Helping East Bay Seniors & Their Families Navigate Downsizing with Care, Expertise, and Trust.
From first-time buyers to downsizing in retirement, I’ve got you covered. As a certified Seniors Real Estate Specialist (SRES), I’m here to guide you
with confidence—your trusted real estate
partner in the Bay Area.
About Me
Trusted Guidance for Right-Sizing and New Beginnings
I'm Allison Costelow, a Seniors Real Estate Specialist® (SRES) and top-rated Realtor® proudly serving Benicia and the greater East Bay. My heart-centered mission is to help seniors and their families navigate the emotional and practical aspects of moving—whether that's downsizing, relocating, or transitioning to a senior living community.
But this isn’t just a career—it’s personal.
Before I ever stepped into a home as a Realtor®, I was a Certified Nursing Assistant (CNA). I saw firsthand the deep need for patience, understanding, and dignity during life’s later transitions. That experience shaped how I serve today. I believe every move tells a story, and every story deserves to be honored.
As a family-focused real estate professional, I work closely with both seniors and adult children—offering clarity during complex decisions. I bring a blend of market expertise, emotional intelligence, and a vetted network of senior-focused professionals, including estate planners, movers, and senior living advisors.
Whether you're helping mom and dad sell the family home or preparing for your own next chapter, I’m here to walk alongside you—step by step—with clarity, compassion, and confidence.
How I Can Support You:
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Personalized downsizing plans
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Senior-friendly home selling strategies
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Relocation and right-sizing guidance
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Community referrals for aging-in-place solutions or assisted living transitions
🔹 Serving Contra Costa and Solano Counties with heart, integrity, and expert care.
🔹 Specializing in 55+ transitions, intergenerational family moves, and legacy planning.
Ready to Learn More?
Click below to explore how I can help you or your loved one navigate this important transition with clarity and care.
LATEST SOLD PROPERTIES
3 bedrooms
PINE CREEK WAY
This townhome is delightful! This location, close to parks, shopping, and BART, makes commuting and exploring the area a breeze. It is a wonderful place to call home!
RECENTLY SOLD
Represented Seller
3 bedrooms
FRANKLIN LANE
A modern haven nestled in El Sobrante, CA. This stunning residence offers a homey feel for comfortable living that presents an exceptional opportunity in this location.
RECENTLY SOLD
Represented Buyer
4 bedrooms
GRANDVIEW DR
This picturesque 4 bedroom gem is nestled in a highly sought-after neighborhood. Step inside to find a spacious, light-filled floor plan with new flooring throughout.
RECENTLY SOLD
Represented Buyer
3 bedrooms
KAY AVENUE
Discover your dream mid-century modern oasis! This single-story home boasts an expansive, screened deck, perfect for outdoor gatherings. Situated on a charming corner lot with wonderful curb appeal.
RECENTLY SOLD
Represented Buyer
I guide you from overwhelmed to organized, one step at a time.
STRONG NEGOTIATION SKILLS
Allison advocates for her clients' best interests to achieve favorable outcomes. She is adept at handling offers, counteroffers, and navigating complex situations to close deals successfully.
EXTENSIVE MARKET KNOWLEDGE
Allison possesses in-depth knowledge of the local market, including current trends, property values, neighborhood characteristics, and upcoming developments. This expertise allows her to provide valuable insights and advice to clients, helping them make informed decisions.
PERSONALIZED SERVICE
Allison provides personalized service tailored to each client’s unique needs and preferences. She takes the time to understand her clients’ goals, whether buying, selling, or investing, and offer customized solutions to meet those objectives.
WHAT MY CLIENTS THINK
"We love Allison Costelow! Her proficiency as a real estate agent and ability to give families what they want during the home buying and home selling process is this woman’s super power. From the moment we signed on with her we felt her complete dedication to assuring we would get the home we needed at the terms we wanted. She surpassed our expectations! I was consistently met with a timely answer and guidance all the way to the finish line. Painless and extremely fun actually.
Don’t hesitate to work with Allison!"
NICOLE
"Allison is one of the most caring and loving women have ever met. When you are looking into buying a home it's very a difficult, nervous, overwhelming decision. But when you have a friend by your side walking you through everything It's a whole another story. She is there through the entire process and if you ever have any questions is there to answer everything."
Racheal
"We worked with Allison - WOW! What a gift, she took all the stress of home buying away by being so on top of everything, giving us all the need to know details and handling inspections for us. I highly recommend Allison, what a sweet, kind and helpful realtor. She even got us connected with a lender she works with, which made the process that much better. Thank you so much for all your help!"
ASTRID
"Allison is a a go getter. When you want a realtor to fight for you and truly represent your best interest in a real estate transaction she is the one to go to! She is also super kind and a really great listener. She will go at your pace and make you feel like you are her top priority and apart of her family."
NIKI