The National Research Council’s National Guide for Wildland-Urban Interface (WUI) Fires (the Guide) recommends how to build and maintain wildfire-resilient buildings. It details how to build with noncombustible materials and to control surrounding vegetation. The impact analysis shows that satisfying the Guide’s recommendations can cost less than $5 per square foot for typical residential construction in WUI areas in Canada, and can save over $30 per $1 of added cost.