3. Necessary expenses
Necessary expenses are those, as mentioned above, objectively necessary for maintaining the lease suitable for the agreed use. These expenses may concern maintenance and repair works of the lease and primarily burden the lessor (Civil Code Articles 575 and 592). In case they are paid by the lessee, then the latter can seek them based on the contract or the provisions for actual defects of the lease (Civil Code Article 578), or the provisions for the management of others' affairs or unjust enrichment. Usually, the lessee will undertake these expenses themselves, although they do not burden them, either in order to maintain the lease suitable for the agreed use, in case the lessor neglects to undertake them, or in order to avoid a substantial, direct, and imminent risk of deterioration or destruction of the lease (e.g., replacement of broken glass panes or water pipes, roof insulation from which rainwater enters the lease, restoration of water pipes, sewerage, central heating, elevator, water heater, electrical installation - Athens Court of Appeal 7389/2006, foundation support, restoration of damages from earthquakes - 346/1980 Thessaloniki Court of First Instance, while according to Supreme Court 65/2008, the installation of a security door was considered a necessary expense).
In case of total destruction of the lease, the lessee is not entitled to demand expenses for complete reconstruction, nor to demand reconstruction, as the lease contract is terminated.
4.
Beneficial expenses are considered those that objectively increase the market value of the lease e.g., expenses for the construction of a building on the leased property or for planting fruit trees on the leased barren land, installation of an air conditioning system etc. These expenses are returned according to the provisions for the management of others' affairs (Civil Code Article 591 § 2 item α'). Thus, in case they were made for the benefit of the lessor and according to their real or presumed will, the lessee can seek them from the lessor based on the provisions for the mandate (736 Civil Code), while in any other case they are returned according to the provisions for unjust enrichment (737 and 904 et seq. Civil Code). In this case, either a real saving of expenses for the lessor is required or an inclusion in them of economic value that has a truly beneficial impact for them (see Patras Court of Appeal 1031/2008 which stated that "In this case, namely, it is crucial if the enriched lessor a) actually saved expenses to which they would otherwise definitely have proceeded or were obliged to proceed and b) if an economic value came to them, which truly has a beneficial impact for them, aiming for this at the specific subjective conditions of the recipient of the enrichment. Thus, for example, an expense on another's property that increases its market value or the possible revenues from it (e.g., rents), in reality, does not benefit the owner if they intend to maintain the property for their exclusive use, being unable or having no interest based on the subjective conditions under which they operate to liquidate or otherwise exploit it. Only, therefore, if and to the extent there is an actual and specific enrichment, the enriched is obliged to return the enrichment to that extent"). In the same way, luxurious expenses are returned, namely, those made to satisfy the lessee's particular aesthetic demands or whims, such as replacing sanitary ware with more luxurious ones, painting walls by a distinguished painter etc.
In practice, it is common for the lessee to waive the right to seek the above expenses (Thessaloniki Court of Appeal 2446/2006), even if they are due to a defect of the lease (Athens Court of First Instance 3592/1997).
It is noted that expenses for replacement made by the lessee cannot be considered beneficial for the lease. Thus, if the lease has a specific spatial layout that does not serve the lessee and they proceed to a new layout, replacing the old layout of the space, this expense cannot be considered beneficial for the lessor in every case, and thus the lessee does not always have the right to claim these expenses.
The lessee's right to demand the above expenses (necessary, beneficial, luxurious) is barred six months after the termination of the lease (603 Civil Code). The amount returned in case of beneficial expense is that by which the value of the lease increased and provided that this increase is preserved. If the increase in the value of the lease amounts to more than the expense, then the lessee is entitled to demand only the amount of the expense.
5. Wear or alterations
In case of wear of the lease, even if it resulted from the agreed or customary use by the lessee (Civil Code 592), the lessor is obliged to undertake the related maintenance and repair works. This provision is also dispositive law, thus again the parties have the possibility to agree differently. Conversely, in case of damage or destruction of the lease due to the fault of the lessee or persons for whom they are responsible (e.g., cohabitants), an obligation arises for the lessee to compensate the lessor (see Larissa Court of Appeal 175/2004 which ruled that "Since from the provisions of Articles 574, 599 §1, 600, 335, and 336 item a' of the Civil Code it follows that in case the lessee cannot return the lease in the condition they received it because it was destroyed or damaged by fire and was not insured, they are in principle obliged to compensate the lessor when the fire is due to their negligence or that of their cohabitants").
Therefore, if nothing different has been agreed, the lessee is not responsible and, therefore, is not obliged to restore the alterations due to the agreed use such as the colors (walls, doors, or windows), wallpaper or carpet, while, conversely, they are responsible for example for the damage of the floor due to water that they did not take care of and left to stagnate for a long period, or for wear caused to the floor requiring stuccoing, or for the wear of a lock requiring restoration. Courts have ruled that the destruction of the facade wall (Athens Court of Appeal 7729/1996) and the wear resulting from the removal of heating bodies or fuses from the electrical panel, from the wall excavation of the toilet for water transfer to another point, and from not cleaning the wallpaper and painting the walls (Larissa Court of Appeal 143/2007) are not due to usual use.
6. Epilogue
From the above, it is concluded that in principle most of the expenses of leased properties seem to burden the lessor by law. However, in practice, it is observed that either following a relevant agreement between the contracting parties or based on the actual circumstances of each case, they may burden either the lessor or the lessee. For this reason, when concluding a lease contract, particular attention is recommended to the individual terms that the parties will agree on, as they may be found responsible for the payment of expenses that by law may have burdened their counterpart.