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20401 Blue Mountain Drive, Walnut, CA 91789

Walnut
Local realty services provided by:CENTURY 21 Sierra Properties
20401 Blue Mountain Drive,Walnut, CA 91789
$2,800,000
  • 6 Beds
  • 5 Baths
  • 6,623 sq. ft.
  • Single family
  • Active
Listed by: mercedes barba
Office: exp commercial of california, inc.
MLS#:CL26106361
Source:Bay East, CCAR, bridgeMLS

Price summary

  • Price:$2,800,000
  • Price per sq. ft.:$422.77

About this home

Located in the Walnut Valley Unified School District and close to Mt. San Antonio College and Cal Poly Pomona, this extremely private 5.6-acre hillside estate in Walnut sits at the end of a long driveway with valley and mountain views. The two-story Spanish-style main home offers about 5,471 sq ft with 4 bedrooms, 4 baths, a dramatic atrium, formal dining room, entertainment room, billiards room, and sweeping tile throughout. A separate 1,152 sq ft guest house adds 2 bedrooms and 1 bath. Pool and spa. No HOA. Offered as-is.

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Home facts

  • Year built:1987
  • Listing ID #:CL26106361
  • Added:3 day(s) ago
  • Updated:November 15, 2026 at 04:01 PM

Rooms and interior

  • Bedrooms:6
  • Total bathrooms:5
  • Full bathrooms:5
  • Kitchen Description:Refrigerator
  • Living area:6,623 sq. ft.

Heating and cooling

  • Heating:Central

Structure and exterior

  • Year built:1987
  • Building area:6,623 sq. ft.
  • Lot area:5.6 Acres
  • Architectural Style:Single Family Residence, Spanish
  • Construction Materials:Stucco
  • Foundation Description:Slab
  • Levels:2 Story

Finances and disclosures

  • Price:$2,800,000
  • Price per sq. ft.:$422.77

Features and amenities

  • Appliances:Refrigerator
  • Laundry features:In Garage
  • Amenities:Atrium
  • Pool features:In Ground

Parking

  • Garage:Yes
  • Garage spaces:3
MLS LogoBay East 2026. CCAR 2026 bridgeMLS 2026. Information Deemed Reliable But Not Guaranteed. This information is being provided by the Bay East MLS, or CCAR MLS, or bridgeMLS. The listings presented here may or may not be listed by the Broker/Agent operating this website. This information is intended for the personal use of consumers and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Data last updated at November 15, 2026 CA_BRIDGEMLS Member Broker: Jesse Gibbs

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