Building Component Library

Welcome to the new BCL

GitHub-based, API-focused

The Building Component Library is a collection of building data used to create building energy models. The data are broken down into components that represent parts of a building and measures that describe changes made to a building. BCL content is stored across multiple GitHub repositories contributed by the building energy modeling community. Search for components and measures by type or keyword. Once you find the content you need, download and use it in your energy modeling workflow.

Looking for your BCL key?

Browse and Download Content


View repo and release status


Learn how to use the search and download APIs


Add your content to the BCL