DOI: 10.7764/RDLC.17.3.401Currently in Chile several programs are used in order to promote sustainable construction. On this scenario was created S.D. N°. 255 of the House and Urban Development Minister of Chile which, among other objectives, seeks to thermally refurbish houses to provide greater comfort to the inhabitants of this. In practice, this thermal reconditioning has not been implemented in the Metropolitan Region due to in none of its versions funds have been allocated to it. This paper quantifies how much the social benefit would increase if the subsidy was applied in RM. For this, various representative dwellings of housing stock were modeled and was done an economic analysis that led to the conclusion that it is beneficial, at least from a social standpoint, its application.