New York City native, Justine relocated to Baltimore with her family in January 1996 and has proudly called the area home ever since. A licensed Realtor® since 2003, she brings over two decades of hands-on experience, deep local market knowledge, and an unwavering commitment to her clients. Justine serves clients throughout Baltimore County, Baltimore City, Harford, Carroll, and Howard Counties, helping them navigate each market with confidence and clarity.

     

    Consistently recognized as a top producer, Justine believes real estate is the ultimate service business. She is known for truly listening to her clients, earning their trust through dedication, professionalism, and results. This client-first approach is reflected in her strong referral-based business and long-standing relationships.

     

    Justine expertly guides buyers, sellers, and investors through every step of the transaction with a strategic plan, a results-driven mindset, and skilled negotiation. She is delighted to work with first-time homebuyers, seasoned investors, and sellers alike—whether assisting with an entry-level home or a luxury estate. Every client is valued, and every goal matters.

     

    Committed to ongoing education and excellence, Justine has achieved the following professional designations: GRI (Graduate, REALTOR® Institute), ABR (Accredited Buyer’s Representative), and CNE (Certified Negotiation Expert)—further reinforcing her ability to deliver exceptional service and outcomes.

     

    A cum laude graduate of Marymount Manhattan College with a B.A. in Business Administration, Justine previously built a successful career in New York City’s premier hotel industry, rising to the position of Director of Catering. There, she combined her business expertise with her passion for food, wine, and entertaining—skills that translate seamlessly into her real estate career.

     

    Outside of real estate, Justine enjoys reading, traveling, spending time with family and friends, and maintaining a great sense of humor—an attribute her clients truly appreciate during what can be a complex process.

     

    Justine is partnered with Mary Ann Gruntowicz as the Platinum Team of Cummings & Co, because every client deserves that level of service!

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    Reviews


    Highly likely to recommend

    “We highly recommend Justine. She will be our realtor for life. I’ve bought two houses with her and sold one and I don’t feel like it could have gone smoother in any of the deals. She is friendly, knowledgeable, and always available. She made the whole process a breeze. She will fight for you and always has your best interests at heart. Thank you for everything you do Justine!”

    Highly likely to recommend

    “You epitomize what's good, not only in our industry, but in humanity! It's been a pleaseure & I hope to work with you again soon.”

    Highly likely to recommend

    “Justine was the perfect agent. She was extremely patient with us and not the least bit pushy. She knew exactly what we wanted and guided us throughout our search. At the end of the process not only did we end up buying the perfect house, but we gained a friend who then went on to my find my mother the perfect retirement condo.”

    Highly likely to recommend

    “Several years ago I had the unfortunate responsibility of cleaning out and selling the home in Ruxton where I had grown up and and where my parents had lived for 48 years. The task to me was daunting. Justine Mangione, my friend and real estate agent supported me throughout the process, suggesting necessary upgrades and changes. With her help we were able to sell the house in just 10 days for an excellent price!”

    Highly likely to recommend

    “Justine recently sold my parent’s house and we could not have been more pleased with the outcome. Justine’s attention to detail, knowledge of the housing market and professionalism when dealing with not only the buyers but also other realtors helped produce an exceptional result. We have referred multiple prospects to Justine due to her trustworthy approach, her results oriented nature and most importantly her high work ethic. I definitely will continue to recommend Justine’s services to perspective buyers or sellers because I know she will work hard for them.”

