20401 Blue Mountain Drive, Walnut
$2,800,000
6 bd · 5 ba · 6,623 sqft · Home · Walnut · 8 days on market
Updated November 11, 2026
Key Facts
- Price / SqFt
- $423
- Property Type
- Home
- Year Built
- 1987
- Lot Size
- 243,849 sqft
- Garage
- 3 cars
- Stories
- 2
- Days on Market
- 8
- Listed
- Nov 3, 2026
- MLS #
- 26106361
- Status
- Active
Request a Showing
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.
Highlights
- 6-bedroom, 5-bath home.
- 6,623 square feet of living space.
- Located in Walnut.
Price History
| Date | Price | Change |
|---|---|---|
| Nov 11, 2026 | $2,800,000 | — |
| Listed Nov 3, 2026 | ||
Location
About Walnut
- Active Listings
- 167
- Median Price
- $1,348,000
Estimate a Monthly Payment
Estimated Monthly Payment
$18,286/mo
Includes estimated taxes and insurance at the assumption rates below. HOA dues are not included — enter your community's HOA (varies widely by community, and absent from listing data) for an accurate total.
- Principal & Interest
- $14,903
- Property Tax
- $2,567
- Insurance
- $817
- HOAnot included — enter your dues
- $0
Estimate only — not a loan offer or rate quote. Confirm actual figures with a lender.
Get Pre-Approved →Listing courtesy of Exp Commercial of California, Inc.
Based on information from California Regional MLS as of 2026-11-11T23:43:49.470Z. 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.