42 Hillside is a modernized early 1900s front porch Colonial set on an expansive parklike setting of 1.09 acres in desirable Upper Saddle River. Filled with character, the home features high ceilings, wood floors, large windows, a wood-burning fireplace and custom millwork throughout. The updated kitchen offers marble countertops, custom cabinetry and a built-in banquette with custom table, opening comfortably to the home's everyday living spaces. Three bedrooms plus an office with Palladian windows provide flexible options for a guest room, playroom, or home office. Updated baths with radiant heat add modern convenience while preserving the home's timeless appeal. Additional highlights include an oversized two-car attached garage, large circular driveway, central air, a new furnace installed in 2025 and a paver patio off the family room overlooking a private setting with mature shrubs and trees set in the quiet surroundings of Brook-Hill Estates. The property encompasses two lots, with a portion extending into New York State, totaling 1.09 acres - a truly rare and special offering.