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Perched high on Alta Loma Drive in eastern San Diego County, The Boulder House is a forward-thinking green home and a rare creation by Hubbell & Hubbell, the acclaimed father-and-son team of the late celebrated artist James Hubbell and his son, architect Drew Hubbell. Recognized with architectural honors and featured in multiple publications, including The Los Angeles Times, this residence stands as both a work of art and a pioneering model of sustainable living. Blending artistry with innovation, the home features new ceramic tile floors, custom tile work, vaulted ceilings, and arched windows that flood the open layout with natural light. At its heart, the residence is literally built around a 14-foot natural boulder, a dramatic centerpiece in the great room that cools and humidifies in summer and radiates warmth in winter. Above, a central tower fan enhances airflow, drawing heat up and out in warmer months and recirculating warmth in cooler seasons. Roof overhangs and arched arcades minimize solar gain while honoring California's historic mission style. Super-insulated straw bale walls act like a thermos, keeping interiors comfortable year-round while exceeding California's Title 24 standards by 41 percent. Recent upgrades include a newly re-plastered pool, freshly recoated exterior limestone, a new high-efficiency tankless water heater, and a water softener. Privately set against protected land and a wildlife sanctuary, the property offers unmatched seclusion, sweeping mountain views, and timeless architectural design.
Property Type(s):
Single Family
| Last Updated | 9/10/2025 | Tract | San Diego |
|---|---|---|---|
| Year Built | 2000 | Community | 91935 - Jamul |
| County | San Diego |
Additional Details
| AIR | Whole House Fan |
|---|---|
| AIR CONDITIONING | Yes |
| APPLIANCES | Dishwasher, Disposal, Gas Cooktop, Oven, Propane Cooktop, Range, Tankless Water Heater |
| AREA | 91935 - Jamul |
| FIREPLACE | Yes |
| HEAT | Fireplace Insert, Fireplace(s), See Remarks |
| INTERIOR | Pantry, Walk-In Closet(s) |
| LOT | 1.42 acre(s) |
| PARKING | Asphalt, Driveway, Other |
| POOL | Yes |
| POOL DESCRIPTION | Private, Heated |
| STORIES | 1 |
| SUBDIVISION | San Diego |
| VIEW | Yes |
| VIEW DESCRIPTION | City Lights, Mountain(s), Panoramic, Trees/Woods |
| WATER | Well |
Location
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Listed with The Agency
The information being provided by Conejo Simi Moorpark Association of REALTORS® (“CSMAR”) is for the visitor's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties visitor may be interested in purchasing. Any information relating to a property referenced on this web site comes from the Internet Data Exchange (“IDX”) program of CSMAR. This web site may reference real estate listing(s) held by a brokerage firm other than the broker and/or agent who owns this web site. Any information relating to a property, regardless of source, including but not limited to square footages and lot sizes, is deemed reliable but not guaranteed and should be personally verified through personal inspection by and/or with the appropriate professionals. The data contained herein is copyrighted by CSMAR and is protected by all applicable copyright laws. Any dissemination of this information is in violation of copyright laws and is strictly prohibited.
This IDX solution is (c) Diverse Solutions 2025.
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