Experience Matters. Relationships Matter More.
24 Years. Hundreds of Families. A Reputation Built on Trust.
Since 2002, Sonja Coffee has helped buyers, sellers, families, seniors, trustees, and investors navigate some of life's most important real estate decisions throughout Upland, Rancho Cucamonga, Claremont, and the Inland Empire.
As a REALTOR®, Senior Real Estate Specialist (SRES®), Certified Probate Specialist, and Quality Service Certified professional, Sonja provides experienced guidance in residential sales, probate and trust transactions, downsizing, senior transitions, relocation, and investment properties.
Known for her excellent communication, integrity, and client-first approach, Sonja is committed to providing personalized service, honest advice, and strategic guidance tailored to each client's unique goals.
When she's not negotiating contracts, previewing properties, or helping clients navigate their next move, you'll find Sonja supporting local businesses, serving as a Chamber Ambassador, volunteering in the community, and connecting with the people and organizations that make the Inland Empire such a special place to call home. These experiences continue to influence her approach to real estate—one built on service, relationships, and a genuine desire to help others.
The values behind every client relationship.
Communication
Clear, proactive communication that keeps clients informed and confident every step of the way.
Expertise
More than two decades of experience navigating residential sales, probate, trust, downsizing, and relocation transactions.
Advocacy
Protecting your interests through skilled negotiation, strategic guidance, and honest advice.
Service
A commitment to exceptional care, responsiveness, and support long after the transaction closes.
"I measure success by who refers me next."
More than 75% of my business comes from past clients and referrals—a reflection of the trust, relationships, and results I've built throughout my career. That's why I focus on excellent communication, honest advice, and exceptional service every step of the way. My goal isn't simply to help you buy or sell a home—it's to earn your trust and become your Realtor for Life.
