20 Castle CT Hillsborough CA 94010 | MLS #ML82059857
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.
Property Details
Price:
$12,000,000
MLS #:
ML82059857
Status:
Active
Beds:
7
Baths:
7
Type:
Single Family
Subtype:
Single Family Residence
Neighborhood:
699notdefined
Listed Date:
Sep 3, 2026
Finished Sq Ft:
5,722
Lot Size:
21,787 sqft / 0.50 acres (approx)
Year Built:
2026
See this Listing
Schools
School District:
Other
Elementary School:
Other
Middle School:
Other
High School:
Burlingame
Interior
Appliances
DW, FZ, GD, RF, HOD
Bathrooms
6 Full Bathrooms, 1 Half Bathroom
Cooling
CA
Flooring
WOOD
Heating
HP
Exterior
Architectural Style
CNT, MOD
Attached Garage YN
1
Common Walls
NCW
Construction Materials
STL, CON
Garage Spaces
3
Parking Spots
3
Parking Total
3
Roof
MTL
Spa Features
IG
View
HI, WA, NE
Financial
Map
Community
- Address20 Castle CT Hillsborough CA
- CityHillsborough
- CountySan Mateo
- Zip Code94010
Market Summary
Current real estate data for Single Family in Hillsborough as of Sep 07, 2026
20
Single Family Listed
135
Avg DOM
1,621
Avg $ / SqFt
$11,422,500
Avg List Price
Property Summary
- 20 Castle CT Hillsborough CA is a Single Family for sale in Hillsborough, CA, 94010. It is listed for $12,000,000 and features 7 beds, 7 baths, and has approximately 5,722 square feet of living space, and was originally constructed in 2026. The current price per square foot is $2,097. The average price per square foot for Single Family listings in Hillsborough is $1,621. The average listing price for Single Family in Hillsborough is $11,422,500. To schedule a showing of MLS#ml82059857 at 20 Castle CT in Hillsborough, CA, contact your The Knight Group LA agent at 310.409.7242.
Similar Listings Nearby
Courtesy of Christie’s International Real Estate Sereno. Disclaimer: All data relating to real estate for sale on this page comes from the Broker Reciprocity (BR) of the California Regional Multiple Listing Service. Detailed information about real estate listings held by brokerage firms other than The Knight Group LA include the name of the listing broker. Neither the listing company nor The Knight Group LA shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. The Broker providing this data believes it to be correct, but advises interested parties to confirm any item before relying on it in a purchase decision. Copyright 2026. California Regional Multiple Listing Service. All rights reserved.20 Castle CT
Hillsborough, CA
