4321 Edison Street, San Mateo, CA 94403 (MLS # ML82063527)

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PRICE $3,595,000
BEDS 8
BATHS 9
HOME SIZE 3,839 sqft
LOT SIZE 9,497 sqft
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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!

LAST UPDATED 10/3/2026 YEAR BUILT 1949
GARAGE SPACES 2.0 COUNTY San Mateo
STATUS Active PROPERTY TYPE(S) Single Family


ADDITIONAL DETAILS
AIR Zoned
AIR CONDITIONING Yes
APPLIANCES Dishwasher, Disposal, Dryer, Electric Range, Microwave, Range Hood, Refrigerator, Washer
CONSTRUCTION Stone
EXTERIOR Balcony
FIREPLACE Yes
GARAGE Attached Garage, Yes
HEAT Central, Forced Air, Heat Pump, Zoned
INTERIOR Breakfast Bar, Master Downstairs
LOT 9496 sq ft
LOT DESCRIPTION Back Yard, Sloped, Sloped Down, Views
LOT DIMENSIONS 9496.00
PARKING Attached, Enclosed, Oversized
POOL DESCRIPTION None
SEWER Public Sewer
STORIES 1
STYLE Contemporary, Modern / High Tech
UTILITIES Natural Gas Available
VIEW Yes
VIEW DESCRIPTION Bay, Mountain(s), City Lights
WATER Public
ZONING R10006
Listed by Patrick Lam | 415-710-3704, CENTURY 21 Masters

The data relating to real estate for sale on this website comes in part from the Internet Data Exchange program of the MLSListings™ MLS system. All real estate listings in the MLSListings MLS system are marked with the MLSListings Internet Data Exchange icon (a stylized house inside a circle), and detailed information about them includes the names of the listing brokers and listing agents.

 

Based on information from MLSListings MLS as of 10/4/26 5:42 PM PDT. 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.

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This IDX solution is (c) Diverse Solutions 2026.


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