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Mixed-use buildings preparation files
Map commercial and residential areas and shared systems.
Preparation resource. Record completion does not determine eligibility, deductions or tax savings. Ask your qualified tax professional to resolve the facts and applicable rules.
Start with the operating facts
A retail unit and apartments share a major building system.
Record use, ownership and allocation assumptions for the shared work.
Collect floor plan; commercial leases; residential leases; area measurements; project invoices. Match each document to the relevant entity, property and reporting period. Then choose the decision below that matches the question you need to resolve.
Source and review boundaries
Use the following primary guidance to frame the questions. The worksheet organizes facts; it does not replace analysis of the relevant year, ownership, elections or state treatment. Record the applicable period, confirm the source version and retain the preparer's written conclusions with the supporting documents.
Published 2026-10-09. Prepared by AE Tax Advisors as an educational record-collection resource.
Focused implementation guides
Resolve the related evidence question before carrying a planning assumption into implementation.