20401 Blue Mountain Drive Walnut, CA ^$ 2,800,000

20401 Blue Mountain Drive

^$ 2,800,000

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20401 Blue Mountain Drive

Walnut, CA, 91789

^$ 2,800,000

Bedrooms6 Baths5.0 Sq 6,623

Monthly Estimate*

^$ 19,339

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Single Family Home for sale in Walnut, CA

for $2,800,000 with 6 bedrooms and 5 full baths. This 6,623 square foot home was built in 1987 on a lot size of 5.6.

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.

Single Family Active

Price

^$ 2,800,000

Bedrooms

Full Bath

Property Type

Single Family

Taxes

^$ 0

Style

Spanish

Lot Size

5.6

Year Built

1987

Town/City

Walnut

County/Region

Los Angeles

MLS | Web ID

0026106361

Features

General

Living Area 6623

Sewer Septic Type Unknown

Heating Central

Zoning WAR110000*

Architectural Style Spanish

Pool Features Tile In Ground

Construction Materials Stucco

Year Built 1987

View Hills Mountain(s)

Levels Two

Property Subtype Single Family Residence

Community Features Valley

County Los Angeles

New Construction false

Property Type Residential

HOA false

Attached Garage false

Other Structures Guest House

Status Active

City Walnut

Entry Location Foyer

Senior Community Y/N false

Lot Size Units Square Feet

Lot Size Square Feet 243849

Spa Features In Ground

Property Condition Fixer Repairs Major

Standard Status Active

Interior

Fireplace Features See Through Dining Room Guest House Library

Total Stories 2

Heating Y/N true

Fireplace Y/N true

Laundry Features In Garage

Total Baths 5

Exterior

Parking Features Driveway

Lot Features Horse Property

Lot Size Area 243849

Foundation Details Slab

Spa true

Building Area Total 6623

Lot Size Acres 5.6

* Excluded Features

List By

Mercedes Barba

Listing Agent

Exp Commercial Of California, Inc.

Broker

barba.mercedes@gmail.com

Affordability Calculator

$19,339

Per Month

Monthly Principal & Interest: $19,339
Monthly Property Taxes: --
Monthly Home Insurance: --

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Yearly Home Insurance

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

Trends
Schools

Single family listings in Walnut, CA

Average List Price ^$1,584,252

Percent of Sale Price 43%

About Walnut, CA

30,121 Population

0% Since 2002

^$98,564 Median Income

44.26 Median Age

32% Households with Children

View more area information

Trends Information provided by ATTOM Data Solutions.

4827338 Elementary School

0 Middle School

Unknown High School High School

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Pricing History

Date	Price	Price Change	Description
11/11/2026	$2,800,000		Listed Price

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20401 Blue Mountain Drive, Walnut, CA, 91789 is a Single Family Home for sale at $2,800,000 with 6,623 sqft and a lot size of 5.6. 20401 Blue Mountain Drive has 6 bedrooms, 5.0 baths, and was built in 1987. The property's zip code is 91789 which is in Walnut, CA

*Information deemed reliable but not guaranteed.

Financial calculator disclaimer: 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.

Listing data provided courtesy of the Internet Data Exchange Program of the California Desert Association of Realtors.

Based on information from the California Desert Association of REALTORS® as of 11/12/2026. 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. Properties may or may not be listed by the office/agent presenting the information.

The data relating to real estate for sale on this web site comes in part from the Internet Data Exchange Program of the California Desert Association of Realtors. Real Estate listings held by brokerage firms (licensees) other than Weichert Realtors include the name of the listing brokers.

The information being provided is for consumers' personal, non-commercial use and may not be reproduced or redistributed. Its sole purpose is to be used to identify prospective properties consumers may be interested in purchasing.

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20401 Blue Mountain Drive

Single Family Home for sale in Walnut, CA

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