The Living Building Challenge 3.0 incentivizes the use of regional building materials by requiring 20% of materials to come from within 500km, 30% to come from within 1000km, another 25% to come from within 5000km with the remaining 25% coming from anywhere in the world. Click the tools icon      in the upper left corner, then the radius button      to enter the radii around your project location in the map below and filter for regional materials and manufacturers.