20 Castle Court Hillsborough, CA $ 12,000,000
20 Castle Court
$ 12,000,000
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20 Castle Court

Hillsborough, CA, 94010
$ 12,000,000
Bedrooms7 Baths6.1 Sq 5,722

Monthly Estimate*

$ 75,769

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Single Family Home for sale in Hillsborough, CA

for $12,000,000 with 7 bedrooms and 6 full baths, 1 half bath. This 5,722 square foot home was built in 2026 on a lot size of 0.5002.

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.

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Single Family Active

Price

$ 12,000,000

Bedrooms

7

Full Bath

6

Half Bath

1

Property Type

Single Family

Taxes

$ 0

Style

Contemporary

Lot Size

0.5002

Year Built

2026

Town/City

Hillsborough

County/Region

San Mateo

MLS | Web ID

ML82059857

Features
General
Living Area 5722
Sewer Public Sewer
Heating Heat Pump
Cooling Central Air
Roof Metal
Appliances Dishwasher
Zoning R100
Garage Spaces 3
Architectural Style Contemporary
Year Built 2026
View Hills Water
Stories Count 2
Levels Two Story
Property Subtype Detached
County San Mateo
Property Type Residential
HOA false
Garage Y/N true
Green Energy Generation Solar
Full Baths 6
Status Active
City Hillsborough
High School District San Mateo Union High
MLS Area Listing
Lot Size Square Feet 21787
Standard Status Active
Elementary School District Hillsborough City Elementary
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Interior
Interior Amenities Family Room Formal Dining Room Pantry
Flooring Hardwood Wood
Fireplace Features Other
Air Conditioning Y/N true
Heating Y/N true
Fireplace Y/N true
Total Bedrooms 7
Kitchen Features Dishwasher Disposal Kitchen Island Pantry
Total Baths 7
1/2 Baths 1
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Exterior
Parking Features Attached
Water Source Public
Lot Size Area 21788.712
Building Area Total 5722
Lot Size Acres 0.5002
ADU Y/N true
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* Excluded Features
List By
Phil Chen

Listing Agent

Christie's International Real Estate Sereno

Broker

phil@sybariterealty.com

Email

Affordability Calculator

$75,769
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Monthly Principal & Interest
$75,769
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Default based on a 30-year fixed rate of 6.49% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.
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Nearby
0 Elementary School
0 Middle School
Unknown High School High School
Pricing History
DatePricePrice ChangeDescription
9/2/2026$12,000,000 Listed Price

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20 Castle Court, Hillsborough, CA, 94010 is a Single Family Home for sale at $12,000,000 with 5,722 sqft and a lot size of 0.5002. 20 Castle Court has 7 bedrooms, 6.1 baths, and was built in 2026. The property's zip code is 94010 which is in Hillsborough, CA