http://in.answers.yahoo.com/question/index?qid=20081030105717AAyv00Q

The term "Carpet Area" refers to the total usable area within the four walls of an apartment or a commercial space, as the case may be. In other words, it refers to the area for which a carpet can be laid if required by the owners.

The term "Plinth Area" refers to the entire carpet area along with the thickness of the external walls of the apartment. It obviously includes the thickness of the internal walls and the columns, if any, lying within the four walls of an apartment. The commercial space is not taken into account in calculating the plinth area.

The term "Super Built-up Area" refers to the plinth area of an apartment or a commercial unit as added by the balconies and other common areas like corridors, staircase, lift room, motor room, security room, meeting hall, gymnasium and an area reserved for indoor games.

Т.е, Plinth Area - это площади полов + толщина внутренних и наружных стен здания. Как это звучит на русском?

Площадь застройки — площадь горизонтального сечения здания на уровне цоколя, включая его выступающие части
http://doma-paneli.ru/construction-terms/obshhaja-ploshhad-zastrojki-doma

Периметр, как я понимаю, это сумма всех длин фасадов