About
Jon Mumma
Commercial Advisor
Jon’s career path into commercial real estate is grounded in more than three decades of experience in healthcare finance, including his tenure as a Director of Finance for a community hospital. This background sharpened his ability to navigate complex transactions, analyze data, and provide clients with clear, strategic guidance—skills he now brings to his role as an Advisor with Blackstream Commercial.
Having lived and worked in Greenville and throughout the Upstate for many years, Jon combines professional expertise with a deep connection to the community. His local knowledge, paired with his financial acumen, allows him to identify opportunities and deliver solutions tailored to each client’s goals.
Jon works closely with his son, Michael, as part of Mumma Property Partners, offering clients a multi-generational perspective and a collaborative approach. Together, they help business owners, investors, and developers make confident, well-informed decisions in an ever-evolving market.
In Jon, clients find a trusted advisor who values precision, relationships, and long-term success—someone who views every transaction as an opportunity to create meaningful impact both for his clients and for the Upstate community he calls home.
Areas of Service
Explore the Area
"Barbara was fantastic to work with, and I would recommend her to anyone looking to buy or sell a home. She went above and beyond to put my needs first and helped me accomplish selling my house quickly and strategically. She is very knowledgeable in her field, and her proven expertise helped me make decisions confidently, especially when I was faced with multiple offers. We… had a situation where a buyer backed out, and she was able to secure an even better offer quickly which was 10%+ over the asking price. Above all, she is compassionate, caring, and does her best to keep her client's best interests in mind. She was a pleasure to work with! I would definitely recommend her and her team!"
Ruth
"Barbara Bryant was our agent and she was absolutely wonderful to work with. Our son reached out to Barbara about several different properties and she was very quick to respond and willing to meet him to take a look. After looking at several properties we decided to start from scratch and purchased land to build on. Barbara had our backs through the entire process as the se… ller wanted to play a little hard ball. But us Liberty girls have to stick together. Thanks again Barbara for such a great experience. The Harrisons"
Barbara Shopping
"Barbara was amazing! She did a phenomenal job showing my fiancé and I different properties and catering to our needs. She was very responsive and extremely professional. She went above and beyond to make sure we had everything we needed. I will use Barbara in the future as I’m looking to acquire more rental investment property."
Zudo Puric
"Barbara exceeded our expectations from start to finish on our journey to purchase the home we wanted. Her experience with the presentation of our offer and the satisfaction of the seller shows the type of person you want to handle one of your life’s major decisions. The whole process was seamless and without incident. We will be repeating the process with Barbara for the s… ale of our current home because she is someone we can trust to make complicated tasks effortless and enjoyable. Thank You very much for all you did for us !!"
John
"I could not be happier with my experience working with Barbara. She was extremely accessible; no communication went without a timely response. She was very open to listening to my wants and needs regarding my future home. And then tracking down a home which was the right fit. I always felt she was working with me and supportive during the entire process. Her positive attit… ude, responsiveness, and professionalism were invaluabe. I would recommend her as an agent wiithout any hesitation."
RBreezesJr.
"Barbara did an awesome job with helping me find my first home. She made me feel comfortable and helped me understand everything during my journey of becoming a first time homebuyer. She was always there for me if I had questions no matter what. If I had to do this journey all over again I would definitely pick her again."
Erin Caskey
"This was our 2nd time working with Barbara and she was awesome. She will always be our realtor for SC. She makes things sail very smoothly. Barbara went on a short vacay with her sister but was still available if I needed to call. Thanks again Barbara for a great purchase experience. The Harrisons"
Bryan & Jan Harrison
"Barbara did an outstanding job helping us get our new home. She was very knowledgeable and always prompt with paperwork. She took the time to explain things and fought hard to get us exactly What we wanted. Top tier realtor!"
