Unique opportunity in Penn Valley: expanded split-level with 2-story library addition, indoor pool and tennis court. 412 Sprague features extraordinary features and finishes throughout, reminiscent of a bygone era. Entry with intricate marble tiled floors and vintage mirror clad walls. Formal living room with fireplace and oversized bay window opens to the dining room with extensive built-in storage that comfortably seats sixteen and opens to a walled, gated bluestone patio. The kitchen is centrally located w/ center island and separate breakfast area. Steps down to the family room with fireplace and wet bar. Over-the-top, two-story library/den lined with ornate custom millwork is accessed on the main level through the living room with views to the front and rear of the property. Off the living room is access to the indoor pool and lounge areas. Pool features a jetted spa, auto cover, and separate cabana/changing area with full bath and sauna. Laundry room and additional office space complete this level. Upstairs, the primary bedroom is lined with custom built-in closets on all sides and features an additional walk-in closet with furniture quality interiors. The en-suite marble-clad primary bath features Sherle Wagner fixtures, oversized shower w/ glass enclosure, separate water closet and vanity area. Two additional, well-proportioned bedrooms, both with extensive built-in storage and closets, and marble clad hall bath complete this level. The 4th bedroom is designed with separate built-in work/hang-out area and en-suite bath. Full, finished basement with large additional storage room. Flat lawns occupy the space between the pool enclosure and the lit tennis court at the rear of the property. A short walk to schools, and w/ close proximity to the Main Line's premier dining, shopping, and lifestyle destinations. Award-winning Lower Merion schools and a short commute with easy highway access to Center City Philadelphia. Property has incredible potential, but will require some updating.