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The Blackman Group


D Best Top Producers 2018-2023
D Best Realtors 2018-2023


Luxury Homes Specialists
Historic Home Specialists
Seniors Real Estate Specialists


Charitable & Community Involvements
Moody YMCA Board Member, Class of 2021- 2023 
SMU Football Life After Ball Mentor
Connecting Point of Park Cities Board Member, 2021- present
Park Cities Rotary Club 

Client Testimonials

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"Diana and Chris and the entire Blackman Group team are incredible to work with and I would recommend them 100 times over for their level of professionalism and personalized care that they brought to the table for selling our family's home. They are simply awesome! From the beginning, I received 10 STAR service on a 5 Star scale. They are extremely knowledgeable about the area markets and helped make a large project of selling a home for an Estate and getting it ready as easy as possible. They were my feet on the ground and they truly went above and beyond to make sure that the house was secure, cleared out, and ready for market. They completely supported the project and brought a level of care and consideration that deserves the highest praise. Every step of the way, they watched out for our best interests and the bottom line AND we even closed earlier than expected! If you are looking for someone who will work for you and provide exceptional service and care, then look no further. This is YOUR TEAM! 1000%. The Blackman Group - they are the best!" - Paula P.

"5 stars simply doesn't do the experience justice. If there were more stars they would get them! Diana and Chris were an absolute pleasure to hang out with. Yes that's right, I said hang out and not work with. They made our property search effortless and stress free, so much so that when they called about a property that matched our needs, it felt like old friends meeting to hang out. I looked forward to not only seeing what they had found for us, but to see them as well. At no time did it ever feel like work. They took a genuine interest in what we wanted individually and as a couple and wouldn't let us settle for anything less. They really make you feel like they had our best interests at heart. They will always be involved with any of our property needs moving forward and will always be recommended by us to others." - Shane D.

"Mary Katharine is a true professional and a pleasure to work with. She made the transaction for our family’s new lake front property a breeze and her responsiveness and real estate acumen is top notch. She was totally on top of everything that needed to be done from start to finish, making sure we didn’t miss a beat. We can’t wait to enjoy our new property thanks to Mary Katharine!" - Vic K.

"I had a wonderful experience selling my house with Mary Markey! She is fantastic and made the entire process easy!" - Bridget F.

About The Blackman Group
Commitment. Expertise. Passion.

The Blackman Group (TBG) is headed up by Chris Blackman, a “DBest” designated realtor and recognized top producer in the Dallas Metroplex. Family homes, investment properties, recreational properties, and luxury leases: TBG handles it all with responsiveness to our clients and deep knowledge of the market.

Whether we are helping with a “make-ready” to bring a property to market or are searching for the perfect new home, TBG team members show their energy and enthusiasm for matching clients with properties they will love.

Chris is joined by several invaluable team members:

Diana Blackman, a Dallas native, swears she is “the Search Queen,” as she loves nothing more than finding the right fit for her clients when it comes to neighborhood, schools, commute, etc. Focusing on working with buyers, Diana is in constant pursuit of hip pockets and other hidden gems that will spark joy for her clients.

Mary Markey, a fourth-generation Lakewood resident, enjoys all aspects of home buying and selling. From assisting sellers in staging their homes or helping buyers envision the potential in a property, Mary’s clients are guaranteed an enjoyable real estate transaction.

Mary Katharine Gill, as a Park Cities native and graduate of Highland Park High School, she has deep roots in the Dallas community. Mary Katharine went to the University of Georgia to earn a B.B.A. in International Economics and then moved to Atlanta to begin her career in sales. Continuing her desire to explore, she spent time in New Orleans and went on to live in Costa Rica for five years with her husband, Martin, and two sons, where she became proficient in Spanish. In Costa Rica, Mary Katharine helped Martin in his Real Estate career and raised their boys.

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Team Agents

The Blackman Group’s Listings

Listed By Compass


Square Feet
Listed By CompassOpen: 12/9 11:00AM - 12:30PM


Square Feet
a front view of a house with a garden
a front view of a house with garden
a front view of a house with garden
a living room with furniture and a fireplace
a view of livingroom with furniture and closet
a living room with furniture and a flat screen tv
a living room with furniture and a window
a living room with furniture and a large window
a kitchen with stainless steel appliances granite countertop a stove top oven a sink a dining table and chairs
a kitchen with stainless steel appliances granite countertop a stove a refrigerator and a sink
a view of a dining room with furniture
a kitchen with stainless steel appliances and cabinets
a kitchen with a stove sink and microwave
a bedroom with a bed and a chandelier
a bathroom with a bathtub shower sink and mirror
a bathroom with a granite countertop bathtub sink double and mirror
a view of walk in closet with clothes and shoes
a bedroom with furniture and a flat screen tv
a view of a workspace with furniture and a window
a bathroom with a sink toilet and shower
a utility room with dryer and washer
a view of entryway with livingroom
a front view of a house with garden
a view of a backyard
a view of a lake with houses in the back
Listed By Compass


Square Feet