Listing provided courtesy of Phil Chen of Christie's International Real Estate Sereno. Last updated 2026-09-11 08:13:50.000000. Listing information © 2026 Sandicor.
Asking Price: $12,000,000 |
20 Castle, Hillsborough CA 94010
Community: 699 - Not Defined
This Single Family Residence property was built in 2026 and is priced at $12,000,000. Please see the additional details below.
Offered as a rare presale opportunity with the ability to personalize select finishes, this modern architectural masterpiece is estimated for completion in Q3 2027. Privately situated on a level half-acre cul-de-sac lot, the residence offers approximately 5,722 square feet of refined living space, including an attached JADU and detached ADU . A dramatic double-height foyer with a full-height porcelain slab feature wall and statement chandelier creates a striking first impression. Soaring ceilings, premium engineered oak flooring, a dramatic floating staircase, and walls of glass create a striking sense of scale and effortless indoor-outdoor living. The showpiece kitchen features custom European-inspired cabinetry with warm natural wood finishes, natural quartzite surfaces, a waterfall island, and premium Miele appliances. A private balcony, spa-inspired primary bath, custom wine display, Control4 automation, and beautifully landscaped grounds complete the residence. Buy early for preferred pricing and design personalization.





















