Execution works and comprehensive renovation of a multi-family building comprising 3 commercial premises on the ground floor and 13 dwellings distributed over several floors, located on Mercè Street, numbers 28-19, and Plata Street, numbers 3-5, in the city of Barcelona. The works include structural rehabilitation, renovation of installations, improvement of energy efficiency, adaptation of common and private spaces, as well as the updating of facades and architectural elements in order to improve the habitability, safety, and comfort conditions of the building.