673 Castlehill DR
Walnut, CA, 91789
$1,788,000
4 Beds
4 Baths
2,579 SqFt
0.28 Acres
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MLS #AR26056234 image #0
Brand new custom-built luxury home in the heart of Walnut featuring soaring ceilings, sweeping city light and hill views, and an exceptional floor plan designed for modern living. This 4-bedroom, 3.5-bath residence offers 2,579 sqft of meticulously crafted living space with premium finishes throughout.
At the heart of the home, a grand open-concept living area seamlessly connects the gourmet kitchen, dining, and living spaces — an entertainer’s dream designed to accommodate large gatherings with ease. The expansive kitchen anchors the space with generous counter space and an effortless flow that makes hosting feel natural.
The main floor features a private ensuite bedroom — perfect for guests or multi-generational living. Upstairs, the grand primary suite is a true retreat with a spa-inspired bath complete with a freestanding soaking tub, walk-in shower, and an oversized walk-in closet. Two additional upstairs bedrooms share a well-appointed Jack and Jill bathroom — ideal for family living.
Enjoy panoramic views of the city lights and rolling hills from the comfort of your own home. No HOA. No Mello Roos. Award-winning Walnut Valley Unified School District and within close proximity to shopping, entertainment and easy access to major freeways

Property Details

Price:
$1,788,000
MLS #:
AR26056234
Status:
Active
Beds:
4
Baths:
4
Type:
Single Family
Subtype:
Single Family Residence
Neighborhood:
668walnut
Listed Date:
Mar 26, 2026
Finished Sq Ft:
2,579
Lot Size:
12,225 sqft / 0.28 acres (approx)
Year Built:
2026
Newconstruction668 – Walnut668walnutWalnut Valley UnifiedMountain(s)

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Schools

School District:
Walnut Valley Unified

Interior

Bathrooms
2 Full Bathrooms, 1 Three Quarter Bathroom, 1 Half Bathroom
Cooling
CA
Laundry Features
IN
Levels
U
Main Level Bathrooms
2
Main Level Bedrooms
1

Exterior

Attached Garage YN
1
Common Walls
NCW
Community Features
SL
Garage Spaces
2
New Construction YN
1
Parking Spots
2
Parking Total
2
View
CI, MT

Financial

Map

Community

Market Summary

Current real estate data for Single Family in Walnut as of Mar 28, 2026
98
Single Family Listed
75
Avg DOM
484
Avg $ / SqFt
$1,370,894
Avg List Price

Property Summary

    673 Castlehill DR Walnut CA is a Single Family for sale in Walnut, CA, 91789. It is listed for $1,788,000 and features 4 beds, 4 baths, and has approximately 2,579 square feet of living space, and was originally constructed in 2026. The current price per square foot is $693. The average price per square foot for Single Family listings in Walnut is $484. The average listing price for Single Family in Walnut is $1,370,894.

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673 Castlehill DR
Walnut, CA