ADU added to a rental: Quantity reconciliation exercise
Compare report quantities with the supported inventory. An accessory unit may share services with an existing rental. Reconcile new construction and allocated shared costs without counting the same system in both buildings.
Preparation resource. Record completion does not determine eligibility, deductions or tax savings. Ask your qualified tax professional to resolve the facts and applicable rules.
What this file should establish
Record the source quantity, unit, location and method of measurement for a material component. Distinguish direct measurement from estimation. A quantity mismatch is a review trigger and does not independently decide classification or cost.
An accessory unit may share services with an existing rental. Reconcile new construction and allocated shared costs without counting the same system in both buildings.
A situation to work through
A backyard unit connects to the main house's water and electrical service.
For this situation, start with ADU plans. Identify the period and legal owner before combining it with the other records. Keep the original source and explain any adjustments in a separate reconciliation.
Review point
Specifically review the risk of duplicating shared utility costs across two studies.
The report uses a total property area for a smaller component.
Question for the reviewer
What measurement supports the reported quantity and what remains estimated?
Expected handoff
A measured-versus-reported quantity bridge.
Separate facts supported by documents from estimates and unresolved assumptions. Assign each missing item to a responsible person and a date. Send the reconciliation alongside the source references so the reviewer can trace each conclusion.
Your preparation worksheet
Enter a reference to the document, the person who can supply it and the unresolved question. Use file names or locations rather than account numbers or other sensitive information. Entries stay in this page until you close or refresh it. They are not sent to us or saved automatically. Export before leaving.
Record or decision
Source reference
Status
Responsible person
Open question
ADU plans
permits
contractor costs
utility routes
and completion records
component
measured quantity
unit
reported quantity
measurement source
Mark not applicable only after noting why. A collected record can still require correction. Review the exported file before sharing it with your adviser.
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.