THE’expansion of buildings or real estate units can take place through the design that takes into account the residual indices expressed by the area of relevance, if the building potential of this area express the possibility of Build further volumes or surfaces.
In this area, the condition established by the technical standards of implementation of the current general urban planning tool for monopian or small buildings can also be counted, to ensure, in any case, one minimum and dignified building To all, in derogation of the building potential provided for the reference area.
Another possibility for the expansion of the buildings may derive from the technical standards of implementing the general urban planning of the Municipality of belonging which, often, for small buildings mostly monopian, offer one Derogating from national urban planning indicesto guarantee the satisfaction of the needs of the housing nucleus.
Types of expansion that fall within the building renovation
Generally, the latter types of expansion constitute building renovation interventions and can also be achieved in derogation to the discipline of urban plans, stop while remaining:
- compliance with the distances from the windowed walls of the buildings;
- compliance with seismic rules;
- compliance with the typological, formal and constructive indications of the punctual level of urban planning tools or of the local planning acts;
- compliance with the minimum energy performance requirements of buildings.
The regional rules can:
- provide for the possibility of expansion also for buildings intended for use other than residence, as a socio-welfare and socio-educational;
- In the event of division of the real estate unit affected by the expansion, to provide for a minimum area of the fractional real estate units.
More generally, the expansion interventions possibly provided for by the regional laws on the recovery of the existing building heritage can increase:
- If the whole existing building bodyincluding the portion subject to expansion, come:
- structurally adequate to the anti -seismic rules in force;
- Equipped with energy production plants from renewable sources;
- That is, it complies with the energy performance requirements of buildings.
- for expansions of rural buildings of testimonial value to residential intended, including partially inruce, as a reward in relation to the obligation, to be assumed by the owner or the incorrect title, to carry out the relative expansion interventions, in compliance:
- of the type;
- of traditional local materials;
- of construction techniques characterizing the existing building.
Design intervention of expansion
The project for the expansion of a residential building represents the definition of the needs of the client in relation to the physical and urban characteristics of the area subject to intervention (building lot) and the existing building.
The physical characteristics They are represented by the orography of the area, by the shape, by the presence of binding elements, such as trees, ditches, pylons, underground services, etc.
The urban characteristics Instead, they are represented by the regulatory and limiting elements envisaged by the urban planning tools in force for the project area, such as: territorial index, landmark index, distances from the borders, heights of the buildings, constraints on the destinations and, in the case of extensions, obviously it must also be considered the surface or volume of the existing building, to be added to those of intervention, for the verification and respect of the urban standards.
To this must be added the hygienic-sanitary, environmental, safety, anti-seismic and protection standards.
Projects relating to the construction of new buildings or buildings undergoing significant renovations have theobligation to integrate renewable energy sourcespursuant to article 11 of Legislative Decree 3 March 2011, n. 28. The non -compliance with this obligation entails the refusal of the release of the building title.
