A California native, Alexandra has witnessed first hand how much the Bay Area has grown over the past two decades. She has an intrinsic understanding of the potential of what’s coming in each given area as well as its personality. Her eye for interior decor and garden design has led her to become the ‘go to’ person amongst her friends and family. She brings all of these skills to her job, helping her clients to find their dream home.
With a successful career in marketing, she has a history of building trusted and lasting relationships as well as a proven track record for attention to detail, clear communication and a project management style of organization. When she’s not out looking at homes to find the perfect fit for her clients, you can find her trying new restaurants, exploring the North Bay and volunteering her time at the Humane Society helping dogs get socialized and ready for adoption.
Testimonials
"When we sold our place in San Francisco in one day, we thought the hard part of moving to
Wine Country was over. Which only shows how naive we were about an extremely aggressive
and competitive housing market. As we quickly learned, not only was inventory very low,
virtually every place we liked attracted multiple,above-asking offers.
Our search ended up taking over a year and Alex was the only agent we used. We got to
know her well on our weekly visits to potential properties. But more importantly, she got to know
us, and what we liked and were looking to buy. She often said a house had come up, but she
knew it wasn't right for us, so no need to make a pointless visit. And, when one came up that
worked, she moved quickly, often getting us out to see it before the first open house.
Alex was great. She kept us motivated when we were discouraged, reminding us not to give in
and compromise. She walked us through more than one offer that failed because we were
outbid. She changed her schedule on a moment's notice. She even drove to Sebastopol to
measure a bedroom to see if our king bed would fit. (It wouldn't.)
After almost a year and a half, we found our house. There were multiple offers but by this
time, with Alex's help, we knew the market. We moved fast, pre-qualified for local financing (key
tip from Alex) and placed a bid that we knew would be competitive. It was a long, stressful
journey, but we love our new house. And now that we know how tough the market is, we truly
appreciate Alex's skill and professionalism."
Chuck & Mary - 2023
"We have used Alex to both sell our previous home and to buy our new home. In both instances, she
exceeded our expectations. Through her marketing expertise, our previous home sold pre-market above
asking price. When we were ready to buy again, we were out of state. Alex toured the home herself while
she Face-timed us. We appreciated her insight and followed her advice for an appropriate offer price.
Happily our offer was accepted and we are happy home owners again. We highly recommend Alex!"
Steve & Mike - 2022
"Alexandra Costello helped me navigate selling my fathers home in Petaluma
in late 2022. I could not have asked for a better Realtor! Her communication and attentiveness
throughout the sale was top notch. I highly recommend Alex if you are buying or selling!”
Sasha - 2022
“Alex was the best agent we could have worked with. She took care of everything. Alex
explained things and guided us through the process in a very professional manner. I would
highly recommend Alex Costello to anyone I know that needs a good real estate agent. I really
can’t say enough good things about Alex. She’s the best.”
Abbie & Marti - 2022
“It has been a true pleasure working with Alex. She was very quick to respond and was able to
show us houses in the area we wanted that met our needs. She listened to us and found us the
right home at the right price. I highly recommend her and would happily use her in the future.”
Fred - 2022
"Our family recently worked with Alex Costello to find our family forever home, and we're so glad we did. As first-time home buyers, we relied heavily on Alex to help guide us through the entire search and purchasing process. Because of various factors including rising interest rates, there was a certain sense of urgency to find something quickly. Despite our hectic schedule, Alex went above and beyond, asking questions we wouldn't have thought of and helped narrow down our search to find us the perfect home well within our budget. She was readily available and flexible to the timing that worked best for our family. She was also great with our children and offered valuable insight into the neighborhoods, schools, and even great places to eat.
Overall, Alex gave us the red carpet treatment and made us feel like we were her only clients. We definitely recommend working with Alex to anyone who wants an efficient, friendly, and knowledgeable realtor you can be confident in and will work diligently to get you the home you are looking for."
Sam & Heather Rael, 2021
"As first time home buyers, we had no idea what we were getting ourselves into. And to be in the middle of a pandemic when showings are scheduled and anxieties are high...Alexandra helped us to find our DREAM HOME! We were first unsure of location and Alexandra was patient and available at a moments notice when we wanted to see a home. She was on top of everything with the proper paperwork needed in order for all pandemic precautions and we were always well informed when homes were either unavailable or accepting offers. She was gracious and kind even when we were ping-ponging around the bay area from the east bay to the north bay lol. We finally settled on a beautiful home in a perfect location in Marin county.
She worked her magic in communicating with the selling agent and was always transparent with us. We found ourselves holding our breath waiting for every call. In the end, we made a competitive offer that landed us this beautiful home! She even recommended our lender to us who was a pleasure to work with as well. Alexandra is well integrated in this industry and it shows. We closed on our first home in only 3 weeks at the height of the pandemic! Amazing! Whenever we had a question or anything seemed unclear, she quickly got us our answers and made us feel at ease. So much of first time buying is confusing and unclear, but Alexandra was so helpful in explaining everything to us. I would highly recommend any buyer to work with her. She truly is in this with you and it feels like having your best friend alongside through this nerve wracking journey. We couldn't be more happy in our beautiful home."
Candice & Adam Marr, 2020
"Alexandra has helped us buy and sell the house on 700 Casella way. Her style of working is very unique and assertive as she is not only a real estate agent for us but a friend and a family member.
Her genuine warmth and concern in looking after our interest is unparalleled."
Sajjad & Gina, 2020
"I love my new home! It started when Alex took me on my first stop that day of five or six homes — all good! But it didn’t actually start there. It began because I didn’t want to waste my time (I was just visiting here), or more importantly, hers! I had told her exactly what was wanted, close to my kids (but not too close), no “fixer-upper”, move-in condition. Done! And Alex did better. She listened and produced ... all I wanted and more. In a nice neighborhood with great neighbors one can only dream of. And the best? It was the first house I was shown. Saw the rest, but came back to the first. Saw it. Loved it. Bought it. She had listened. You are in very good hands with Alex to help you find your dream home."
Betty Lynch, 2019
"Alexandra was a pleasure to have as our real estate agent. Alexandra never left any questions unanswered and always responded promptly. I would highly recommend her over any other agent as she and the people she works with will help you find your home within your budget as well as receive the best service any agent can provide. I know from experience as we were able to buy the house we liked, in our budget using, Alexandra."
Sajjad & Gina, 2019
"We met Alex during an open house in February 2019. We have been searching for our first home for some time and have given our information to various agents. However, no one really followed-up with us until we met Alex. Alex was breath of fresh air as she was enthusiastic to help us narrow down the type of home we wanted and answered any questions we had. She was super helpful to us as we have never been through the home-buying process and were nervous. She made the experience very positive and listened to our needs. In a few short months, we finally got our first home in April 2019. We would definitely work with her again."
Linda & Daniel, 2019
"She's hands down a realist. She reinforced a few strategies that I'm so thankful for: take it one house at a time, and don't get attached. When we lost our first offer, I was already prepared and ready to keep hunting.
Buying a house as a first-timer, especially as a woman, can be challenging. I had a lot of questions and a ton of fears. What was so perfect about working with Alex was that she met me where I was. She answered my questions and prepared me for all the potential obstacles. Alex is a pro, she'll find you the house you're meant to live in."
Kathy Simpson, 2018
"Alex Costello made buying a home a joy! She helped me figure out the area in Petaluma that best suits my needs, she showed me the opportunities within my price range, along with all the potential each home had. She was there to get me through the entire purchasing process, the ups and downs. Without her, I would not have found my new home."
Jennifer Douglas, 2017
