Imposes a new excise tax on certain taxpayers who fail to sell excess single-family residences and stops some tax benefits for owners covered by the new rule. Specifically, the law adds a new chapter to the Internal Revenue Code creating an excise tax aimed at owners who keep excess single-family homes instead of selling them, and it disallows mortgage interest deductions on acquisition loans and depreciation deductions for single-family homes owned by taxpayers who are liable under the referenced chapter. Both changes apply to taxable years beginning after the date of enactment.