We present a case in which a 23-year-old male patient diagnosed with nasoseptal chondrosarcoma with anterior cranial fossa extension underwent combined surgical approaches to optimize complete resection of the tumor. Surgery was followed by a 6-month course of proton-beam radiation therapy. Extensive tumors of this type with significant intracranial extension require surgical repair of the anterior fossa floor. We employed a repair technique not previously associated with the resection of these tumors, using a split-calvaria osteoplastic rotational flap. This method provided structural integrity while avoiding the risks associated with the use of free bone grafts and metallic meshes.