4321 Edison Street, San Mateo, CA 94403 (MLS # ML82063527)
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Sophisticated modern living in desirable Westwood Knolls! 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 deck, ideal for extended famil/flexible living. 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!
| DAYS ON MARKET | 1 | LAST UPDATED | 10/3/2026 |
|---|---|---|---|
| YEAR BUILT | 1949 | COMMUNITY | 699 - Not Defined |
| GARAGE SPACES | 2.0 | COUNTY | San Mateo |
| STATUS | Active | PROPERTY TYPE(S) | Single Family |
| ADDITIONAL DETAILS | |
| AIR CONDITIONING | Yes |
|---|---|
| APPLIANCES | Dishwasher, Disposal, Dryer, Microwave, Range Hood, Refrigerator, Washer |
| AREA | 699 - Not Defined |
| CONSTRUCTION | Stone |
| FIREPLACE | Yes |
| GARAGE | Attached Garage, Yes |
| HEAT | Central, Heat Pump |
| INTERIOR | Breakfast Bar |
| LOT | 9496 sq ft |
| LOT DESCRIPTION | Sloped Down |
| LOT DIMENSIONS | 9496 |
| PARKING | Attached |
| SEWER | Public Sewer |
| STORIES | 1 |
| STYLE | Contemporary, Modern |
| UTILITIES | Natural Gas Available |
| VIEW | Yes |
| VIEW DESCRIPTION | Bay, City Lights, Mountain(s) |
| WATER | Public |
TOTAL MONTHLY PAYMENT
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