Welcome to 53-55 E 39th Street, a rare and spacious duplex located in the heart of San Mateo. This versatile property offers an incredible opportunity for investors, multi-generational living, or owner-occupants seeking additional rental income. The front unit features 3 bedrooms and 2 bathrooms with a generous layout ideal for a family or primary residence, while the rear unit offers 2 bedrooms and 1 bathroom, perfect for a small family. Each unit enjoys its own private entrance, garage, indoor laundry, and access to outdoor yard space. Interiors are bright and well-maintained, with hardwood flooring and updated kitchens throughout. Not to mention each unit has its own oversized back yard, bringing in additional cashflow for investors. Located on a quiet, tree-lined street just minutes from Hillsdale Shopping Center, Caltrain, top-rated schools, and an array of dining and retail options, this property offers a perfect blend of comfort, convenience, and long-term value. Easy access to Highways 92, 101, and El Camino Real makes commuting a breeze. Whether you're looking to live in one unit and rent the other, or add a high-quality asset to your real estate portfolio, 53 E 39th Street presents a rare and rewarding opportunity in one of the Peninsulas most desirable locations.