I wouldn’t apply a blanket condition percentage yet. A 3-bed layout within 35 m² is unusual enough that usability may matter more than the finishes, especially with space lost to the duplex arrangement.
Before adjusting anything, compare the completed sale room by room: floor, lift access...
How firm is the €3,467 rent? A current signed tenancy, a local agent’s estimate and an optimistic listing comparison are very different evidence. For a 4-bed country home, tenant turnover could also be expensive even if the vacancy period itself is short—cleaning, minor repairs and management...