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20 Castle Court, Hillsborough CA 94010
20 Castle Court, Hillsborough CA 94010
California>Hillsborough>Carolands

20 Castle CourtHillsborough, CA 94010

For Sale

$12,000,000

Smart Buyer Rebate $120,000

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.

Listed by Phil Chen

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License #01715177

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Christie's International Real Estate Sereno

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415-271-1920

Listed by Axis Elite Team

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License #70010248

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Christie's International Real Estate Sereno

Last updated September 10, 2026

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Source: MLSListings #ML82059857

Listing Facts

  • TypeSingle-family
  • NeighborhoodCarolands
  • Bedrooms7
  • Days on Prevu14
  • Size5,722 sqft
  • Price per sqft$2,097

Amenities

  • Dishwasher
  • Pets Allowed
  • Parking
  • Swimming Pool

Location

Mortgage Calculator

Listing History

09/02/2026
Listed by Christie's International Real Estate Sereno
$12,000,000
  1. 09/02/2026$12,000,000
    Listed by Christie's International Real Estate Sereno

Property Details for 20 Castle Court

Exterior

Construction

  • New Construction: Yes
  • Roof: Metal
  • Stories: 2
  • Year Built: 2026
  • Year Built Details: 6
  • Architectural Style: Contemporary, Modern/High Tech
  • Construction Materials: Concrete

Features

  • Other Structures: Other
  • Pool Features: In Ground, Pool/Spa Combo
  • View: Hills, Water

Measurements

  • Building Area Total: 5,722
  • Lot Size Acres: 0.50
  • Lot Size Area: 21,787
  • Lot Size Source: Assessor
  • Lot Size Square Feet: 21,787
  • Lot Size Units: Square Feet

Financial

Taxes

  • Parcel Number: 030-061-080

Interior

Features

  • Appliances: Dishwasher, Freezer, Garbage Disposal, Hood Over Range, Refrigerator, Wine Refrigerator
  • Fireplace Features: Other
  • Flooring: Hardwood, Wood
  • Interior Features: High Ceiling, Vaulted Ceiling, Walk-in Closet
  • Spa Features: Pool/Spa Combo

Measurements

  • Living Area: 5,722

Rooms

  • Bathrooms Full: 6
  • Bathrooms Half: 1
  • Bedrooms Total: 7

Parking

Parking

  • Attached Garage: Yes
  • Garage Spaces: 3
  • Garage: Yes
  • Parking Features: Attached Garage, Gate/Door Opener

Schools

Elementary School

  • Elementary School: West Hillsborough
  • Elementary School District: Hillsborough City Elementary

High School

  • High School: Burlingame High
  • High School District: San Mateo Union High

Middle or Junior School

  • Middle Or Junior School: Crocker Middle

Utilities

Equipment

  • Cooling: Central Forced Air
  • Heating: Heat Pump
  • Laundry Features: Tub / Sink, Inside
  • Sewer: Public Sewer
  • Utilities: Natural Gas Available, Public Utilities, Water - Public, Solar
  • Water Source: Public

Frequently Asked Questions

How many bedrooms does this single-family home have?

There are 7 bedrooms in this single-family home at 20 Castle Court.

What schools are nearby to 20 Castle Court?

Nearby schools include the West Hillsborough Elementary School, Crocker Middle, and Burlingame High.

Does this single-family home have parking?

Yes, there are 3 parking spaces available for 20 Castle Court.

How does 20 Castle Court compare to other single-family homes in Carolands?

This single-family home is listed 29% below the average price for single-family homes in Carolands and has been on the market for 343 less days than the typical home in this area.

What is the square footage on this single-family home?

According to the MLS, this listing is 5,722 sqft.

20 Castle Court is a 7-bedroom single-family home for sale in Hillsborough CA 94010. Listed on Prevu for 14 days at $12,000,000. This home features 5,722 square feet of living space, located in Hillsborough. The median listing price for single-family homes in this area is $14,980,000. Nearby schools include West Hillsborough Elementary School, Crocker Middle, and Burlingame High. Property amenities include dishwasher, pets allowed, parking, and swimming pool. View other single-family home listings in Hillsborough.

The data relating to real estate for sale on this display comes in part from the Internet Data Exchange program of the MLSListings™️ MLS system. Real estate listings held by brokerage firms other than Prevu Real Estate are marked with the Internet Data Exchange and detailed information about them includes the names of the listing brokers and listing agents. Based on information from the MLSListings MLS) as of 09/10/2026. 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. Data Services by Constellation Data Labs. IDX display powered by Prevu Real Estate. Copyright 2026 MLSListings Inc. All rights reserved.

Full MLS Disclaimers

Rebate estimate is indicative only and based on listing price and estimated buyer's agent commission paid by owner, if applicable. Final rebates are subject to Terms of Use and may vary due to final negotiated transaction terms.