8 GB minimum (16 GB or more recommended for complex models).
Before proceeding to , it is crucial to ensure your machine meets the minimum requirements to avoid performance issues.
5 GB free disk space required for a full installation. Additional space is needed for active projects.
If you encounter problems during installation, here are a few common solutions: Download Archicad 21
64-bit processor with two or more cores (Intel Core i5/i7 or AMD equivalent recommended).
No – . A new license will not activate an old version. You need the original license from the 2017–2019 era.
Choose the appropriate installer package for either Windows (EXE format) or macOS (DMG format). 8 GB minimum (16 GB or more recommended for complex models)
GRAPHISOFT Archicad 21 is a BIM (Building Information Modeling) software designed for architectural professionals, released in 2017 as a major update to the Archicad line. This version introduced patent‑pending Predictive Design™ technology and a completely redesigned stair tool, which were revolutionary for architectural design at the time. Today, while Graphisoft has released many newer versions (up to Archicad 29 as of 2025), Archicad 21 remains a valuable tool for firms that rely on specific workflows, need to maintain project consistency across teams using the same version, or are using older operating systems.
If your firm owns a perpetual or subscription license, insert your physical CodeMeter hardware protection key (dongle) into a USB port, or download your software-based license key via the Graphisoft License Manager Tool (LMT).
Open your web browser and navigate to http://www.graphisoft.com/downloads/ . This is the central hub for all software downloads from GRAPHISOFT, including installers for current and previous versions of Archicad, updates, add‑ons, and additional content such as sample projects. Always use the official website to avoid counterfeit or malware‑infested files from third‑party sources. Additional space is needed for active projects
Better handling of IFC (Industry Foundation Classes) data ensures smoother exchange with consultants using other BIM software. System Requirements for Archicad 21
You will need a Graphisoft ID to run the License Manager Tool, which activates your software key or hardware key. 2. Prepare Your "Paper" (Layouts & PDF Export)