A tub-to-shower conversion focuses specifically on replacing an existing bathtub with a walk-in shower. It involves plumbing drain modification, waterproofing, tile installation in the shower area, and a glass enclosure, but typically leaves the rest of the bathroom unchanged. A full bathroom renovation addresses everything simultaneously, tile throughout, new vanity, toilet, flooring, lighting, and ventilation. Many homeowners choose to do the full renovation because the disruption period is similar but the comprehensive result is much more impactful.