Welcome to 251 Lassen Drive in San Bruno, a thoughtfully designed 4-bedroom, 3-bathroom home offering approximately 2,040 square feet of living space with exceptional flexibility for modern living, multi-generational households, or work-from-home lifestyles. The main living level features three bedrooms, including a spacious primary suite with two closets and a private en-suite bathroom. The additional upstairs bedrooms each include their own closets, providing comfort and functionality. Just off the kitchen is a separate bonus room, ideal for a home office, fitness room, or creative space. The lower level offers a versatile second living area with its own bedroom, bathroom, and kitchenette, along with direct access to the two-car garage and backyard. This level includes a door for added privacy, making it well suited for extended family, guests, or generational living. For added convenience, the laundry facilities are located in the utility room. Situated on a 5,575 sq ft lot, this home provides both space and functionality for everyday living. The property offers a flexible layout designed to adapt to a variety of living needs.