The data of the European Builders Confederation-EBC and the European Construction Industry Federation-FIEC certify the growing impact that this new model is generating in the focus of SMEs in the construction sector. In fact, 98.1% of construction companies are small companies, on which the large construction companies that operate internationally depend. But Build to Rent advocates the quality of the built object as it must be managed for the rest of your life. Patrick MacLeamy announced with his 5-20-70 the impact of the management and operation of a building: every 5 euros invested in the design, these became 20 euros of construction, but in turn generated costs of 70 euros for its maintenance and operation. Therefore, investing in an easily operable and maintainable construction is essential. And this is modular construction.