Tammy Costello

We absolutely love working with our clients and we love nothing more than helping them have a wonderful buying or selling experience. Over the years, our clients have graciously written 1000+ reviews about their experiences on sites like Google, Yelp, & Zillow. We've collected them here.

5 stars for Tammy Costello! The Austin real estate market is crazy and Tammy navigates these crazy times with perfection. Our home buying experience has been great!


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.


Tammy is amazing!!! She really knows the market and how to navigate getting me the best price!!!


Working with Tammy has been a great experience! She has helped me look at places to open a retail space and is very communicative and always follows up and makes time for me. Would definitely recommend Tammy!


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!


Tammy Costello in Austin has been a pleasure to work with. Her expertise and dedication set her above the rest. The communication and negotiation skills that she displays are outstanding. I look forward to working with her again.


Tammy Costello’s service is stellar! She consistently goes above and beyond and is always timely. I can’t say enough about what a joy she is to work with! Thank you, Tammy Costello, for making our property search so easy!


Ms. Tammy Costello is an amazing person who has this intrinsic motivation to helping people find their future home and/or sell their home. She’s very informative, attentive, knowledgeable and experienced in real estate. Communication is key and Tammy is great at that!


Tammy in Austin, Texas is amazing! She is very hard working and driven, she keeps going until she finds exactly what the client is looking for. Tammy is clearly passionate about her job and clients and a great asset to this company! Would recommend her to anyone in search of a home or property!


We recently had the pleasure of working with Tammy Costello, 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. What truly set Tammy apart was her unwavering patience. Despite our ever-evolving criteria and numerous property viewings, she remained cheerful and committed throughout the entire process. Tammy never once made us feel rushed or pressured into making a decision. She understood that purchasing a home is a significant milestone, and she was determined to help us find the perfect place to begin our new chapter in Texas. Tammy's dedication extended beyond our expectations. She spent countless hours with us, often going above and beyond her responsibilities to ensure we were well-informed and comfortable with our choices. She provided us with comprehensive market analyses, valuable insights, and sound advice, all of which contributed to our confidence in making informed decisions. Thanks to Tammy's expertise and tireless efforts, we eventually found our home. I cannot recommend Tammy 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. Thank you, Tammy, for making our home buying journey such a positive and memorable one. We are forever grateful for your hard work and dedication.


Tammy is the absolute best! We relocated from the East Coast and Tammy went well above and beyond. We found a beautiful home in a great area. She listens to your wants and needs, then delivers. Thank you, Tammy!!


I can’t speak highly enough of Tammy Costello. 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 had the pleasure of working with Tammy Costello in the past. Excellent person to work with. Caring and will follow through. You’re in good hands with Tammy!


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


As a fellow realtor, I had the pleasure of working with Tammy on a recent transaction, and I must say, it was an absolute delight. Tammy's professionalism and accessibility were second to none, making our collaboration smooth and efficient. Throughout the process, Tammy proved herself to be a true expert in her field. Her attention to detail and dedication to her clients were evident in every interaction we had. From promptly returning calls and emails to effortlessly navigating negotiations, Tammy's expertise shone through, making her a valuable asset to any transaction. One of the standout qualities of working with Tammy was her accessibility. In an industry where time is of the essence, Tammy was always just a phone call or email away, ready to address any questions or concerns that arose. This level of responsiveness not only facilitated effective communication but also instilled confidence in our ability to work together seamlessly.


Tammy was beyond helpful. She turned what should have been a stressful experience into an amazing one. She was extremely thoughtful and knowledgeable about 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!


Tammy helped us find exactly what we were looking for as first time homebuyers and made the process so easy!!


Tammy helped my family find a great first home.. we would highly recommend letting her help you


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!


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!