REQUEST A TOUR If you would like to see this home without being there in person, select the "Virtual Tour" option and your agent will contact you to discuss available opportunities.

In-PersonVirtual Tour

Debbi DiMaggio Betta

debbi.dimaggio@corcoranicon.com +1(510) 414-6777

$ 4,498,000

Est. payment | -/mo

3 Beds

2 Baths

2,190 SqFt

Save Virtual Tour

$ 4,498,000

Est. payment | -/mo

Save Virtual Tour

3 Beds

2 Baths

2,190 SqFt

Key Details

Property Type Single Family Home

Sub Type Single Family Residence

Listing Status Active

Purchase Type For Sale

Square Footage 2,190 sqft

Price per Sqft $2,053

MLS Listing ID ML82039557

Bedrooms 3

Full Baths 2

HOA Y/N No

Year Built 1956

Lot Size 8,803 Sqft

Acres 0.2021

Property Sub-Type Single Family Residence

Property Description

A rare architectural offering, this one-of-a-kind 1956 Mid-Century Modern X-100 prototype, designed by an acclaimed team of architects, represents a pivotal moment in mid-century modern design. The home showcases six exposed steel I-beams, eliminating interior load-bearing walls and creating a dramatic open, light-filled environment with seamless indoor-outdoor flow. Thoughtfully restored while honoring its original vision, recent updates include fresh interior/exterior paint, recoated foam roof, refinished vinyl and concrete floors, updated radiant heating, curated furnishings, and refreshed landscaping. The home is organized around two private garden atriums with in-ground planting beds, while 32 feet of skylights flood the interiors with natural light. Signature materials, steel, glass, and Formica, highlight the home's authentic modernist character. Built-ins and kitchen elements are fully integrated into the architecture. Debuted in 1956, the X-100 gained national attention and influenced generations of modern residential design, set against the backdrop of Crystal Springs Reservoir. Listed on the National Register, this is a true collector-grade property ideal for design enthusiasts, historians, and those seeking a singular living experience.

Location

State CA

County San Mateo

Zoning R100

Interior

Interior Features Dining Area, Storage, Breakfast Bar, Smart Thermostat

Heating Natural Gas, Radiant

Cooling None

Flooring Tile

Fireplaces Number 1

Fireplaces Type Free Standing, Living Room, Wood Burning

Fireplace Yes

Appliance Dishwasher, Double Oven, Plumbed For Ice Maker, Oven

Laundry Dryer, Washer

Exterior

Exterior Feature Back Yard

View Y/N true

View Hills, Mountain(s)

Private Pool true

Building

Story 1

Foundation Slab

Sewer Public Sewer

Water Public

Architectural Style Contemporary

Level or Stories One Story

New Construction No

Schools

School District San Mateo Union High

Others

Tax ID 041044030

Virtual Tour https://www.eichlerx-100.com

© 2026 BEAR, CCAR, bridgeMLS. This information is deemed reliable but not verified or guaranteed. This information is being provided by the Bay East MLS or Contra Costa MLS or bridgeMLS. The listings presented here may or may not be listed by the Broker/Agent operating this website.

Listed by Compass

Nearby Locations

GET MORE INFORMATION

Debbi DiMaggio Betta

REALTOR | Partner | Lic# 01047447

debbi.dimaggio@corcoranicon.com

+1(510) 414-6777

342 Highland Ave, Piedmont, CA, 94611, USA

1586 Lexington Avenue San Mateo, CA 94402

Debbi DiMaggio Betta

Key Details

Location

Interior

Exterior

Building

Schools

Others

1586 Lexington Avenue