1390 Westridge Drive
Portola Valley, CA, 94028 $ 8,500,000
Bedrooms5 Baths4.1 Sq 3,520 Monthly Estimate*
$ 52,336
Listed by Coldwell Banker Realty
for $8,500,000 with 5 bedrooms and 4 full baths, 1 half bath. This 3,520 square foot home was built in 1964 on a lot size of 1.1792.
Contemporary single-level main residence with attached two-story ADU on 1.1+ private acres finished in 2021, offering direct Windy Hill views and walking distance to Portola Valley Town Center, library, restaurants, farmers market, and trailheads. Striking modern architecture features walls of glass, soaring ceilings, skylights, and white oak floors throughout. The dramatic great room opens to covered and open terraces and a level lawn just off the living room patio, with rear grounds anchored by a heritage oak. The designer kitchen showcases Calacatta marble surfaces, a waterfall island, and high-end appliances. The main residence includes a dedicated office, four bedrooms, and three and a half baths, highlighted by a serene primary suite with Windy Hill views and a Zen-inspired bath with private garden. A privately located bedroom suite is ideal for guests or an au pair. The attached ADU offers one bedroom, one bath, a full kitchen, and a living room with fireplace, with finishes matching the main home. Gated entry, custom pavers, cedar entry door, fountains, mature landscaping, level synthetic lawn, raised garden beds, and fully fenced grounds complete this rare blend of architectural sophistication, privacy, walkable convenience, and iconic hillside scenery.
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FeaturesGeneralLiving Area 3520
Sewer Septic Tank
Heating Forced Air
Cooling Central Air
Roof Metal
Appliances Double Oven Dishwasher Freezer Disposal Microwave Refrigerator Range Hood Vented Exhaust Fan Dryer Washer
Zoning R1001A
Garage Spaces 2
Architectural Style Contemporary
Year Built 1964
View Hills
Property Subtype Single Family Residence
County San Mateo
New Construction false
Property Type Residential
HOA false
Attached Garage true
Garage Y/N true
Full Baths 4
Special Listing Conditions Standard
Status Active
Directions Cross Street: Portola Road
City Portola Valley
High School District Other
MLS Area 699 - Not Defined
Lot Size Units Square Feet
Lot Size Square Feet 51365
Carport Spaces 2
Carport Y/N true
Property Attached Y/N false
Standard Status Active
Year Built Source Assessor
Property Sub Type Additional Single Family Residence
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InteriorInterior Amenities Atrium Walk-In Closet(s)
Flooring Tile Wood
Fireplace Features Living Room
Total Stories 1
Common Walls No Common Walls
Air Conditioning Y/N true
Heating Y/N true
Window Features Skylight(s)
Fireplace Y/N true
Half Baths 1
Total Bedrooms 5
Total Baths 5
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ExteriorParking Features Carport
Water Source Public
Total Parking 4
Lot Size Area 51365
Foundation Details Block Concrete Perimeter
Lot Size Acres 1.1792
Lot Size Source Assessor
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* Excluded FeaturesList ByColdwell Banker RealtyBroker
hcornish@cbnorcal.comEmail
Affordability Calculator
- Monthly Principal & Interest
- $52,336
- Monthly Property Taxes
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- Monthly Home Insurance
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Default based on a 30-year fixed rate of 6.25% 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.
Learn more about how to save NearbySingle family listings in Portola Valley, CA
Average List Price $4,726,890
Percent of Sale Price 44%
About Portola Valley, CA 4,610 Population
2% Since 2002
$ 202,393 Median Income
54.01 Median Age
22% Households with Children
Trends Information provided by ATTOM Data Solutions.
4827338 Elementary School
4827337 Middle School
Unknown High School High School
Pricing History| Date | Price | Price Change | Description |
|---|
| 2/2/2026 | $8,500,000 | | Listed Price |