Mandi
"Barbara did an outstanding job representing us as a buyers agent. We contacted Lake Life Realty via their website and received an immediate response. We spoke with Barbara and scheduled several showings all back to back on Mother's day weekend. She was more than accommodating and willing to help us find an amazing lake house to suit our needs. She is always punctual and do… es exactly what she says she will do. We certainly would recommend her to anyone looking to buy or sell. We purchased from out of state and Barbara made that an easy process by stopping by the property as needed with the inspection and final walk through. We couldn't have asked for a better realtor. Thank you so much Barbara!"
Matt Coyne
"Barbara was fantastic to work with, and I would recommend her to anyone looking to buy or sell a home. She went above and beyond to put my needs first and helped me selling my house. I have known Barbara since our High School days and she very caring, great listener and very hard worker. She knew this was hard for me to list my childhood home for sale. Barbara listened and… helped me through every step of this process, commicating all showings, offers & understanding each process after offer was made. Above all, she is compassionate, caring, and does her best to keep her client's best interests in mind. She was a pleasure to work with during this hard step in life for me. Barbara is also working with my daughter to find her first home to purchase and is helping her learn & understand that process. I definitely recommend her to be your realtor for all your needs!"
Dianne Green
"Barbara was very Knowledgeable about the process of selling my home. Attention to detail was outstanding! I was always aware of the day to day activities.”To buy or sell again she would be to only one I would trust with such an important and serious decision “"
Ike
"Barbara was more than capable, honest, trustworthy, and dedicated to the sale of my fathers home. I live several hours away and she made the process extremely smooth for me. She took care of everything and guided me along the process. Since school started back in August I have been extremely busy. During the day I can't respond so she always waited until the everning for m… y response. I would recomend her services to anyone selling or buying a home in South Carolina."
Kristie and Bryson
"I could not have went through the process of buying a home without Barbara. She was always available and there when I needed her throughout the entire process. She made it easy to manage and I am so thankful for her!"
Camp angell
"Barbara was awesome to work with! She helped me day and night to find the perfect home. It didn’t matter the time or day she always answered any questions I had. I would highly recommend her to everyone!"
Green
"Barbra was great in every way! She helped us navigate the market recommend a great lender, awesome inspection company’s and when we ran into an issue with the septic. She knew how to ensure we were protected and get the issues taken care of promptly. Made us very confident in the entire process and was very responsive. I recommend her to all my friends."
Siedel Patrick
"Best Agent in the World! Barbara was right there when we needed her and a great personality to ease the process of purchasing our perfect home! She is local to the area also and knows all of the ins and outs to help us clear up any details we needed."
Jeff Shealey
"Barbara, my realtor, provided exceptional service that went beyond my expectations. She displayed a deep understanding of the process, anticipating and addressing questions before I had the chance to ask. Her professionalism, kindness, and expertise made the entire experience smooth and stress-free. Thank you so very much for the closing gift, I would recommend you to anyo… ne!"
Marie Warner
"Barbara was absolutely amazing! She went above and beyond what we asked for! She is so sweet and makes the home buying process so easy. I did not have to worry about anything except my lender. She was very knowledgeable when it came to an inspector and taking care of a termite inspection. She is really one to fight for her clients to have the best home possible."
Lauren Stone
"Barbara was the very best that we could have asked for. She was like sitting down with family to discuss the sell of our home. She is very knowledgeable of the market and very caring for her clients. I love that the most. It’s not just a job for her but a passion for helping people make the right selection for their future."
Freddy & Tammy
"In reference to the sale of my property, I sought the assistance of Barbara. From the outset of our engagement, Barbara demonstrated a proactive approach by promptly listing the property on the market. Almost immediately, an offer was received, which she astutely recognized as insufficient and confidently declined on my behalf. Remarkably, the very next week, an offer was … made for the sale of my property at the asking price. I am highly satisfied with the manner in which I was kept informed throughout the entire process. Barbara exhibited dedication by answering all my inquiries and providing reassurance during the sale of my home."
Bazie
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