19W115 17th Place Rare, substantially rebuilt custom ranch offering 3, 813 sq ft of finished living space on a 227' x 100' / 0.52-acre lot in Congress Knolls, a quiet unincorporated DuPage County enclave near Oak Brook, Elmhurst and Glen Ellyn. Close to expressways, shopping, parks and major western suburban amenities. Understated from the street, this home opens to a surprisingly expansive, beautifully finished interior and a private park-like rear setting. Current taxes are $13, 154. A lower unincorporated tax profile, municipal sewer, private water system and no municipal water bill create a rare ownership-cost advantage for a home of this size, quality and location. Completely remodeled with a major addition in 2007 and kitchen in 2017, the home features 2, 707 sq ft of main-level ranch living plus a 1, 106 sq ft finished walkout lower level. The home includes 5 bedrooms, 4 baths, hardwood and premium natural stone finishes, 3 full masonry fireplaces, radiant-heated bath floors, custom multi-head showers, two large jetted tubs, premium lighting and detailed trimwork. The wraparound deck and stamped concrete patio provide exceptional outdoor living and entertaining space. The finished walkout lower level has 9' ceilings, radiant floor heat, a 28' x 35' great room, kitchenette, surround sound, premium acoustic ceiling, solid slab granite bath, fireplace and direct courtyard access. This space works for guests, fitness, media, entertaining or multi-generational flexibility. Mechanical systems include 2 HVAC systems with 3-zone comfort control, Honeywell air filtration/zoning, Buderus high-efficiency boiler for radiant heat, Navien tankless water heater (4/2026), VFD well pump (10/2025), 200 amp main electric service plus 100 amp subpanel, generator prep, whole-house water treatment (8/2024), Flo automatic water shutoff, Lutron lighting control system, hardwired smoke/CO detectors, whole-house alarm, R-40 ceiling insulation, soundproofed interior walls and an engineered drainage system designed to protect the lower level. Rare parking and utility package: 2, 800 sq ft concrete driveway, 13 exterior parking spaces, 563 sq ft heated/finished attached garage with epoxy floor, hot/cold softened water, floor drain, kitchenette and deck access, plus a 336 sq ft detached garage built to match the home. The park-like rear yard includes approximately 100' x 100' of usable backyard space with room for a future pool, sport court, expanded patio, garden or play area, subject to buyer due diligence. Low-maintenance brick/Hardie Board exterior, Low-E windows, sprinkler system, copper landscape lighting, Trex deck, stamped/paver courtyard, natural gas grill connection and exterior audio complete this exceptional property. Professional photos, drone imagery and Matterport 3D tour available.