4321 Edison Street San Mateo, CA $ 3,595,000
4321 Edison Street
$ 3,595,000
Recently Listed
Open House 10/9 5am - 6am
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4321 Edison Street

San Mateo, CA, 94403
$ 3,595,000
Bedrooms8 Baths9.0 Sq 3,839

Monthly Estimate*

$ 24,830

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Single Family Home for sale in San Mateo, CA

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

Single Family Active

Price

$ 3,595,000

Bedrooms

8

Full Bath

9

Property Type

Single Family

Taxes

$ 0

Style

Contemporary

Lot Size

0.218

Year Built

1949

Town/City

San Mateo

County/Region

San Mateo

MLS | Web ID

ML82063527

Features
General
Living 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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Interior
Interior 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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Exterior
Exterior 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 Features
List By
Patrick Lam

Listing Agent

Century 21 Masters

Broker

patricksold@gmail.com

Email

Affordability Calculator

$24,830
Per Month
100%
0%
0%
Monthly Principal & Interest
$24,830
Monthly Property Taxes
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Monthly Home Insurance
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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.
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Nearby
0 Elementary School
0 Middle School
Unknown High School High School
Pricing History
DatePricePrice ChangeDescription
10/4/2026$3,595,000 Listed Price

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4321 Edison Street, San Mateo, CA, 94403 is a Single Family Home for sale at $3,595,000 with 3,839 sqft and a lot size of 0.218. 4321 Edison Street has 8 bedrooms, 9.0 baths, and was built in 1949. The property's zip code is 94403 which is in San Mateo, CA