I can’t speak highly enough of Tammy Castello at Byrne Real Estate Group. Her professionalism, knowledge, honesty, integrity, communication, and hard work ethics are very much appreciated and respected. She is detail oriented, honest, good with people and has a knack for matching the tenant with the owner…. making it the perfect fit for your home. She is your go to when you need to sell or buy your next home ⭐️⭐️⭐️⭐️⭐️ I would give her 10 stars if I could!

I have known Tammy Costello for 13 years and I can honestly say I trust her as a friend and successful businesswoman.
Tammy is great at communicating with people.
She will go above and beyond to find the right house/home for her clients and their needs.
You couldn’t have a better businesswoman on your team!

Tammy is a great and wonderful person to work with! She is very passionate about what she does and communicates with you in a way that makes you feel comfortable. She is knowledgeable in every aspect of her work and has no problem explaining things to you in detail as well as giving you all the answers to your questions. Overall she is just an amazing human being and I would definitely recommend her for any buying/selling of your home!

Tammy is a great real estate agent with a wealth of knowledge and is very friendly & easy to approach.

Our home buying experience with Lesley and Tammy was stellar! The upfront information they provided helped us understand the experience we would have with this team and in this market, and we felt supported the whole way through. We enjoyed and gained from all of our conversations, whether walking through homes or finalizing the details of an offer. We felt secure in the expertise this team provided, supported in our unique goals, and assured by their dedication to fight for our offer and get things done no matter the time crunch. We love our new home and are so thankful!!

Tammy from Byrne Real estate Group in Austin was beyond helpful. She turned what should have been a stressful experience into an amazing one. She was extremely thoughtful and knowledgeable on the area and showed us exactly what we were looking for! Didn’t know the house buying process could be this enjoyable and easy! Would definitely recommend.

We moved to Round Rock from out of state - a life-changing experience. The process is frustrating, confusing and scary. Selecting Byrne Real Estate Group was the best decision we made. Lesley, Tammy, Christine & the whole team were nothing short of amazing! They were incredibly responsive and professional. They took much of the stress away and were there for our every need & then some. We cannot thank them enough and we have already recommended them to friends who are considering moving here. From the bottom of our hearts - thank you so much!

We had the most extraordinary and pleasant experience with Lesley Estes and Tammy Costello, These two are exceptional / outstanding . We were very impressed with Lesley and Tammy ‘s professionalism and real estate knowledge. We felt confident in their guidance regarding Austin real estate market. I have nothing but gratitude to this duo . We highly recommend them. Thank you, Lesley and Tammy, the VIP Austin real estate team !

We can’t express how professional, knowledgeable, and caring the Byrne Real Estate Group have been. Tammy Costello, Realtor and Stephanie Hansen, Director of Operations are exceptional at what they do for their clients. Tammy has gone above and beyond to sell our home as well as assisting us with finding our next place. She is a rockstar! Then there is Stephanie who has kept us informed through the entire process, answered questions, and has made it so much easier. She is always so pleasant and accessible. You can’t go wrong with this team.

Tammy was our real estate agent and she was amazing! God send. Moving to Austin from Cali, we had no idea where to even begin. Tammy helped us narrow our search. We looked for months! Trying to find our perfect home and she was there every step of the way. She’s patient, kind, on top of it and when needed straight forward and stern. Well rounded. I can’t thank her enough! I know we weren’t easy clients so anyone reading this looking for a realtor in Austin this is your sign. Give her a call. You won’t regret it.

We recently had the pleasure of working with Tammy Costello from the Byrne Real Estate Group, and I cannot express enough how amazing my experience was. Tammy's dedication, patience, and expertise made the process of finding our perfect home in Austin, Texas, an absolute delight.

From the very beginning, Tammy displayed exceptional professionalism and attentiveness. She took the time to understand our needs, preferences, and budget, ensuring that she had a clear understanding of what we were looking for. Her knowledge of the Austin area was truly impressive, and she expertly guided us through the various neighborhoods and communities.

I cannot recommend Tammy and the Byrne Real Estate Group enough. If you're in search of a dedicated, patient, and knowledgeable real estate agent in Austin, Tammy Costello is the one to trust. She will go above and beyond to ensure your needs are met, and her genuine passion for helping clients shines through in every interaction.

Tammy Costello was a blessing to us. She assisted us in finding a rental when moving from out of state and was so pleasant and positive during that experience. When it came time to purchase our home, Tammy was amazing!!! She answered our questions with real honest feedback and the rare instances she didn’t have the answer, she would tell us that she would get us the answer and then deliver on her word. Never at any time was there any pressure as there commonly is with agents.
I can’t imagine going through the process with anyone else. Her upbeat attitude and kind character made her so fun to be around!