This impeccably-maintained Presidio Heights single-family home has not been seen by the public for five decades. Original mahogany woodwork and arched beamed ceilings are untouched by paint; hardwood floors are preserved. Positioned on the north side of a distinguished block, this property boasts a massive lot size with close proximity to The Presidio. The main level has a spacious living room w/southern facing windows & a fireplace. North-facing formal dining overlooks the expansive, flat backyard, with views of the Golden Gate & connects to the breakfast room, kitchen & backyard access. A powder room completes this level. The second level features four bedrooms & two baths. The primary bedroom & adjacent balcony overlook the Bay & the Golden Gate Bridge. An ensuite bathroom connects to another bedroom or office. Two add'l bedrooms on this level share a hall bath. The uppermost floor includes a study, two bedrooms & a bathroom. Unmatched views of the Bridge & incredible light encourage creative modifications. Laundry, storage, two bedrooms, a half bath are on the lowest level, which leads to the lush garden, & sitting area w/a tree-lined perimeter. With its timeless appeal and irreplaceable original features, this is a rare opportunity to own a turn-of-the-century masterpiece.