About Sergio

Your East Bay Area real estate expert!

Contact Sergio


In San Diego for 25 Years


In the world of real estate, trust and clear communication are key. As a licensed real estate broker since 2005, I've built my reputation on providing ethical advice and creating tailored strategies for both buyers and sellers. My focus is on making informed decisions that serve your best interests, backed by years of experience and a commitment to integrity and diligence.

Years of Residential Real Estate Experience
SOLD Homes Throughout the Bay Area

A bit about me — I hail from Central America but have called the San Francisco Bay Area home since I was a boy. I'm a proud UC Berkeley alumnus with a degree in Sociology. My pre-real estate journey was equally diverse and enriching, spanning from financial consulting to advertising, where I honed my skills in communication and strategy.

So, if you're looking for a real estate experience that's as enjoyable as a San Francisco sourdough — distinctive, satisfying, and uniquely Bay Area — I'm your broker. Let's embark on this journey together, with a sprinkle of humor and a lot of expertise.

Buy With Sergio

Why work with Sergio

Committed to providing honest and friendly service

My mission is simple: solve your real estate needs. For sellers, I craft a detailed plan to sell your home swiftly and for top dollar. For buyers, I lay out a comprehensive strategy to turn your home-ownership dreams into reality.

Contact Sergio
Join Our Team

Property Websites

Elevate your property's visibility and appeal through a dedicated property website. showcasing its unique features with precision and style.

Professional Photos

Elevate your image with meticulously crafted professional photography, ensuring your property stands out with captivating visual allure.

Home Staging.

Transform your space into a captivating showcase with our meticulous home staging services, strategically designed to highlight its best features.

Reliable Communication

Weekly check-in calls to make sure that your needs are met and questions are answered.

Vendor Network

Rely on our vetted list of preferred vendors so that you can relax while we take care of photography, furnishing,  and much more.


Getting your offer accepted and your home sold for the highest price is my #1 priority. I work hard so you don't have to.

Team Members


What Past Clients Say

Read More Testimonials
"I recently closed on my first home with Sergio's help and I can't recommend him highly enough. This can be such an intimidating process but Sergio's patience, honesty, and attention to detail made it easier. No text or email ever went unanswered, and he went above and beyond smoothing out the inevitRead MoreRead Less
"Sergio was the best, he took time out of his day to continously answer our questions as well as worked with us dilligently to help us find our forever home. He never pressured me and my wife in any way and was always there every step of the time. I would not have asked for anyone better. By far the Read MoreRead Less
"Sergio really is a hands on professional agent. He took care having all the paper work that was needed to complete this sale. The property we sold was a four plex, with tenants in residence, and he worked with all of them to ease their feelings about the sale of the units and obtain the all the teRead MoreRead Less
"I just sold my condo so very excited and relieved. Sergio was very instrumental as my realtor to get me to this point. The process was demanding and the prospects seemed daunting (based upon reports from media outlets) for a successful sale. Sergio helped me to set realistic expectations and provideRead MoreRead Less
"The one thing I felt was a key to Sergio success in the selling of our home was how quick he got us into a contract. Everything went out so fast. His communication, kindness and professionalism was present at all times."
"We feel so lucky that we stumbled across Sergio Sosa, He is intimately familiar with the Contra Costa county area and has a ton of "inside" knowledge about all community’s. He really understood our needs and went above and beyond to deliver. We are local and after getting out-bid on some houses, we Read MoreRead Less
"Sergio is a great realtor. Very professional! Sold our house quickly!"
"My house sold quickly with Sergio’s help. He took care of the little AND big details to help allay the stress and fear of selling my first home. Very friendly and down to earth."
"I've known Sergio for a number of years, and I can truly say he is one of the best and goes above and beyond. He's always available to assist where and when needed and is right on time with updates whether buying or selling. I will continue to utilize his services as long as I have a need. Thanks SeRead MoreRead Less
"Sergio was the best Realtor I have ever had by far. His attention to detail and his communication are superb and he was very reassuring along the way when I was feeling overwhelmed. Thank you Sergio!!!"
See All Testimonials