This thesis aims to study the technical and economic feasibility of developing an operator of dark fibre in the city of Barcelona to provide rental fibre services and room to telecom operators to offer high-speed connectivity services to optimally rolling out a civil infrastructure with the aim to transform operators high investment costs in operating expenses. Currently, the 22@Barcelona municipal company operates as a neutral dark fibre operator on a network that is rolled out in the area of PobleNou. This municipal network is used by several telecom operators to offer their services to businesses. Taking into account the success of this model, it is of interest to study the fit of a network of its kind in the rest of the city, so that citizens, businesses and entities can benefit from the advantages of such a network model. Taking into account the above, this thesis aims to build a technical solution and an economic model for the deployment of a fibre optic network in the city of Barcelona, managed as neutral dark fibre network. This project will seek to discover the main issues to be faced by the hypothetical neutral operator in developing a network of these characteristics. The business plan of this project consists of the following points: • Make a market study to determine the density of demand in the city (residential and business sector). • Based on this demand, study the civil infrastructure and technological solution needed to cover it, exploring all the possibilities that the city can offer (service galleries, sewers, Underground existing pipes, etc ...). • Dimension the optical fibre network needed, but also taking into account that this network can be used for self-provision services of the city (traffic lights, traffic cameras, street lights, wifi, etc.). • Develop a business model, which consists in developing a business plan and study the economic feasibility of the project. This business model has been made taking into account the existing regulatory framework for telecom networks operation by Public Administrations.