RE/MAX Champions | Upland

Meet Jeff Upp, a standout real estate agent making waves in California's thriving property market. With a perfect 5-star rating from 36 glowing reviews, Jeff’s reputation speaks for itself. Over the past year, he has successfully sold five properties, demonstrating an impressive knack for getting homes off the market in just 25 days, on average. Specializing in single-family homes, condos, and townhouses, Jeff has achieved total sales of over $3.1 million, with the average sales price soaring to $623,000. Jeff’s current focus is on the Rancho Cucamonga, Upland, and surrounding areas, where two active listings are set to delight prospective buyers. His local knowledge, combined with a strategic approach to marketing and negotiation, ensures every client receives personalized, top-tier service. Jeff Upp is the real estate professional you want by your side to navigate one of life’s most significant investments. Connect with Jeff today to turn your property dreams into reality.

The combined knowledge and over 20-year experience of The Mendoza Realtors team, selling over 200 homes, has allowed us to fully understand how to help and guide our clients so they benefit in the current market conditions and what type of investment will provide the most value. We understand the challenges of buying and selling a home. We serve our clients better because there is not one of us but, an entire team consisting of lenders, home inspectors, plumbers, electricians, professional photographers, and an attorney to address your needs.

With her ability to communicate and generate trust with her clients, Sonja brings her expertise and experience as an award-winning Realtor® with Re/Max Champions. Sonja’s clients value her go-getter personality, negotiation skills and integrity. As a result, she has earned several awards for her work, including the Rancho Chamber 2021 Real Estate Professional of the Year Award, Re/Max International 100% and Executive Clubs in 2024, 2023, 2022, 2021, 2020, 2017, 2016 and 2015. Sonja consistently achieves outstanding results in an ever-changing market with her creative and innovative ideas and strategies. She prides herself on having an impeccable reputation for being honest, ethical, and a great problem solver. Sonja’s clients are her biggest fans, and that’s illustrated in their multiple 5 Star reviews and testimonials. Sonja continues to build her business as a Top Agent by designing her team to help homeowners maximize their equity in the selling process. When asked about her philosophy on client service and helping families get their homes sold, she said, “I believe that excellent communication and true transparency is key to a successful sale. Selling a home and going through the moving process is one of the biggest transitions we’ll make in our lives. My goal is to help clients make that transition as seamless and pleasurable as possible. I am 100% focused on getting my clients the most amount of money, in the least amount of time, and with the least amount of stress, all while ensuring they have a world-class experience throughout the entire real estate process.” In working with Sonja, her goal is clear: Superior customer service with the utmost care and respect for your real estate needs and goals.