998 Oak St, Columbus, OH 43205

Two parcels, three dwellings, one assembled compound in Olde Towne East — offered together under a single contract. 990 Oak is a PHIUS Zero 2021 certified passive house completed September 2025. 660 sq ft with a 4.4 kW owned solar array (net metered, AEP Ohio interconnection approved), ERV balanced ventilation, Alpen high-performance windows, TimberHP wood-fiber insulation, Zip System sheathing, insulated crawl space, and thermally modified Arbor Wood siding under a red metal roof with custom rain chains. Most months there is no electric bill; water is the only utility expense. Interior finishes include earthen and lime plaster, tadelakt, handmade teal tile, soapstone counters, a skylight, and a sacred-geometry sliding loft ladder. Attached 2.5-car garage, 25' × 24', EV-ready outlet. Design by GeoAlchemy Studio, certification by SOL Design + Build. 998 Oak is a 1926 two-story taken to the studs in 2015–16: opened floor plan, custom beams, lofted primary ceiling with walk-in closet, Corian counters, white oak shelving, new electrical, HVAC and water heater, full basement, central air. Roof 2016, windows and Hardie siding 2020, custom white oak mantel and quarter-sawn sapele built-ins 2022. Behind it, a separately metered 759 sq ft carriage house — one bedroom, full kitchen and bath, walk-in closet, in-unit laundry — currently income-producing. The site: 6-ft vertical cumaru fence, paver patio with brick accents, pergola over the fire pit, spiral zen garden with Ohio native pollinators around a Japanese maple, three off-street spaces beyond the garage. Residential Green and Energy Efficient Addendum and PHIUS design certification letter available.