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685 Castlehill Drive, Walnut, CA 91789

$1.40M4bd · 4ba · 2,467 sqft
Lot 12,060 sqft•Single Family Residence•
Active
•55d on market•MLS# WS-26177718

Property Description

Introducing the brand new single family home in Walnut, built in 2026 and located within the highly sought after Walnut Valley Unified School District, with NO HOA and NO Mello Roos Tax. This exclusive enclave offers approximately 2,467 square feet of refined living space on generous lots ranging from approximately 12,060 square feet, floor plans featuring four bedrooms and three and a half bathrooms to four and a half bathrooms. Designed for modern comfort and elegant entertaining, each residence showcases soaring ceilings, luxury vinyl plank flooring, sleek iron railings, and a bright open concept layout centered around a gourmet kitchen with quartz countertops, premium stainless steel appliances, custom cabinetry, and a large center island. Walls of windows and sliding glass doors bring in abundant natural light while creating seamless indoor outdoor living, opening to landscaped backyards with lush lawns, pergola covered patios, and potential ADU possibilities. Additional highlights include a main level junior suite ideal for guests or multigenerational living, a spa inspired primary retreat with a soaking tub and walk in closet, two car garages with stone facades, private side yards, hillside views, and a convenient location near shopping, freeways, and top rated schools. Certain photos have been virtually staged and/or enhanced or generated using artificial intelligence to illustrate possible furnishings, landscaping, or design concepts. Actual property conditions may vary.

Features & Amenities

FeeBuilt 2026

Property Details

Land Type
Fee
Year Built
2026
Property Type
Residential
Property Subtype
Single Family Residence
Parking Spaces
2
Garage Spaces
2
Cooling
Central Air
View
City Lights, Mountain(s)
City
Walnut
Zip Code
91789
County
Los Angeles
Listed byReal Brokerage Technologies, Edward Chen

Mortgage Calculator

Current Rates

$
$
%
Monthly Payment
$7,069.05
Principal & Interest
Loan Amount
$1,118,400
Total Interest
$1,426,458
Total Payment Over 30 Years
$2,544,858
This calculator provides estimates only. Actual mortgage payments may include taxes, insurance, HOA fees, and PMI. Contact a lender for accurate quotes.

Comparative Market Analysis

Residential Tier · 5 active · 5 closed

685 Castlehill Drive, Walnut, CA 91789

Walnut · Single Family Residence

$1.40M
Residential Tier
Beds
4
Baths
4
Sqft
2,467
Lot
12,060 sqft
Year
2026
$/Sqft
$567
Pool: No✓
View: city✓
Garage: 2-car✓

Listed 15.3% below the median closed sale of $1,650,000. Price per sqft ($567) is a 14% discount to closed comps ($657).

Price Position

Priced below the market — value advantage over the field.

Price advantage
Subject listed at $1.40M· $567/sqft
Total list price
Closed comps
vs closed median $1.65M
−$252K (−15.3%)
Active comps
vs active median $1.39M
+$9K (+0.7%)
Price per sqft
Closed compsinsufficient comp data
Active comps
vs active avg $/sqft $623
−$56 (−9.0%)

Active Properties (5)

Active Comparables

AddressCityYearBDBTHSqFtLotSzLP/SqFtLPDIMScore
673 CastlehillWalnut2026442,57912,225$538$1.39M398
693 Castlehill DriveWalnut2026442,4329,944$571$1.39M6796
22112 Portofino DriveWalnut2024442,3253,190$817$1.90M9586
20505 Missionary Ridge StreetWalnut1974432,2659,932$573$1.30M9584
20512 StarshineWalnut1974432,2658,621$618$1.40M2483
Total: 5 · Average4.03.62,373.28,782.4$623.4$1.47M56.8
Median2,325$1.39M

Closed Properties (5)

Closed Comparables

AddressCityYearDateBDBTHSqFtLotSzLPSPSP/SqFtSP/LPDIMScore
309 Camino De GloriaWalnut201109/02/2026442,4357,422$1.20M$1.16M$4740.964890
1941 Onyx DriveWalnut198808/12/2026432,44012,036$1.73M$1.65M$6760.956889
22080 Portofino DriveWalnut202409/21/2026442,5203,542$2.00M$1.85M$7340.938788
22092 Portofino AvenueWalnut202407/31/2026442,3253,190$1.82M$1.80M$7740.9936586
825 BRIDGEWATER LaneWalnut198608/11/2026432,4818,645$1.55M$1.55M$6251.001983
Total: 5 · Average4.03.62,440.26,967$1.60M$1.60M$656.6—117.4
Median2,440$1.65M$1.65M

Market Analysis

List vs Sale $/SqFt

Sale Price Trend

Days on Market

Sale vs List Price

AI-generated CMA

This analysis was generated automatically from MLS data. For an in-depth, human-reviewed valuation, contact Joseph Sardella at josephsardella@gmail.com.