    Client's Success Stories

    Testimonials

    "It was great Mr. Luis Carrillo he is an expert in what he does. I recommend him 100/100 because he is a good negotiator, he explains the conditions of the house, he always keeps you up to date with what is happening thanks Luis for helping me buy my first house"
    "Luis did an outstanding job helping with the purchase of the home! He helped answer any questions we had and always answered the phone quickly to ensure the process was going smooth. Luis provided each and every service needed very quick. Luis helped find a great inspection company and everything went smooth with the inspection and all the repairs were made on time. I recommend Luis on anyone lookRead MoreRead Less
    "Excelente muy profesional lo recomiendo me ayudo mucho una comunicación muy excelente los ayudo a encontrar una muy bonita casa mi esposa y yo estamos muy contentos gracias Luis Carrillo"
    "When choosing an agent, we needed someone who was prompt, efficient, in the know, and easy to work with. We hit the jackpot with Jennifer, as she was all this and more! Jenny went above and beyond what was required, and she made our home buying experience top notch! I highly recommend hiring her as your realtor!"
    "Jennifer was absolutely outstanding. She not only helped us sell our townhouse, but she also made sure that we closed on the house of our dreams. Jennifer made the whole process so much easier than it could have been. She was also great at answering every and any question that we had along the way. She was reachable for us and quick with the answers we needed. Can't thank her enough for all of herRead MoreRead Less
    "I have been buying and selling homes for 40 years. Without hesitation, Jennifer has been the best agent I have ever had the good fortunate to work with selling a home. Jennifer understands what consumers desire, she has a great network to work with and she has an eye for details that will delight homebuyers, and allow sellers to maximize the value.of their home. It’s rare to find a real estate ageRead MoreRead Less
    "Carmella was a delight to work with while looking for our new home. She is a dedicated and persistent relator that goes above and beyond. She is always quick to respond and makes herself available 24/7. I would recommend Carmella and her team to anyone looking to buy/sell! Thank you for helping us find our perfect home!!"
    "Carmella is attentive, friendly, and willing to work with you at every aspect of the process. I was intimidated to go through the house buying process, so I appreciate someone who was honest and had my best interest in mind. I am fortunate my experience was so painless because Carmella's effort and ability. Thank you Carmella!"
    "Carmella was PHENOMENAL! I purchased 2 houses through her. During my first time looking for a house, I was unaware of what I wanted (just that I wanted to get out my mom’s place lol) and she helped direct to my dream condo! When I wanted to grow my space, she helped me sell my condo and helped me look for my second home. She was so patient with me; we spent months looking for both houses. When I tRead MoreRead Less
    "When I was looking to buy my first home, Laura was recommended to me by several coworkers. She took the time to listen to what I was interested in, find me homes within my budget, and help me with the entire buying process. I didn’t feel like a number or a sale - she truly cares. I 10000000% recommend her, and if I ever plan to move, she is my first choice."
    "Laura provided exceptional services, going above and beyond. She was amazing through the whole process - we received an offer and signed at asking price. She is very knowledgeable of the greater Baltimore area. I would recommend without hesitation."
    "Laura was our realtor when we first started looking for a house in 2014. She worked tirelessly, showing us house after house that fit our needs, but just wasn’t the one. When we finally found our first home, we were so excited, and Laura was there for us every step of the way. From that moment on, we knew we had found not only an incredible realtor but a lifelong friend. When we outgrew our firstRead MoreRead Less
    "John did a great job listening to exactly what we were looking for. With the current market we felt he prepared us for all the different scenarios. John was responsive and always available if we had questions or wanted to look at a home last minute. We are so happy he found us a home we are excited about and met all of our needs, highly recommend!"
    "John was an amazing Realtor for my husband and me when we were looking for our second home near the ocean. He was super responsive when we needed anything or had a question or concern. He made this extremely easy for us . I would highly recommend him to be your realtor."
    "John has been our go-to realtor for years, and we wouldn't trust anyone else! Over multiple transactions, he's consistently delivered expert guidance, honest advice, and outstanding results. He knows the market inside and out, is always responsive, and genuinely cares about his clients. More than just our realtor, John has become a trusted advisor we can count on. Highly recommend!"
    "One of the best decisions I've made recently was to work with Jess on my recent home purchase. It can be tempting to purchase a home without a realtor, but simply put - I would not have finished this process without Jess. I wish I could say it was a seamless experience, but there were substantial hurdles along the way and Jess managed all of them effortlessly. In some cases, people can sometimes wRead MoreRead Less
    "What is there to say about Jess? There wasn’t a minute of the day that we didn’t run to her with all of our stress, worries and what-ifs where she didn’t put us back at ease in a moment. She’s responsive, kind, interested, and she genuinely cares about her client’s future. She worked hard to make it happen. We went through a roller coaster together in this unpredictable market. In the end, she gotRead MoreRead Less
    "I can't recommend Jess highly enough. From the very beginning, she was incredibly helpful, caring, and genuinely compassionate. Buying or selling a home is rarely a simple process, and we faced more than our share of obstacles and unexpected hurdles along the way. Through it all, she remained patient, positive, and completely dedicated to helping us reach the finish line. What truly sets her aparRead MoreRead Less
    "What I appreciated most about working with Jessica Mack was her genuine commitment to building a trusting relationship. Throughout my home buying journey, she made it a point to keep me in the loop, even when the news wasn’t ideal. That kind of honesty and transparency helped me stay grounded and avoid feeling overwhelmed. Her support transformed the experience from something potentially nerve-wraRead MoreRead Less
    "Working with Lindsay was an absolute pleasure! Lindsay expertise in the Harford County area market was evident. She is incredibly knowledgeable and professional and genuinely cares about her clients. She listened to our needs and negotiated expertly. She handled all the details, making the entire process stress-free. Good communicator and she kept us informed at all times. I wouldn't hesitate to wRead MoreRead Less