Welcome to 305 Mountain Avenue, North Plainfield - a spacious and beautifully maintained Cape Cod-style home situated on a prime corner lot. Offering 4 bedrooms, 3 full bathrooms, and timeless charm throughout, this expanded cape provides the perfect blend of character and functionality. Step into the inviting foyer featuring wood flooring, a coat closet, and elegant decorative moldings. To the right, a spacious family room awaits, highlighted by a bay window, exposed wood-beamed ceiling, and a stunning brick wood-burning fireplace - perfect for cozy evenings. To the left, you'll find a warm and welcoming living room with wood flooring, another wood-burning fireplace, custom built-ins, and a second bay window that floods the space with natural light. Continue through to the formal dining room, where detailed moldings and rich wood floors create an elegant setting for entertaining. The eat-in kitchen, accessible from both the foyer and dining room, features ample cabinetry, granite countertops, stainless steel appliances, tile backsplash, and a casual dining nook. Adjacent to the kitchen is a well-placed laundry room with direct access to a beautiful sunroomperfect for relaxing while overlooking the backyard. The first floor also includes a comfortable bedroom and a full bath with a stall shower, ideal for guests or one-level living. Upstairs, you'll find three generously sized bedrooms, all with hardwood floors. The expansive primary suite offers versatile space for a home office, fitness area, or cozy sitting room. A full bathroom on this level boasts a soaking tub and separate stall shower. Step outside to your own private, fenced-in backyard oasis. A large paver patio leads to a tranquil pond with a waterfall feature and charming footbridge, while a separate path leads to a spectacular inground poolperfect for summer entertaining. The partially finished basement offers incredible potential with a large bonus room featuring a third wood-burning fireplace, a full bathroom, and space that could be used for a kitchenette, additional bedroom, or home office. With direct access to the two-car garage, this lower level is ideal for multigenerational living or guest accommodations. Conveniently located with driveway access from Jeffries Place, this one-of-a-kind home offers both comfort and versatility in a picturesque North Plainfield neighborhood.