From the homeowner’s perspective, the market of proposed services and renovation professionals is often considered fragmented and complex. A lack of support and understanding of the overall package can lead to demotivation or mistrust. This mistrust can be aggravated by bad communication on the feedback of some projects. From the professionals’ point of view, the lack of qualified employees or materials can be a barrier to increasing the rhythm of renovation. The size of the companies can also influence its survival in time. The lack of standardised solutions necessarily implies a diversification of the knowledge and a possible loss of time for the realisation of the project. Furthermore, the legal or regulatory framework has a strong impact on the renovation incentive policy, the organisation and the fragmentation of the market as well as on the access to financial devices. The state and governmental authorities have, therefore, an important role to play in accelerating the pace of renovation.

From the owner’s point of view, the fragmentation of the market and the legal framework can lead to a complex administrative process. Following this stage, the follow-up and organisation of the renovation work requires specific management skills. There may also be a difference between the expected results and the actual results.

Often owners must adapt a building that was designed to deal with past needs to current issues, techniques and materials. A negative consideration of this point can cause important disorders on the construction site, the building, the maintenance, etc. For example, the most common disorders concern ventilation, infiltration or the structure of the building.

From a sociological point of view, personal views and beliefs can be very important in the decision-making process. It is then difficult to provide quality information that can facilitate this process. This point is aggravated in the case of co-ownerships. Not all occupants necessarily have the same objectives, expectations, priorities or understanding of the renovation project. Personal affinities can also complicate the situation.

With the high investment and debt costs associated with renovation and long payback periods, owners are often reluctant to renovate. The involvement of stakeholders and financial mechanisms are often necessary to motivate and facilitate this step. In addition, fluctuating energy markets and material prices play a major role in the initial investment and payback period of projects. These fluctuations can be very disparate depending on the price of the countries of Europe.