The Costello Group
Moving The Metroplex
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About Costello Group

My wife, Brandy, and I have been involved in real estate in some form or fashion since we were teenagers. We have worked in numerous fields inside of real estate and have a great understanding of homes and the home buying/selling process.

Real estate has changed our lives for the better and we enjoy positively influencing the lives of all of our clients, too. We have 3 boys and they are our "why" for this endeavor! Anyone that knows us, knows that our youngest, Carter, just might be with you from beginning to end. He loves going to closings!

We are not part of a large team, when you hire us... you get US! We don't hand you, your home or your file off to anyone else besides each other! We will be with you every step of the way! Of course we have a phenomenal team of professionals that we work together with that handle your transaction with the same care and attention to detail that we do!

As a teenager I worked in residential and light commercial construction and repair. While doing so I began working for a handful of investors and taking part in their renovations. Brandy began working in the appraisal field while still in high school and did so until becoming a REALTOR®. Brandy has a keen eye for the latest trends and designs. She will help you envision your new home or investment home no matter the current condition. We have combined this knowledge and experience to renovate homes for our own business, plus clients needing to sell. With this information we can help navigate you through the home buying and selling process to help you make the best decisions for you and your family.

Whether you're a seasoned investor, bought/sold multiple homes without representation before, looking for a second home, moving up/down, or first time buyer we are happy to meet you wherever you are in the process! We look forward to working with you!



We met Mark by happenstance when we stumbled into an open house a year and a half ago.  We weren't ready to make the move yet but we had a great conversation and felt like we had made a new friend.   When we had decided it was time to make the move to Texas we initially enlisted the help of a family friend who is a realtor part time.  After some discussion and advice we realized that we needed someone full time and the only person we wanted to give our business to was Mark.  That 10 minute meeting a year and a half before had stuck with us and we knew we could trust him to handle our out of state move.  We contacted Mark and were shocked to learn he remembered us!   We had a 20 minute phone call with him where we gave him our "needs" and "wants" and he went to search.  We received several emails a day with possible homes and he was constantly at our beck and call for answers to questions and odd requests.   We came to town, he picked us up at our hotel and happily drove us around, answering all our questions and showing us homes.  When we found the one we loved there was no question - we just knew - and Mark did too!   We put in the offer based on his expertise of the area and after a couple negotiations the offer was accepted.  We were already back in Arizona dealing with a family emergency when the offer was accepted and Mark did all the work for us.  It was truly like putting our trust in a family member - not a realtor we had only spent a few hours with.   He took the time out of his schedule to go to the house for all our inspections, appraisals and everything that needed to be done since we couldn't be there.  He put us in contact with Luke Hamlett at Supreme Lending - who was another incredible experience.  We trust these two gentlemen with everything and will recommend them to everyone we know and will use them again ourselves if we ever decide to move again. Mark is truly one of a kind.  A brother.  A friend.  I would highly recommend him to anyone buying or selling a home.  

Jessie M

I am truly grateful that I chose Mark to represent me. He made my home selling process go smoothly. He went above and beyond for me so he is more than highly recommended. Mark is the most professional, patient and amazing agent I’ve ever had. He really listens and he’s very thorough. He answered all my questions so I felt comfortable through the whole process, even after closing. I’m thinking, if only he was was a divorce divorce would have had better results.


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