20 Castle Court, Hillsborough, CA 94010 (MLS # ML82059857)

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PRICE $12,000,000
BEDS 7
BATHS 6.5
HOME SIZE 5,722 sqft
LOT SIZE 21,789 sqft
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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 Thermador 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.

LAST UPDATED 9/2/2026 YEAR BUILT 2026
GARAGE SPACES 3.0 COUNTY San Mateo
STATUS Active PROPERTY TYPE(S) Single Family

SCHOOLS
Elementary School West Hillsborough
Jr. High School Crocker Middle
High School Burlingame High


ADDITIONAL DETAILS
AIR Central Air
AIR CONDITIONING Yes
APPLIANCES Dishwasher, Disposal, Freezer, Range Hood, Refrigerator, Wine Refrigerator
BASEMENT Crawl Space
CONSTRUCTION Concrete, Frame, Metal Siding
FIREPLACE Yes
GARAGE Attached Garage, Yes
HEAT Heat Pump
INTERIOR Double Vanity, High Ceilings, Kitchen Island, Pantry, Vaulted Ceiling(s), Walk-In Closet(s)
LOT 0.5002 acre(s)
LOT DIMENSIONS 21787.00
PARKING Attached, Garage Door Opener
POOL DESCRIPTION Pool/Spa Combo, In Ground
SEWER Public Sewer
STORIES 2
STYLE Contemporary, Modern / High Tech
UTILITIES Natural Gas Available
VIEW Yes
VIEW DESCRIPTION Hills, Neighborhood, Water
WATER Public
ZONING R10025
Listed by Phil Chen | 415-271-1920, Christie's International Real Estate Sereno

The data relating to real estate for sale on this website comes in part from the Internet Data Exchange program of the MLSListings™ MLS system. All real estate listings in the MLSListings MLS system are marked with the MLSListings Internet Data Exchange icon (a stylized house inside a circle), and detailed information about them includes the names of the listing brokers and listing agents.

 

Based on information from MLSListings MLS as of 9/5/26 9:31 AM PDT. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by broker or MLS. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.

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This IDX solution is (c) Diverse Solutions 2026.


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