What applies to homeowners' associations?

If energy efficiency measures are carried out on a building consisting of several owner-occupied flats, a certificate must generally be issued for each individual flat. It is acceptable for the specialist company to issue a collective certificate for simplification purposes if the renovation expenses relate to the entire building or if the expenses attributable to the private property of individual flats can be clearly and unambiguously allocated to the individual flats.

If the owners' association has appointed a manager to handle its tasks and interests, the manager should be addressed as the client. In these cases, it is sufficient for the manager to allocate the expenses attributable to the co-ownership according to the ratio of the co-ownership share and inform the individual flat owner.

To do this, the manager creates a number of copies of the specialist company's certificate corresponding to the number of beneficiaries, on which they note the amount of expenses attributable to each beneficiary for the entire building and allocate the expenses attributable to the private property of individual flats to the specific flat owners.