448 21st St Rare offering in coveted Gillette Regent Square, North of Montana one of the Westside's most sought-after enclaves. Gated driveway and lush, gorgeous landscaping welcomes you to a white brick traditional residence with incredible natural light and white oak floors throughout. Indoor-outdoor connectivity, big windows and high ceilings brings the outside greenery in. Chef's kitchen: marble island/counters, breakfast area, Viking 8-burner range, Sub-Zero fridge/freezer, farmhouse sink + prep sink, full walk-in pantry. Dining room w/ coffered ceilings & wainscoting. Main-level guest suite/office. Upstairs: landing den w/ built-in marble desk, primary suite w/ two walk-in closets, his & her loo & large terrace with fireplace. Three additional en-suite bedrooms, each w/ walk-in closet & white marble bathrooms. Custom fixtures, window coverings & upstairs laundry room. Basement level: soaring ceilings, glass doors, media room w/ theater seating, pro gym, built-in bar, temp controlled wine room, full bath doubling as pool bath, plus additional en-suite guest bedroom and bath. Outdoor entertaining at its finest: pizza oven, Wolf grill, outdoor fridge, sink & bar seating, pool w/ automatic cover, swim jets for laps & a custom mosaic on the pool floor. Mature hedges provide complete privacy while the yard basks in incredible natural light, with sun on the pool all afternoon. Covered cabana lounge & heated covered dining area, outdoor shower, bluestone hardscape. Crestron entertainment system, pebble garage floor with built-ins, custom lighting and security system.