SketchUp Pro 2021 remains a popular version for many architecture, interior design, and construction professionals. It balances modern features (like improved Live Components and better performance for large models) with system stability. Below is everything you need to know about downloading and activating this version. Official Download Method (Recommended) The safest way to download SketchUp Pro 2021 is through Trimble’s official legacy portal . However, note that as of 2026, SketchUp Pro 2021 is no longer under active support.