Background: Sinonasal adenocarcinomas are a rare malignancy, and historically surgically resected via an open craniofacial resections. With the rise of endoscopic techniques there has been a shift in addressing these tumours via an endoscopic approach. This project aimed to assess the surgical outcomes from two institutions in Melbourne, Australia and ensure oncologic outcomes are maintained with a switch to an endoscopic approach. Methods: Retrospective analysis of patients undergoing craniofacial resection for adenocarcinoma at two tertiary centres between 2011-2023. Open and endoscopic craniofacial approaches were included for analysis, assessing both oncological and in-hospital outcomes. Results: Over eleven years, 32 patients underwent surgery, with 27 patients included for analysis. Median age was 67 years, with only a single female patient included. Five patients developed recurrence during their follow up period (median=4.33 years IQR=2.65-5.46), one of which underwent endoscopic craniofacial resection. Conclusion: This is one of the largest studies examining outcomes for sinonasal adenocarcinoma in the post endoscopic era in Australia. Rate of recurrence was lower for endoscopic craniofacial resection, with similar complication rates compared with an open approach. This reinforces endoscopic craniofacial resection as an appropriate alternative surgical technique in selected populations.