Thoughtfully designed and custom-built by its original owner, this distinctive East Austin residence pairs modern architecture with forward-thinking sustainability. Just one mile from Downtown and the Texas Capitol, the home offers a rare opportunity to own a custom-built property that was ahead of its time in both design and performance. Constructed using Insulated Concrete Form (ICF) walls and a Structural Insulated Panel (SIP) roof system, the home was engineered for exceptional energy efficiency, durability, sound insulation, and year-round comfort. Owned solar panels, an on-demand water heater, sustainable bamboo flooring, recycled denim wall insulation, no-VOC building materials, clerestory windows that promote natural airflow, rainwater collection, and Google Fiber reflect its thoughtful approach to modern living. Expansive windows flood the interior with natural light, while polished concrete floors, clean architectural lines, oversized sliding barn doors, and an open-concept layout create a bright, contemporary living experience. Upstairs feels like a modern treehouse, opening to a private balcony with views of the historic Chestnut Avenue Moonlight Tower. Generous storage, large closets, a covered patio, mature pecan trees, and a fully fenced yard enhance everyday livability. Set on a spacious lot with alley access, the property offers the flexibility to expand or add an ADU (buyer to verify), creating exceptional long-term value in the heart of East Austin. Recent seller improvements include an HVAC system, fresh interior and exterior paint, deck repairs and refinishing, exterior window resealing, sliding door repair, updated plumbing fixtures, repaired shower tile, door adjustments, and additional maintenance completed following a pre-listing inspection. Stucco, roofing, and HVAC documentation are available for buyer review. This is a home where exceptional construction, intentional design, and an irreplaceable location come together.