20 Castle

Hillsborough, CA, 94010
For Sale $12,000,000
  • 7beds
  • 5,722sqft
  • 21,787sf lot
Listing agent:
Christie's International Real Estate Sereno
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.

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20 Castle is a Residential Single Family Residence property located in Hillsborough, California, featuring a 21,787 sqft lot, 5,722 sqft, 7 bedrooms, MLS #ML82059857.
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Data last modified: 2026-09-10 19:16:30