Welcome to 399 Plain Street, a charming 3-bedroom, 2-bath classic Cape full of character and ready for its next chapter. Ideal for buyers looking to customize and add their own personal touches, this home offers great potential with key updates already in place, including a 3-bedroom septic system installed in 2020, a recently updated first-floor bath and fresh paint throughout. The main level features a sun-filled dining area with French doors overlooking the private backyard, a kitchen, full bath, front-to-back living room with fireplace and a first-floor bedroom for flexible living. Upstairs offers two additional bedrooms and a second full bath. The basement includes laundry and potential for future finished space, while the one-car garage provides added storage. Conveniently located near shopping, restaurants, top-rated schools, Route 3 and all that Marshfield offers, including beaches, boating, marinas, and coastal South Shore living.