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Listed by: Patrick Lam (415) 710-3704 DRE #01764668 | CENTURY 21 Masters (650) 689-5888
$3,595,000
Monthly Est:$17,894
8 Beds
- 9 Baths
9 full baths
3,839sqft
4321 Edison St, San Mateo, CA 94403
$3,595,000
$17,894/moEst:
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Single Family Residence
Built in 1949
$-- HOA
9,496 sqft lot
$936/sq.ft
Description
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!
- Houzeo last checked: 12 hours ago
- Listing updated: October 4, 2026 at 4:21 am
- Source: California Regional MLS-CA | MLS#: ML82063527

Property Details
Status
Active
Type
Single Family Residence
No. of Stories
1
County
City
Neighborhood
--
Year Built
1949
HOA Fees
-
Finished Area
3,839 sqft
Lot Size
9,496 sqft lot
Basement Area
- sqft
MLS Name
California Regional MLS
MLS Number
ML82063527
MLS Status
Active
Days on Market
1
Open House

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Location
Facts & Features
Rooms
Bedrooms & bathrooms
Bedrooms: 8
Bathrooms: 9
Interior
Heating
Central, Heat Pump
Sewer
Public Sewer
Interior Features
Breakfast Bar
Flooring
Tile, Wood
Window Features
Skylights
Appliances
Dishwasher, Disposal, Microwave, Refrigerator, Range Hood, Dryer, Washer
Construction
Year Built
Year Built: 1949
Home type
Single Family Residence
Construction Materials
Stone
Roof
Flat, Shingle
Architectural Style
Contemporary, Modern
Utilities & Energy
Utilities
Natural Gas Available
Laundry Features
Gas Dryer Hookup
Fireplace Features
Living Room
Water Source
Public
Other Features
Lot Features
Sloped Down
Patio And Porch Features
Deck
Price History
| Date | Event | Price |
|---|---|---|
10/03/2026 Source: | Listed for Sale | $3,595,000 +162.41% $936/sqft |
12/07/2017 Source: | Price Increased | $1,370,000 +14.17% $357/sqft |
12/07/2017 Source: | Sold | $1,199,950 $313/sqft |
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Based on information from California Regional Multiple Listing Service, Inc. as of Oct 02, 2026, 09:00AM 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. Information being provided is for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. This website may not include listings or property addresses of sellers who have directed their listing brokers to withhold their listing or their property address from display on the Internet. © 2026 California Regional Multiple Listing Service. All Rights Reserved.
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