Analisis mengenai penambahan biaya akibat dari pemotongan lantai berdasarkan peraturan daerah : studi kasus: pengenaan biaya tambahan Rp. 25.000.000,00 pada Rusunami Menara Kebon Jeruk = Analysis on increased expense due to floor reduction based on the regional regulation: a case study of Rp. 25.000.000,00 additional cost assessment at low income housing Menara Kebon Jeruk / Nessya Chandra