Properties like this don't come to market often and when they do, they don't stay. Commanding over a full acre on the coveted slopes of Mt. Helix, 10880 Hess Drive is a rare estate-caliber offering that combines the privacy and scale of country living with the convenience of one of San Diego's most prestigious addresses. What sets this property apart before you even step inside: three separate additional structures a private guest house, maid's quarters, and a multi-person home office none of which are included in the listed square footage. These aren't theoretical possibilities or future conversion projects. They are established, fully functioning spaces that have been in active use for over 25 years. The infrastructure, the utility, and the livability are already proven. For buyers seeking multi-generational living, dedicated workspace, or private accommodations for extended family or staff, this level of turnkey flexibility is exceptionally rare at any price point in the Mt. Helix corridor. The main residence delivers 3,461 square feet across 4 generously sized bedrooms and 4 full bathrooms built for the way today's buyers actually live: spaciously, flexibly, and with room for everyone. Whether you're a growing family seeking room to spread out, a multi-generational household needing independent living zones, or a move-up buyer who has simply outgrown what the market typically offers, this home delivers on every level. Step outside and the scale of the opportunity becomes immediately clear. The expansive 1.16-acre lot provides a level of privacy, breathing room, and