Recently Listed Open House 10/9 5am - 6am
4321 Edison Street
San Mateo, CA, 94403 $ 3,595,000
Bedrooms8 Baths9.0 Sq 3,839 Monthly Estimate*
$ 24,830
for $3,595,000 with 8 bedrooms and 9 full baths. This 3,839 square foot home was built in 1949 on a lot size of 0.218.
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!
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Open House
10/9/2026 5:00 AM - 6:00 AM
10/10/2026 2:00 PM - 4:00 PM
10/11/2026 2:00 PM - 4:00 PM
4321 Edison Street San Mateo, CA
* Some states or local ordinances may prohibit Open Houses at this time, please confirm with your Weichert agent or local rep to confirm
FeaturesGeneralLiving Area 3839
Sewer Public Sewer
Heating Forced Air Zoned Heat Pump
Appliances Dishwasher Microwave
Zoning R100
Garage Spaces 2
Architectural Style Contemporary
Construction Materials Stone
Year Built 1949
Electric 220 Volts in Kitchen
View Bay City Lights Mountain(s)
Stories Count 1
Levels One Story
Property Subtype Detached
County San Mateo
Property Type Residential
HOA false
Garage Y/N true
Full Baths 9
Status Active
City San Mateo
High School District San Mateo Union High
MLS Area Listing
Lot Size Square Feet 9496
Standard Status Active
Elementary School District San Mateo-Foster City Elementary
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InteriorInterior Amenities Dining Area Family Room Breakfast Bar Smart Thermostat
Flooring Hardwood Tile
Total Fireplaces 1
Fireplace Features Living Room Other
Heating Y/N true
Window Features Double Pane Windows
Fireplace Y/N true
Laundry Features Dryer Washer
Total Bedrooms 8
Kitchen Features 220 Volt Outlet Breakfast Bar Dishwasher Disposal Microwave
Total Baths 9
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ExteriorExterior Amenities Back Yard
Fencing Fenced
Parking Features Attached Enclosed Parking Lot
Water Source Public
Lot Size Area 9496.08
Building Area Total 3839
Lot Size Acres 0.218
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* Excluded FeaturesList Bypatricksold@gmail.comEmail
Affordability Calculator
- Monthly Principal & Interest
- $24,830
- Monthly Property Taxes
- --
- Monthly Home Insurance
- --
Default based on a 30-year fixed rate of 7.375% 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 San Mateo, CA
Average List Price $2,537,555
Percent of Sale Price 29%
About San Mateo, CA 105,907 Population
14% Since 2002
$ 102,688 Median Income
41.09 Median Age
27% Households with Children
Trends Information provided by ATTOM Data Solutions.
0 Elementary School
0 Middle School
Unknown High School High School
Pricing History| Date | Price | Price Change | Description |
|---|
| 10/4/2026 | $3,595,000 | | Listed Price |