We thank Matias Labbé for his superb research assistance and coordination with the Chilean government and TECHO. We thank seminar participants at UC-Berkeley, RIDGE, UEA, Wharton, NBER SI Urban Economics Group, for their comments. We acknowledge funding by MIGRA Millenium Nucleus under grant ANID-MILENIO-NCS2025_69. Undurraga acknowledges funding by Fondecyt Regular ID 15894 Folio 1230510. All errors are our own. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.