Introducing One Helen, a rare opportunity to create a custom-quality luxury residence in the heart of Nob Hill. Positioned on one of San Franciscos most charming and private lanes, this shovel-ready opportunity offers the best of both worlds: an approved architectural vision with construction ready to begin, while allowing the future owner to personalize select finishes and design details. Designed by acclaimed architect William Pashelinsky, this four-level residence is envisioned as a sophisticated contemporary home offering approximately 2,492 square feet of living space, with 3 bedrooms, 3 full bathrooms, 2 half bathrooms, an attached garage, and multiple indoor-outdoor living spaces. The thoughtful design emphasizes natural light, privacy, and effortless entertaining, featuring a refined chefs kitchen, luxurious primary suite, flexible fitness/media space, private garden, and expansive terraces. One Helen combines the confidence of a fully realized architectural plan with the opportunity to create a home tailored to your vision. Moments from world-class dining, boutique shopping, Huntington Park, the Fairmont Hotel, cable cars, and the Financial District, this exceptional residence offers a rare opportunity in one of San Franciscos most iconic neighborhoods.