Listed by Christie Locke•DRE #02031344• RE/MAX Gateway
Contact: 661-904-3635
For sale
$2,300,000
Est. $15,213/mo —
5
bd
•
6 ba
•
4,159
sq ft
28346 Old Spgs, Castaic, CA 91384
About this home
It's not just a home. .. Its an EXPERIENCE; An experience of truly elevated living in this one-of-a-kind Williams Ranch showpiece in Castaic. Built in 2022, this stunning 5-bedroom, 5.5-bathroom home offers 4,159 sq ft, redefining luxury living on the LARGEST LOT IN THE ENTIRE COMMUNITY sprawling over 22,238 sq ft. Designed to impress, the property showcases panoramic views, a state-of-the-art pool and spa, private basketball court, putting green, and exceptional upgrades throughout. Inside, the home blends modern elegance with spacious, thoughtfully designed living areas ideal for both everyday comfort and high-end entertaining. No expense was spared on the interior's special highest tiered options. Entertain in the living space downstairs or in the upstairs loft, and work from home in the downstairs office. Potential for multi-generational living with a bedroom on main floor with en-suite bathroom in a separated wing. Two bathrooms on the main floor. The primary suite is an absolute dream with ensuite spa-like bath, spacious closet, and panoramic views from the balcony. Each bedroom has its own bathroom, or one just outside of the bedroom door. A 3-car garage and two Tesla Powerwalls add convenience, efficiency, and cutting-edge functionality to this extraordinary residence. This is a rare opportunity to own one of Williams Ranch’s most exceptional homes. Welcome to the perfect balance of luxury, lifestyle, and innovation. .. WELCOME HOME!
Plan 15 in our Ridgeline Collection located at Williams Ranch a community. This two-story home has a 3-car garage providing lots of space for your cars. Here you have approximately 4,156 sq. ft. of living space! When you arrive home, the foyer opens up to your home office with French Doors where you can enjoy a relaxed setting. This home naturally flows into other spacious rooms where you can have company over to share a meal in your formal dining room. Ideal for entertaining family and friends with 5 bedrooms and 5.5 bathrooms. There is a huge kitchen island with a walk-in pantry for the chef to select and store favored ingredients adjacent to a tech area to cross off any items on to-do lists. This kitchen leads to a service pantry and a separate dining room. Your guests can have their own privacy as they visit in the 5th bedroom downstairs. Feel like staying in? Cozy up in the Family room in front of your fireplace and stay warm. The second level of this home has 4 bedrooms and an oversized bonus room plus a laundry/service room complete with a laundry room sink. The primary bedroom has a private bathroom with a tub, a separate shower, and a gigantic walk-in closet. From your primary bedroom you lookout towards your oversized backyard which you can design yourself! Create an oasis with a resort-style pool or a garden for your herbs in your backyard - the possibilities of what you can have are endless! This particular lot is unique and HUGE for those who want more outdoor space! This is a must-see! You can have it all! BIG Lots, BIG Views, BIG Homes! Welcome to Williams Ranch a community designed with you and your lifestyle in mind. Live on a 430-acre master-planned community nestled between the Sierra Pelona Mountains, Castaic Lake Recreation Area, and directly adjacent to Valencia’s Commerce Center. Come and be a part of a community that has an exceptional recreation center, a junior-size Olympic swimming pool, and an outdoor kitchen. Here you will be surrounded by abundant open-space hiking trails, numerous pocket parks, an entertainment amphitheater, large citrus orchards, working vineyards, and a wine pavilion. Most of the 497 homes will be single-story and gated, designed to embrace Castaic’s natural terrain and vistas, adhering to the highest standards of design. Photos and renderings may be of a Model and not of the actual homes.
Year
Property tax
Land + Additions
Assessment*
2025
$26,966 (+4.5%)
$582,624 + $1,362,924
$1,945,548
2024
$25,806 (+687.2%)
$582,624 + $1,362,924
$1,945,548
2023
$3,278 (+0.8%)
$571,200 + $1,336,200
$1,907,400
2022
$3,252 (+238.7%)
$73,581
2021
$960
$72,139
Public record
Public record
Zoning
Permits
Beds
5
Baths
6
Stories
—
Lot width
—
Lot depth
—
Lot size
0.51 Acres
Year renovated
2022
Finished Sq. Ft.
4,159
Unfinished Sq. Ft.
—
Total Sq. Ft.
4,159
Year built
2022
Style
Single Family Residential
County
Los Angeles County
APN
2866064024
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jul 9, 2026.
A-2-2
Heavy Agricultural
The Agricultural Zones A-2 are established to permit a comprehensive range of agricultural uses in areas particularly suited for agricultural activities. Permitted uses are intended to encourage agricultural activities and other such uses required for, or desired by, the inhabitants of the community. An area so zoned may provide the land necessary to permit low-density single-family residential development, outdoor recreational uses, and public and institutional facilities.
Permitted uses
Include but are not limited to:
Garden center
Housing-Group
Housing-Senior
Infrastructure
Mar 26, 2025 • Final
Pool/spa permit - county
Construct a new pool and spa.
Pool and hot tub
Dec 4, 2023 • Final
Roof mount residential solar
Install a roof-mounted photovoltaic system with a solar array.
Electrical
Solar
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Local insights from Redfin agents
Castaic is highly sought after for its scenic surroundings, highlighted by Castaic Lake and its popular boating, fishing, and hiking opportunities. Offering a more relaxed, small-town feel, the area appeals to buyers looking for peace, space, and a...
The real estate market is becoming more balanced. Buyers have more inventory, more data, and more time to make informed decisions than they did a year ago. Well-priced homes are still moving quickly, but today’s market rewards preparation, strategy,...