Luxury Service At Every Price Point


Blackstream | Christie’s International Real Estate

BlackStream | Christie’s is the residential division of BlackStream, LLC. Our mission is to provide unparalleled professionalism and exceptional service while actively advocating on behalf of our buyers and sellers through leadership, experience and knowledge while implementing honesty, loyalty and ethical business practices and building long-term relationships. Our agents and support team provide Luxury Service at Every Price Point.

Our affiliation with Christie’s International Real Estate allows us to offer exclusive homes and luxury real estate services to buyers and sellers worldwide. It is driven by the global span and expertise of their affiliate network which extends to more than 138 brokerages in 46 countries. With our Christie’s affiliation we have access to unparalleled resources, tools and exposure for our clients and agents. Whether you are in need of local, national or international reach, we are able to provide you with the resources to buy or sell your home.

BlackStream | Christie’s further extended its reach into North Carolina by partnering with Ivester Jackson | Christie’s, the 2017 Christie’s International Real Estate Overall Affiliate of The Year. Ivester Jackson BlackStream | Christie’s International Real Estate is comprised of the region’s most established and knowledgeable brokers with extensive roots and local knowledge of Asheville and western North Carolina’s finest properties. The company offers white glove service and in-depth local market knowledge from its flagship Pack Square office in downtown Asheville.

Meet The Team

Trusted Leadership

Our mission is to provide unparalleled professionalism and exceptional service while actively advocating for buyers and sellers through leadership and knowledge while implementing honest, loyal, and ethical business practices and building team relationships. We provide unparalleled and exceptional service through innovative, creative and an experienced team of agents and support staff along with tools tailored to serve clients at every price point.


Our Relocation Team

Our experienced team is committed to making your transition to the Upstate stress-free. We aim to provide a unique and personal experience for our clients by learning and understanding their needs and wants. As part of our seamless process we provide: 

  • A guide to the Upstate with local area maps and breakdowns of cities and subdivisions 
  • Area orientation assistance and tours 
  • Home finding services 
  • Knowledge of the area schools, hospitals, retail, and restaurants 
  • Assistance with mortgage loan services 
  • Rental and short-term assistance

We Connect You With Our Trusted Partners:

  • Home Inspector
  • Contractors 
  • Closing Attorney 
  • Lender 
  • Insurance Provider 
  • Movers

What Our Customers Say

"Michael Mumma and Cindy Hosea were beyond helpful in our home search. They spent time with us discussing what we were looking for in a house and, in the process, helped us refine our search. They answered all our questions promptly and thoroughly. Their response were honest and straightforward. They are both from the area and their local knowledge was very valuable. A bi
"I am so happy that I chose to work with Michael as my realtor for my home purchase. He is so knowledgeable about the market, and I felt comfortable relying on his expertise. As a first time home buyer, Michael walked me through every step of the process and was readily available and responsive to my many questions. He ensured that my needs and wants were taken care of thro
"Cindy Hosea is an amazing realtor. I have bought a house with her, as well as sold one a couple years later. She is very helpful and always responds quickly to any questions and concerns. Highly recommend !"
"Michael and his team are the absolute best! They're very experienced and provide great service. They also do a great job using social media to keep attracting attention to active listings. I highly recommend them if you're considering buying or selling!"
"Such an amazing experience! Mike and his team are so professional and helped us find the perfect house for our family! Thank you so much for all your help and hard work!"
"Michael is super knowledgeable and helpful! He’s very responsive and offers great advice! I think it’s rare to find a real estate agent with vast knowledge of construction as well! He was super helpful when walking through homes and helping us envision how we could change things to give us the home we wanted and realistically in the budget we had. He even recommended some
"Michael gets a perfect 5 stars in every possible category. By far the best experience I have ever had with a realtor. I previously had my home listed for almost 6 months with only one low offer. When Michael took over he took improved photos and proposed some minor/inexpensive changes for the home. We had multiple offers within 48hrs and it ended up being purchased above
"We purchased a home in November 2019 and loved our experience with Mumma/Blackstream! We specifically worked with Julie De Bruin and Cindy Hosea. They were both incredible in terms of communication, timeliness and ensuring we understood and felt comfortable throughout the entire process as first time home buyers. They listened to our wants, needs and budget and were very g
"Michael Mumma was excellent in helping us sell our house. He provided expertise to make the process as smooth as possible."
"Michael made this made the home buying process a great experience for my family. He persevered with us in our journey to find a new home that spanned multiple years and from existing home purchase to new build. Michael has excellent knowledge in the entire home buying/construction/financing process addition the real estate expertise. Highly recommended to anyone looking fo

Relocate With Us

We have the tools and expertise to help you successfully navigate through the relocation process.

Buy With Us

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