Some homes are large. This one is expansive in a way that enhances how you live and how you move through it. Originally designed in 1903 by noted architect Frank Van Trees for Joseph Colgate-McQueen, a member of the family behind one of America's most storied household names, the Colgate Mansion spans four beautifully connected levels, plus a restored 2-room carriage house w/ full bath; this is where historic grandeur and modern livability meet effortlessly. The floor plan is genuinely rare: four distinct levels, unified by a dramatic four-story staircase crowned by a skylight that draws natural light through the heart of the home. Cleverly placed windows and a glass-paneled floor flood the home with light, while French doors and a folding glass wall open to decks on every level, each framing panoramic city and park views. Radiant floor heating and three gas fireplaces complete the warmth and ease. The main level balances classical scale with effortless livability. Formal living and dining rooms flow naturally into a spacious kitchen anchored by a generous island, opening to a family room and heated walk-out deck overlooking the garden and carriage house. Five bedrooms and a dedicated home office span the third and fourth levels. The top floor is devoted to the primary suite: a walk-out deck with sweeping downtown views, a spa-like bath, ample closets, and an additional room for a nursery, sitting room, or office. The third level offers three bedrooms, a home office, two full bathrooms, and a sizeable deck. The lower level features a bedroom suite with for guests or extended family, a media room with built-in home theater, and direct yard access. The two-room carriage house w/ full bath, accessed independently from Grove Street, adds a self-contained retreat for a studio, office, or guest quarters, a rare bonus that few properties at any price can offer. Original character and contemporary refinement exist in harmony: Rebuilt from the structural level up in the mid-2000s, the home retains its historic presence with the confidence of modern infrastructure. A glass-paneled bridge, a kitchen w/ SubZero and Wolf appliances, a garage-to-kitchen dumbwaiter, EV charger, and interior sprinklers. A deep 2-car garage and landscaped grounds complete the offering. Situated in the heart of Alamo Square, steps from the Painted Ladies and the park, and a short walk from Hayes Valley & the Divisadero Corridor where the city's best dining and boutique shopping converge.