H.R. 539: To amend the Internal Revenue Code of 1986 to increase and extend the energy efficient commercial buildings deduction. H.R. 539: Buildings for the 21st Century Act Referred to the House Committee on Ways and Means. 2007-01-17 H.R. 539: Buildings for the 21st Century Act h H.R. 539: Buildings for the 21st Century Act (110th Congress) Buildings for the 21st Century Act To amend the Internal Revenue Code of 1986 to increase and extend the energy efficient commercial buildings deduction. 2007-01-17 110 2007-01-17 539 introduced HouseBill LegislativeAction OfficialTitle ShortTitle