Three performance levels: baseline code compliance (IECC 2021 — R-49 attic, R-20 wall, 5.0 ACH50 blower door for Zone 5); performance certification (ENERGY STAR for Homes HERS ≤ 80; LEED for Homes); and net-zero/high-performance (Passive House principles, R-60 attic, R-30+ wall with continuous exterior insulation, HRV/ERV, triple-pane windows, solar PV). Solar PV is installed and coordinated with Rocky Mountain Power’s net metering program. Utah’s Wasatch Front averages 5.5–6.5 peak sun hours per day — among the highest in the country — making solar one of the highest-return energy investments available to Utah homeowners.