5209 Newcastle Ln A private Spanish Mediterranean retreat tucked within the prestigious 24-hour guard-gated enclave of Mountain View Estates in sunny Calabasas. Set on an expansive 16K+ SF lot, this home features 6 ensuite bedrooms, 6.5 baths, and 6, 252 SF of living space, blending warmth, scale, and classic architectural character with a true resort-style setting. A dramatic entry introduces rich engineered hardwood floors, exposed beamed ceilings, oversized corner windows, and elegant archways that carry throughout the main living spaces. The chef's kitchen connects to a breakfast area overlooking the backyard and is complemented by both large and small wine refrigerators, while the formal dining room and additional living spaces flow naturally from the grand entryway. Upstairs, the oversized primary suite offers a private lounge space, fireplace, balcony, dual walk-in closets, and an updated spa-inspired bath. Outdoors, the lushly landscaped backyard embraces California living with exceptional privacy, mature trees, a pool and spa, outdoor fireplace, built-in BBQ, flagstone patios, and sprawling lawn space. Additional highlights include solar and a 3-car garage. Located moments from top-rated schools, upscale shopping, dining, and scenic hiking trails, this is a private Calabasas retreat that balances timeless design with effortless indoor-outdoor living.