Orhaneli is a settlement which has been founded in the Roman era, where has located in the southern part of Bursa at the Marmara Region. Orhaneli is one of the Highland Region districts with the other three regions, at the southern part of Bursa City. Urban texture has consisted of buildings which were constructed with vernacular materials and traditional techniques until about half a century ago. Original texture of Orhaneli has transformed into multi-storey concrete constructions nowadays, as it is visible at many other Anatolian towns and cities. There are still preserved traditional houses, despite the disappearing of original texture. Remzi Bey Mansion is one of the most remarkable buildings of Orhaneli which can provides estimation about original texture of the town. The mansion is a four-iwaned building with a central hall which was built with local materials and traditional techniques. New houses were constructed with similar identity in the garden and new spaces were added in the need to contemporary lifestyle. The original plan has lost after the division of the property. Maintenance and repair has become an issue. Conservation issues of traditional architectural heritage of Orhaneli are specified in terms of Remzi Bey Mansion in this study