Home improvement resale ROI and cost-vs-value by project, region, and country: how much a kitchen remodel, bathroom addition, garage door, and other projects return at resale. For homeowner and real-estate agents. Uses NAR Cost vs Value data for the US; for other countries uses the closest available local renovation-ROI benchmark and says so. Returns resale value added, recouped percentage, DIY-vs-contractor savings, and comparable projects.