To describe surgical tips for robot-assisted laparoscopic (RAL) common sheath ureteral reimplantation using the previously reported LUAA technique in patients with duplex renal collecting systems, and to assess the efficacy of this technique by reviewing operative outcomes in a single-institution case series. We retrospectively reviewed a consecutive series of patients with duplicated collecting systems and vesicoureteral reflux (VUR) who underwent RAL extravesical common sheath ureteral reimplantation at a single medical center from 2010 to 2017. We included all duplex ureters requiring antireflux surgery. A standardized technique (LUAA) was used in each case, with additional tips used as described herein: a) careful common sheath ureteral mobilization, b) wide detrusorotomy with adequate detrusor flap elevation from the mucosa, and c) appropriate tension during tunnel detrusorraphy. Patient demographics, perioperative data, and follow-up imaging were reviewed. Radiographic resolution was defined as absence of VUR on voiding cystourethrogram (VCUG) performed 4 months postoperatively. Only patients undergoing ureteral reimplantation for VUR were included. Those with ureterovesical junction obstruction were excluded. A total of 13 patients underwent RAL common sheath ureteral reimplantation, with three bilateral cases for a total of 16 duplicated ureters reimplanted. Mean age at surgery was 3.64 ± 1.04 years. Mean operative time was 125.1 ± 30.73 min in unilateral cases and 200 ± 51.18 in bilateral cases. Complete resolution of VUR was achieved in 14 of 16 ureters (87.50%). There were no high-grade complications (IIIV on the Clavien-Dindo scale). There were two grade II complications in our cohort, with a mean follow-up of 17.18 ± 18.41 months. We report a radiographic success rate of 87.50% for RAL common sheath ureteral reimplantation in children with duplicated ureters, using the LUAA technique with several additional technical considerations. In our experience, careful mobilization of the ureter to preserve vascularity, a wide detrusorotomy to adequately elevate the detrusor flaps, and appropriate tension during detrusorraphy are essential components to optimize outcomes and prevent complications.