Tax Legal Services · Primary-source case analysis

Helvering v. Bruun: Repossessing a Lessee-Built Improvement Produced Gain Under the Law Then Applied

By Aneeta Mishra and Timothy Chan

Published August 29, 2026

Helvering v. Bruun concerned a tenant who demolished an old structure, erected a new building, defaulted, and returned possession of the improved real estate to the landlord.

The landlord recovered materially improved property

At repossession the new building increased the value of the landlord’s property beyond the adjusted basis associated with the old structure.

The Court found realization without a cash sale

The gain was embodied in property returned to the taxpayer’s control, and realization did not require severability into cash.

The gain was assigned to the repossession year

The Court treated termination of the lease and recovery of the improvement as the identifiable event completing the accession.

Congress changed the practical rule

Current sections 109 and 1019 generally exclude qualifying lessor income from lessee improvements at lease termination and deny a corresponding basis increase, subject to statutory details and exceptions.

Key takeaways

• Review the lease, improvement obligations, and termination event.
• Determine whether section 109 applies to the improvement.
• Apply section 1019 when tracking the lessor’s basis.
• Distinguish rent paid in improvements from improvements merely reverting at termination.