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 22.9% below the median closed sale of $1,800,000. Price per sqft ($538) is a 22% discount to closed comps ($686). Expect a longer timeline — comps averaged 148 days on market.
Price Position
Priced below the market — value advantage over the field.
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 | 55 | 98 |
| 693 Castlehill Drive | Walnut | 2026 | 4 | 4 | 2,432 | 9,944 | $571 | $1.39M | 68 | 95 |
| 22056 Portofino Drive | Walnut | 2024 | 4 | 4 | 2,618 | 3,500 | $688 | $1.80M | 95 | 87 |
| 22112 Portofino Drive | Walnut | 2024 | 4 | 4 | 2,325 | 3,190 | $817 | $1.90M | 96 | 85 |
| 20031 Wildblossom Dr. | Walnut | 1989 | 4 | 3 | 2,575 | 16,862 | $718 | $1.85M | 45 | 82 |
| Total: 5 · Average | 4.0 | 3.8 | 2,483.4 | 9,111.2 | $672.2 | $1.67M | 71.8 | |||
| Median | 2,467 | $1.80M | ||||||||
Closed Properties (5)
Closed Comparables
| Address | City | Year | Date | BD | BTH | SqFt | LotSz | LP | SP | SP/SqFt | SP/LP | DIM | Score |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 309 Camino De Gloria | Walnut | 2011 | 09/02/2026 | 4 | 4 | 2,435 | 7,422 | $1.20M | $1.16M | $474 | 0.96 | 48 | 89 |
| 22080 Portofino Drive | Walnut | 2024 | 09/21/2026 | 4 | 4 | 2,520 | 3,542 | $2.00M | $1.85M | $734 | 0.93 | 87 | 88 |
| 1941 Onyx Drive | Walnut | 1988 | 08/12/2026 | 4 | 3 | 2,440 | 12,036 | $1.73M | $1.65M | $676 | 0.95 | 68 | 87 |
| 22070 Portofino Avenue | Walnut | 2024 | 06/29/2026 | 4 | 4 | 2,520 | 3,505 | $2.11M | $1.95M | $774 | 0.93 | 172 | 87 |
| 22092 Portofino Avenue | Walnut | 2024 | 07/31/2026 | 4 | 4 | 2,325 | 3,190 | $1.82M | $1.80M | $774 | 0.99 | 365 | 85 |
| Total: 5 · Average | 4.0 | 3.8 | 2,448 | 5,939 | $1.68M | $1.68M | $686.4 | — | 148 | ||||
| Median | 2,440 | $1.80M | $1.80M | ||||||||||
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.