Welcome to 112 Portsmouth Circle, a meticulously maintained and expanded end-unit townhome situated on one of the most coveted lots in Thornbury Township’s highly desirable Greenbriar community. Offering over 3,000 square feet of heated living space plus an additional newly finished lower level, this premier home seamlessly combines architectural elegance, modern updates, and effortless turn-key comfort. Upon entry into the home, a thoughtful layout featuring pristine luxury vinyl plank flooring and expansive bay windows that flood the open dining and living spaces with natural light. At the heart of the home, the dramatic two-story family room commands attention with its soaring ceilings, marble-surround gas fireplace, and sweeping views of the surrounding landscape. The adjacent updated kitchen is designed for seamless entertaining, complete with sleek quartz countertops, premium stainless steel appliances, single-basin sink, updated light fixtures, and a bright breakfast nook. Sliding glass doors lead out to your private composite deck—boasting arguably the finest panoramic views in the entire neighborhood. Enjoy peaceful morning coffee or sunset gatherings overlooking an expanse of flat, lush green open space. Upstairs, the owner's retreat serves as a true private sanctuary, featuring a built-in window seat, four separate closets (including two expansive walk-ins), and a spa-like ensuite bath with dual vanities, a deep soaking tub, and a separate glass stall shower. Two additional spacious bedrooms, a full hall bath, a flexible hallway nook perfect for a home desk or reading bench, and a dedicated upper-level laundry room with sink complete the second floor. The standout feature of this property is the newly fully finished basement, expertly crafted to maximize versatility and living space. Complete with a pristine, brand-new full bathroom, this expansive lower level serves as an ideal guest suite, secondary media/entertainment lounge, private office, or home gym, while still preserving ample unfinished area for organized storage. Enjoy ultimate low-maintenance living with a modest $221/month HOA covering lawn care, snow removal, trash, roof, and exterior maintenance. Connect directly to local walking trails and Cheyney Park, or take a short drive to historic West Chester Borough and Media for dining, boutique shopping, and seasonal community events. A rare blend of privacy, upgrades, and location—schedule your tour today!