Set on a quiet, one-way street in Princeton's Riverside section, long favored by Princeton faculty and medical staff at Penn Medicine for easy access to both campuses. This 1940's colonial offers a rare blend of classic charm and a thoughtful modern side addition encompassing two stories and a full basement. The main level begins with an entrance hall opening to a formal living room through French doors and features a fireplace and alcove sitting area. A second set of French doors flow into a gracious dining room (currently being used as a sitting room) ideal for entertaining. The back of the home opens to a sun-filled family room with a skylight, creating a bright, inviting gathering space with a second fireplace. A galley kitchen includes a center island and breakfast bar with large windows overlooking the backyard and a separate cozy breakfast area with a French door to the brick patio and gardens. A flexible main-floor room, currently used as a bedroom can also pose as an in-home office or play space. A powder room and convenient first floor laundry completes this level. Upstairs, you'll find three bedrooms and a pass-through bedroom that could easily be converted into a fourth bedroom with the addition of a wall, a full hall bath services all bedrooms. The primary suite addition is spectacular for a home of this age, offering a vaulted ceiling, a skylight, floor-to-ceiling bookcases, generous closet space and a primary bathroom with dual sinks, all an unexpected luxury for homes of this era. The full basement beneath the side addition has been finished to include an office and TV room, with bilco doors providing direct exterior access. The original basement can also be finished, but is currently used as storage space. Extensive brick hardscaping includes: walkways, a two-car driveway, a rear patio and walls all which beautifully enhance the home's original 1940's design. The expansive and fully fenced, level backyard extends beyond the brick patio includes a discreet corner garden shed, while still offering ample space for lawn games, a future pool, or outdoor entertaining. This home offers exceptional space, light, and versatility in one of Princeton's most desirable in-town locations. Walking distance to Riverside Elementary School, restaurants, coffee shops and all that the town of Princeton has to offer. Updated HVAC systems, hot water heater, privacy fencing and recently improved professional landscaping.