As in any other sector, the construction industry needs to improve its processes and create differentiations in the face of its competitors, in order to increase profits and minimize losses. Because of this, top management seeks solutions to make their company stand out in the market. Traditional capital budgeting evaluation models, such as the Discounted Cash Flow (DCF) method, do not consider the value of the uncertainties and the flexibility that may exist in the project. With this in mind, this paper analyzes, through the Real Options approach, a way to minimize the risks of a residential project by determining the optimal time to expand it. To this end, we will use data from a residential development located in the western zone of the city of Rio de Janeiro, which will be submitted to a model based on Real Options guidelines. The results obtained in the three scenarios analyzed in the numerical model indicate that when the sales velocity is constant, it is best to defer the expansion as long as possible since this postpones the investment costs and increases the revenues.