For a significant residential conversion in Belleville, Ontario, Canada, we were responsible for the complete drafting and BIM modeling required to transform the building into a duplex. This complex project demanded precise documentation across disciplines, beginning with code-compliant architectural floor plans and elevation/section views. We seamlessly integrated the engineer-specified structural modifications for load-bearing elements and coordinated the necessary HVAC system drawings to utilize existing mechanical capacity for the new unit. This detailed, integrated BIM package was issued as a single, fully coordinated set, proactively preventing construction errors and ensuring a streamlined permit approval process.