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Shawn Bengtson

Office Broker - DRE 01236964

  • Office 760-805-7199
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20 Castle Court, Hillsborough – $12,000,000

  • 7 Beds
  • 7 Baths
  • 5,722 Sqft
  • ½ Acres
  • 7 Beds
  • 7 Baths
  • 5,722 Sqft
  • ½ Acres

20 Castle Court

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.

Essential Information

  • MLS® #ML82059857
  • Price$12,000,000
  • Bedrooms7
  • Bathrooms7.00
  • Full Baths6
  • Half Baths1
  • Square Footage5,722
  • Acres0.50
  • Year Built2026
  • TypeResidential
  • Sub-TypeSingle Family Residence
  • StyleContemporary, Modern
  • StatusActive

Community Information

  • Address20 Castle Court
  • Area699 - Not Defined
  • CityHillsborough
  • CountySan Mateo
  • Zip Code94010

Amenities

  • UtilitiesNatural Gas Available
  • Parking Spaces3
  • ParkingGated
  • # of Garages3
  • GaragesGated
  • ViewHills, Neighborhood, Water
  • Has PoolYes
  • PoolIn Ground

Interior

  • InteriorWood
  • Interior FeaturesWalk-In Closet(s)
  • HeatingHeat Pump
  • CoolingCentral Air
  • FireplaceYes
  • # of Stories2

Appliances

Dishwasher, Freezer, Disposal, Refrigerator, Range Hood

Exterior

  • ExteriorConcrete, Steel
  • RoofMetal
  • ConstructionConcrete, Steel

School Information

  • DistrictOther
  • ElementaryOther
  • MiddleOther
  • HighBurlingame

Additional Information

  • Date ListedSeptember 2nd, 2026
  • Days on Market15
  • ZoningR10025

Listing Details

  • AgentPhil Chen

Office

Christie's International Real Estate Sereno

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Phil Chen, Christie's International Real Estate Sereno.

Based on information from California Regional Multiple Listing Service, Inc. as of September 18th, 2026 at 6:12pm PDT. This information is for your personal, non-commercial use and may not be used for any purpose other than to identify prospective properties you may be interested in purchasing. Display of MLS data is usually deemed reliable but is NOT guaranteed accurate by the MLS. Buyers are responsible for verifying the accuracy of all information and should investigate the data themselves or retain appropriate professionals. Information from sources other than the Listing Agent may have been included in the MLS data. Unless otherwise specified in writing, Broker/Agent has not and will not verify any information obtained from other sources. The Broker/Agent providing the information contained herein may or may not have been the Listing and/or Selling Agent.