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  • 20401 Blue Mountain Drive

20401 Blue Mountain Drive, Walnut, CA 91789

$2,800,000 Approx. USD 6 beds, 5 baths
6,623 sqft

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The Keaty Team REALTOR® - Sales Associate 714-608-3298 m
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Lic#: 01276603
NRDS ID: 187514104
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thekeatyteam@bhhscal.com Tustin Office
18302 Irvine Blvd, Suite 240
Tustin, CA 92780
Phone: 714-832-8800
Fax: 949-565-7700
 Tustin 18302 Irvine Blvd, Suite 240
Tustin, CA 92780
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Mercedes Barba | barba.mercedes@gmail.com
Lic#: 02246637
Broker: Courtesy of Exp Commercial of California, Inc.
Phone: 909-973-3250

Agent Remarks

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.

Listing Details

Property type: Single Family Residence (Single Family)
Status: Active
MLS# 26106361
Price: $2,800,000
Beds: 6
Baths: 5 (5 full)
Dining Room,Guest Accommodations,Library,See Through fireplaces
Built in 1987
6,623 sqft
2 stories
5.60 acres
Lot size: 5.5980
County: Los Angeles
Property style: Spanish
Zoning: WAR110000*
Construction: Stucco
Interior features: Eat-in Kitchen,Atrium
Appliances: Refrigerator
Parking description: Door-Multi,Driveway,Garage
Lot description: Horse Property
Heating description: Central
Furnished: Unfurnished

Last Updated: 11/12/2026

 Days On Market (DOM): 8

 Find more Walnut homes and real estate

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The style of this listing is Spanish.
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Lat/Long: 34.052193, -117.858245.
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DISCLAIMER: There is NO WARRANTY, expressed or implied, for the accuracy of this information or its applicability to your financial situation. Please consult your financial and/or tax advisor. GET PRE-APPROVED The loan's interest rate will depend upon the specific characteristics of the loan transaction and credit profile up to the time of closing.

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