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Listed by Christie's International Real Estate Sereno, Phil Chen, Axis Elite Team Listing Contact: 415-271-1920
7 Beds
7 Baths
5,722 sqft

$12,000,000

20 Castle CT, Hillsborough CA, 94010

Price per sqft$2,097.17
Built in2026
Property size5,722 sqft
Property typeResidential

Overview

Active

Listed Sep 2, 2026

Updated 4 days ago

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.

$79,836/mo

Est. mortgage payment based on a $12,000,000 home price.

All estimates are provided by Luxury Presence for informational purposes only. Actual amounts may vary.

Additional information

MLS® ID
ML82059857

Interior Features

Bedrooms
7
Bathrooms
7
Fireplace
Yes
Cooling
Yes
Heating
Yes
Basement
No

Exterior Features

Lot Size
0.5 Acres

Other Property Details

Garage
Yes
View
Yes
New Construction
Yes
Pool
Yes
MLS provider logo

Listed by Christie's International Real Estate Sereno, Phil Chen DRE:01715177, Axis Elite Team
Listing Contact: 415-271-1920 

All information deemed reliable but not guaranteed and should be independently verified. All properties are subject to prior sale, change or withdrawal. Neither listing broker(s) nor The Laugesen Team | CA DRE# 01011089 shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless.

The data relating to real estate for sale on this website comes in part from the Internet Data Exchange program of the MLS Listings, Inc. MLS system. Real estate listings held by brokerage firms other than The Laugesen Team | CA DRE# 01011089 are marked with the 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.

Data Services by Constellation Data Labs. ©2026 MLS Listings, Inc. All rights reserved. 2026

Data last updated 4:00 AM UTC, 9/11/2026

 

 

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