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$3,595,000

4321 Edison Street, San Mateo, CA 94403

220% above the San Mateo median of $1.1M (98 active listings)

38% of San Mateo listings have cut their price · half have been listed 30+ days

8beds
9baths
3,839sqft
$936/sqft

Open Houses

Sun, Oct 4·2:00 PM – 4:00 PM
Tue, Oct 6·5:00 PM – 6:00 PM
Thu, Oct 15·5:00 PM – 6:00 PM
Sat, Oct 10·2:00 PM – 4:00 PM
Sun, Oct 11·2:00 PM – 4:00 PM

Stop by during open house hours — no appointment needed.

About this home

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!

Property details

Property type
Single Family
Year built
1949
Lot size
9,496 sqft
Garage spaces
2
Parking spaces
10
Stories
1
View
Bay,Mountains,City Lights
County
San Mateo
Listed
today
MLS #
82063527
Listed by
Patrick Lam · CENTURY 21 Masters

Features

  • Attached Garage
  • Enclosed
  • Parking Area
  • Room for Oversized Vehicle
  • Central Forced Air
  • Heat Pump
  • Heating - 2+ Zones
  • Multi-Zone
  • Fireplace: Dual See Thru
  • Fireplace: Living Room
  • Fireplace: Other
  • Flooring: Hardwood
  • Flooring: Tile
  • Flooring: Vinyl / Linoleum
  • Roof: Flat / Low Pitch
  • Roof: Shingle
  • Construction: Stone
  • Construction: Wood
  • Skylight
  • Closed Circuit Monitoring (24-hour)
  • Thermostat Controller
  • Double Pane Windows
  • Lot: Grade - Sloped Down
  • Lot: Views
  • Utilities: Individual Electric Meters
  • Utilities: Individual Gas Meters
  • Utilities: Public Utilities
  • Utilities: Natural Gas
  • Sewer: Sewer - Public
  • Water: Public
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Location

Approximate location based on the listing address.

Copyright 2026 MLSListings Inc. Based on information from MLSListings MLS as of 10/4/2026. 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. MLS Listing #82063527. Listing courtesy of CENTURY 21 Masters.