Rarely available in sought-after Mid Town Petaluma, 837 Madison Street presents a spacious duplex on a generous 0.26 acre lot with a detached carport. Each unit offers an abundance of natural light, with comfortable and efficient bedrooms designed for everyday living. Recent improvements include new flooring, fresh interior paint & new fencing enhancing both appeal and peace of mind. The property's prime location offers convenient access to shopping, dining, schools, historic downtown Petaluma, and nearby 101 freeway access for an easy commute. With potential to add an ADU under SB9, the opportunities for value and flexibility are exceptional. Whether you're an investor seeking strong rental potential or a buyer looking for an owner-occupied opportunity with supplemental income, this rare property combines space, versatility, and upside. Don't miss your chance to make it yours.