Welcome to 133 Boylston St, an airy & updated 4bed 2bath upper duplex in desirable East Watertown. From the private entryway, we are greeted by expansive living & dining areas boasting gleaming hardwood floors, soaring ceilings & ample exposures. The modern eat-in kitchen, featuring granite peninsula & stainless appliances, connects to a serene treetop sunroom. Two spacious bedrooms & a charming tiled bath complete this level. Ascending the stairs, we find two additional bedrooms, including the glorious sky-lit primary & adjacent luxurious bath. The hallway leads to a convenient laundry room & 2 walk-in closets. Efficient 2023 heat pump system provides central AC by Nest thermostat. Enjoy evenings on your sprawling private deck or cheerful fenced yard. Exclusive use driveway offers plentiful parking & garage storage. Wonderful location just a stone's throw from the new Hosmer School, with convenient access to MBTA bus, Arsenal Yards, Cambridge, the Charles River & so much more.