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$3,595,000
Active4321 Edison Street
San Mateo, CA 94403
Sophisticated modern living in desirable Westwood Knolls! Situated on a quiet cul-de-sac, extensively renovated and expanded, this exceptional residence offers approx. 3,839 sq. ft. of living space with 8BD/9BA, including a newly constructed two-story rear extension, on an expansive 9,496 sq. ft. lot. The main residence features dramatic 12-ft ceilings, White Oak hardwood floors, an electric fireplace, and accordion glass doors opening to a view deck with breathtaking city and Bay views. The chefs kitchen showcases a waterfall island, quartz countertops, sleek cabinetry, and high-end Thermador appliances, including a built-in wine refrigerator. The main level offers 5BD/6BA, including 4 en-suites, plus a sunroom and family room with fireplace and wet bar. Additional highlights include multi-zone A/C and heating, ceiling speakers, and 3 decks. The downstairs legal ADU (4321A Edison St) offers separate entrance, 3BD/3BA, including 2 en-suites, an open living area, kitchen with eat-in island, sunroom, and a spacious deck. 2-car garage, tankless water heaters, plus an oversized lot with parking for 10+ vehicles, RV, & boat/trailer. Conveniently located near Hillsdale shopping, dining, Caltrain, and major freeways. A rare combination of space, views, modern luxury, and versatility!
Open Houses
- Sat, Oct 10 · 9:00 PM – 11:00 PM
- Sun, Oct 11 · 9:00 PM – 11:00 PM
- Fri, Oct 16 · 12:00 AM – 1:00 AM
Property Details
- Interior
- Breakfast Bar
- Cooling
- 1
- Heating
- Central, Heat Pump
- Bedrooms
- 8
- Bathrooms
- 9.0
- Full Baths
- 9
- View
- Bay,City Lights,Mountains
- Lot Features
- Sloped Down
- Stories
- 1
- Lot Description
- Sloped Down
- Acres
- 0.218
- Square Feet
- 3839.0
- Lot Size (sqft)
- 9496.0
- Parking
- 1
- Parking Spaces
- 2
- Parking Type
- Garage
- Parking Garage Spaces
- 2.0
- Property Type
- Purchase
- Style
- Contemporary, Modern
- Property Subtype Additional
- Single Family Residence
- Year Built
- 1949
- Roof
- Flat, Shingle
- Sewer Information
- Public Sewer
- Utility Source
- Public
- Utility Features
- Natural Gas Available
- Appliances
- Dishwasher, Disposal, Microwave, Refrigerator, Range Hood, Dryer, Washer
- School District
- Other
- County
- San Mateo
- Region
- San Mateo
- Zoning
- R10006
- Original List Price
- $3,595,000
- MLS #
- ML82063527
Location
Legal
The multiple listing data appearing on this website, or contained in reports produced therefrom, is owned and copyrighted by California Regional Multiple Listing Service, Inc. ("CRMLS") and is protected by all applicable copyright laws. Information provided is for viewer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties the viewer may be interested in purchasing. All listing data, including but not limited to square footage and lot size is believed to be accurate, but the listing Agent, listing Broker and CRMLS and its affiliates do not warrant or guarantee such accuracy. The viewer should independently verify the listed data prior to making any decisions based on such information by personal inspection and/or contacting a real estate professional.
Based on information from California Regional Multiple Listing Service, Inc. as of the most recent time synced and /or other sources. 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
Last Updated: Oct 9, 2026 11:24 PM. Source: CRMLS
Listing Broker: CENTURY 21 Masters; Patrick Lam; patricksold@gmail.com

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