
673 Castlehill, Walnut, CA 91789
673 Castlehill, Walnut, CA 91789
Property Description
BRAND-NEW CUSTOM LUXURY HOME WITH BREATHTAKING CITY-LIGHT VIEWS IN WALNUT! This exceptional 4-bedroom, 3.5-bath residence sits on an expansive 12,000+ sq. ft. lot and offers approximately 2,579 sq. ft. of beautifully designed living space with premium, high-quality upgrades throughout. Soaring ceilings, sophisticated finishes, an open-concept floor plan, and panoramic city-light and rolling-hill views create an exceptional blend of luxury, comfort, and modern living. The impressive gourmet kitchen is the centerpiece of the home, featuring an upgraded backsplash, elegant glass-front cabinetry, quartz countertops, a large center island, and soft-closing drawers. It flows seamlessly into the dining and spacious family room, creating an ideal space for entertaining and everyday gatherings. A fireplace adds warmth to the family room, while luxury vinyl plank flooring and high ceilings enhance the home's contemporary style. The main level features a private ensuite bedroom, ideal for guests, extended family, or multigenerational living, plus a separate powder room. Upstairs, the luxurious primary suite offers a spa-inspired retreat with a freestanding soaking tub, walk-in shower, and oversized walk-in closet. Two additional bedrooms share a convenient Jack-and-Jill bathroom. The oversized garage features epoxy flooring, abundant storage, and direct access to the home. The expansive backyard offers beautiful city-light and hillside views, along with potential for an ADU or additional outdoor living space, subject to applicable city requirements. An additional street at the rear of the property provides added access and flexibility. NO HOA. NO MELLO-ROOS. Located in the highly regarded Walnut Valley Unified School District, this home is conveniently close to shopping, dining, entertainment, major freeways, and everyday conveniences. A rare opportunity to own a brand-new custom luxury home on a premium oversized lot with exceptional views, high-quality upgrades, and no HOA or Mello-Roos in the heart of Walnut.
Features & Amenities
Property Details
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Comparative Market Analysis
Residential Tier · 5 active · 5 closed
Walnut · Single Family Residence
Listed 12.4% above the median closed sale of $1,235,000.
Price Position
Positioned above the market — commands a premium.
Active Properties (5)
Active Comparables
| Address | City | Year | BD | BTH | SqFt | LotSz | LP/SqFt | LP | DIM | Score |
|---|---|---|---|---|---|---|---|---|---|---|
| 685 Castlehill Drive | Walnut | 2026 | 4 | 4 | 2,467 | 12,060 | $567 | $1.40M | 75 | 98 |
| 693 Castlehill Drive | Walnut | 2026 | 4 | 4 | 2,432 | 9,944 | $571 | $1.39M | 88 | 96 |
| 677 Castlehill Drive | Walnut | 2026 | 4 | 5 | 2,900 | 13,525 | $414 | $1.20M | 9 | 94 |
| 539 Bourdet | Walnut | 2005 | 4 | 4 | 2,676 | 8,040 | $523 | $1.40M | 74 | 84 |
| 438 Calle Alcazar | Walnut | 1977 | 3 | 2 | 1,420 | 20,990 | $915 | $1.30M | 100 | 58 |
| Total: 5 · Average | 3.8 | 3.8 | 2,379 | 12,911.8 | $598 | $1.34M | 69.2 | |||
| Median | 2,467 | $1.39M | ||||||||
Closed Properties (5)
Closed Comparables
| Address | City | Year | Date | BD | BTH | SqFt | LotSz | LP | SP | SP/SqFt | SP/LP | DIM | Score |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 19569 Vista Hermosa Drive | Walnut | 1977 | 05/22/2026 | 4 | 5 | 2,419 | 10,530 | $1.50M | $1.44M | $593 | 0.96 | 281 | 81 |
| 1135 Belbury Dr | Diamond Bar | 2000 | 07/31/2026 | 4 | 5 | 2,223 | 6,315 | $1.40M | $1.38M | $621 | 0.99 | 63 | 71 |
| 20123 Padrino | Walnut | 1978 | 06/30/2026 | 6 | 3 | 2,822 | 6,889 | $1.25M | $1.18M | $418 | 0.94 | 80 | 68 |
| 19735 Camino Arroyo | Walnut | 1977 | 05/26/2026 | 4 | 3 | 1,859 | 8,080 | $1.23M | $1.24M | $664 | 1.01 | 25 | 66 |
| 19819 Camino Arroyo | Walnut | 1977 | 05/04/2026 | 4 | 3 | 1,859 | 9,783 | $1.16M | $1.20M | $646 | 1.04 | 40 | 65 |
| Total: 5 · Average | 4.4 | 3.8 | 2,236.4 | 8,319.4 | $1.29M | $1.29M | $588.4 | — | 97.8 | ||||
| Median | 2,223 | $1.24M | $1.24M | ||||||||||
Market Analysis
List vs Sale $/SqFt
Sale Price Trend
Days on Market
Sale vs List Price
This analysis was generated automatically from MLS data. For an in-depth, human-reviewed valuation, contact Joseph Sardella at josephsardella@gmail.com.