Alex Castellano

Portrait photo of Alex Castellano

St. Louis

3537 S Kingshighway Blvd
Saint Louis, MO 63139

Office: 314-353-0336
Email: Contact Me


Alex’s heart belongs to St. Louis. As a life-long resident (born & raised!), Alex is always out & about soaking up all the amazing food, events & architecture this town has to offer. After graduating from SLU, she jumped right into a professional life as a CPA & Financial Analyst, which the detail-oriented, punctual part of her enjoyed. But her helpful, entrepreneurial spirit wanted something more. Real estate has always interested Alex, all the way back to meeting with Jenifer Garcia in high school! 

Alex’s unique expertise includes new construction – she helps buyers every step of the way during the build process. She also loves working with first-time home buyers, buyers relocating to STL, & those in special situations looking to buy or sell one-of-a-kind properties. Some of her favorite neighborhoods are Webster, Sunset Hills, Clayton, The Hill & Lafayette Square. 

Things you must know about Alex: She drives a stick shift & feels like she’s being lazy when she drives an automatic, she has spent a lot of time goofing off & launching t-shirts with Fredbird, & she doesn’t know how to ride a bicycle. Alex & her husband love trying new restaurants, traveling & playing with their two Portuguese Water Dogs. 

Click HERE to visit me "At Home".

Ask Alex Castellano


Alex was the first of three agents that we interviewed when we started the process to sell our house. We knew pretty much right away that we wanted to list with her when she answered all of our questions before we even asked them and because she is an open and honest person. This was our first time selling a house so she walked us through the process and ran us through her strategy for selling our house in Carondelet. Within two weeks we had our house ready to go and Alex set her team to work. We had several showings and an offer before the open house. Then when our plans changed and we decided to buy a new house instead of building, Alex was there with us through the whole process. She helped us narrow down the list and navigate the complicated process. In the end, and after a few very difficult weeks of inspection findings and negotiations with buyers and sellers (all of which Alex handled like the pro she is) we ended up in the house we wanted and it’s all thanks to Alex and her hard work. She has our referral to anyone and everyone wanting to buy or sell a house. Alex is the best!

- Joshua Holland

Alex was recommended to us by a friend. She has far exceeded our prior experience with a realtor. So much so that in retrospect it's pretty obvious that our prior realtor, 18 years ago, was working from self-interest, more than our behalf. Alex was clearly on our side as the buyer's agent. She did not steer us toward properties from her agency or that she was selling. She listened carefully to our needs and concerns, she was very honest when she had concerns about a property she showed us. Alex was responsive even on weekends or evenings. She kept us informed of property availability based on our specs. Once we decided on our new home, she walked us through each and every step. The home inspectors she recommended were outstanding and really went over our new home with thorough care. Alex followed up on all the red flags and contractual back and forth and did so much of the process of keeping everything on target that my husband and I (very busy people) had much less anxiety. I just can't say enough about what a great experience we have had with Alex Castellano. She is smart, honest, committed, thoughtful, and fun. She is also aware of the history of housing discrimination in St. Louis and is a hopeful new partner in helping change that for the better!

- Rebecca Ragland & Scott Ragland

We could not have asked for a better agent and we highly recommend Alex to anyone! We started going to open houses around St. Louis on our own to see what kind of things we liked and ended up meeting Alex at a couple of them. When we finally decided to get serious about buying we reached out to Alex because she struck us as professional, knowledgable, and friendly. It was one of the best decisions we have ever made! We were first-time home buyers so Alex met with us to explain the whole process. She started introducing us to her network of other professionals, starting with our eventual mortgage broker. Alex is an excellent communicator, she always used the right tool (text, email, phone, etc.) for the right situation. By going to open houses with us and getting feedback from us on listings/upcoming listings, she quickly figured out the kinds of things we were looking for in a house and in about a month we were putting an offer on a house. The market was very competitive and Alex helped us build a strong offer that was accepted. Throughout the entire negotiation process Alex looked out for our best interests and was always honest and direct about where things were at. Alex has an amazing network of professionals for inspections, insurance, etc., you name it. We don’t regret a single choice of person or company she suggested we work with, and because she had such a great network it really made things run smoothly for us. Home buying is still stressful of course and we could not imagine having done it successfully without Alex.

- Noah Fahlgren