
Trusted Upland Realtor
Since 2002.
Experience. Guidance. Results.
Helping you navigate your next move with confidence
For more than 24 years, Sonja Coffee has helped buyers, sellers, families, seniors, trustees, and investors throughout Upland and the Inland Empire achieve their real estate goals. From residential sales and relocations to probate, trust, senior transitions, and downsizing, Sonja provides experienced guidance, clear communication, and exceptional service from start to finish.
Residential Sales • Probate & Trust Sales • Senior Transitions & Downsizing • Relocation • Investment Properties

A refined approach to Southern California real estate.
Sonja built her practice on a simple belief: every transaction is personal. From first-time buyers to seasoned investors, her clients return — and refer — because of the calm expertise, candid counsel, and quiet confidence she brings to every conversation.
Headquartered in Upland and serving the Inland Empire, Sonja represents homes that range from cherished family residences to architectural showpieces — each marketed with editorial care.
Continue ReadingThoughtful representation, end to end.
Luxury Listings
Editorial-grade marketing, professional photography, and a curated buyer network that elevates every property.
Buyer Representation
Discreet, strategic guidance — from off-market opportunities to negotiation and close.
Relocation & Investment
Deep local intelligence across Upland, Claremont, Rancho Cucamonga, and the Inland Empire.
Hyper-local fluency, neighborhood by neighborhood.
Explore the towns and cities I represent across Upland and the Inland Empire.

Upland
Explore UplandSan Antonio Heights
Explore San Antonio Heights
Claremont
Explore Claremont
Rancho Cucamonga
Explore Rancho Cucamonga
Fontana
Explore Fontana
Ontario
Explore OntarioTrusted by families across the Inland Empire.
Verified five-star reviews from Sonja's Google Business Profile.
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Ready to make your move?
Whether you're listing a home, searching for the right one, or simply exploring the market — start with a private, no-pressure consultation.
