Renovation works aiming at restoring buildings to the original or almost original technical and utility value.

The performed renovation work is classified as major overhaul on the basis of the criterion of quantity (at least 60%) of all basic construction elements and installations subject to major repairs or replacements which requires relocation of people from residential premises (all or some of them).

1. The basic construction elements include: load-bearing walls, roof structure and roof work, outer and inner plasters, ceilings, window and door frames woodwork, floors and heating furnaces.

2. Installations in buildings include: water-supply system, sewage system, central heating, hot water, gas network, electrical systems and lifts.