San Antonio Heights, Upland: A Foothill Luxury Neighborhood Guide

San Antonio Heights is an unincorporated foothill community above Upland, at the base of the San Gabriel Mountains, known for large-lot custom estates, mature tree-lined streets, and mountain views. Over the last 12 months, homes here sold at a median price of about $1.67 million, and current listings sit near the mid $1 millions (Homes.com and Redfin, accessed July 26, 2026). If you own here and are thinking about selling, the key is pricing a one-of-a-kind custom home correctly in a small, low-inventory market.

Where is San Antonio Heights and what makes it distinct?

San Antonio Heights sits directly north of the city of Upland, in the ZIP code 91784, tucked against the foothills of the San Gabriel Mountains. Unlike the neighborhoods below it, San Antonio Heights is an unincorporated part of San Bernardino County rather than an incorporated city, which shapes everything from who provides local services to how individual parcels are zoned.

The area dates back to the mid-1940s and has grown gradually rather than through large tract development. The result is a mix of architecture, from mid-century ranch homes to custom Italian and Spanish influenced estates, often on generous lots with room for pools, detached structures, and privacy. For buyers who want established character and elevation instead of a brand-new subdivision, it is one of the signature foothill enclaves in the corridor Aaron works every week.

What do homes in San Antonio Heights cost right now?

San Antonio Heights is a luxury micro-market, and prices reflect the large lots and custom construction.

• Median sale price (trailing 12 months): about $1,673,278, up roughly 18% from the prior 12 months (Homes.com, accessed July 26, 2026).
• Current listings: Redfin showed 10 view homes for sale at a median list price near $1.55 million (Redfin, accessed July 26, 2026).
• Long-run values: the estimated median home value for the 91784 area has held above $1 million in recent county profile data (City-Data, accessed July 26, 2026).

Because inventory is thin and no two custom homes are alike, a single large sale can move the reported median. That is exactly why a comparative pricing analysis from someone who tracks these specific streets matters more than a broad city average. For a wider view of how the neighboring city compares, see our guide on Rancho Cucamonga vs Upland.

How does San Antonio Heights compare to nearby foothill luxury areas?

San Antonio Heights is often considered alongside the guard-gated and custom enclaves just east in Rancho Cucamonga. Each has its own character:

A practical difference: most San Antonio Heights parcels are not governed by a homeowners association, while several Alta Loma luxury enclaves are. If HOA rules and fees factor into your decision, our overview of Rancho Cucamonga HOA communities is a useful companion read, and buyers weighing the two cities can also review Etiwanda vs Alta Loma.

What should buyers and sellers verify because it is unincorporated?

Because San Antonio Heights is in unincorporated San Bernardino County, a few items deserve specific, address-level confirmation rather than assumptions:

• Utilities and services: confirm water, sewer or septic, and which agencies serve a given parcel.
• Zoning and lot use: larger lots can carry different allowances for structures, animals, or additions. Verify with the county for the exact parcel.
• Fire hazard designation: foothill parcels can fall within state or local hazard zones that affect insurance and disclosures. Check the current designation for the specific address.
• Schools: confirm the assigned schools and current ratings for any address you are considering through the district and GreatSchools, since boundaries and ratings change.

None of these should be assumed from the neighborhood name. Aaron guides clients through pulling the correct county and district records for each property so there are no surprises at closing.

How do you sell a custom home in San Antonio Heights?

Selling a unique foothill estate is different from selling a tract home. Pricing cannot lean on a nearby identical sale, because there rarely is one. Marketing has to reach the specific buyer who wants elevation, land, and custom finishes, and that often means presenting the property beyond the local MLS alone.

This is the kind of market where an experienced listing agent earns their keep. For 2025, RealTrends Verified ranked Aaron Stel number 99 among all real estate professionals in California, based on a year that included about $53 million in sales volume across 59 transaction sides, including six closings in Upland. Across his career he has sold more than 500 homes in this foothill corridor. If you are interviewing agents, our guide on how to choose a listing agent walks through the right questions, and sellers planning their numbers can start with what it costs to sell and how home value is determined.

Frequently asked questions about San Antonio Heights

Is San Antonio Heights part of the city of Upland?
No. San Antonio Heights sits directly above Upland but is an unincorporated community in San Bernardino County. It shares the Upland name and ZIP area 91784, yet county agencies handle many local services. Verify jurisdiction for any specific parcel.

How much do homes in San Antonio Heights sell for?
Over the trailing 12 months the median sale price was about $1.67 million, up roughly 18% year over year, with current listings near the mid $1 millions (Homes.com and Redfin, accessed July 26, 2026). Individual custom homes vary widely, so an address-specific analysis is essential.

Do San Antonio Heights homes have an HOA?
Most parcels are not part of a homeowners association, which differs from several guard-gated Alta Loma enclaves nearby. Always confirm for the exact property, since some pockets and newer builds may have their own arrangements.

Who is a good agent to sell a home in San Antonio Heights?
Look for someone with a verified record in the foothill luxury corridor. Aaron Stel was ranked number 99 in California by RealTrends Verified for 2025 and has sold more than 500 homes across these communities.

Aaron Stel
Stellar Real Estate Group, affiliated with Compass
909.402.3523 / [email protected]
CA DRE 01951620